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Li J, Chen Y, Wang L, Li D, Liu L, Li M. An ethylene response factor AcERF116 identified from A. catechu is involved in fruitlet abscission. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 344:112091. [PMID: 38615719 DOI: 10.1016/j.plantsci.2024.112091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/09/2024] [Accepted: 04/11/2024] [Indexed: 04/16/2024]
Abstract
Procedural abscission of outer reproductive organs during flower and fruit development occurs in most plant lineages. Undesired abscission, such as fruitlet shedding causes considerable yield loss in many fruit-producing species. Ethylene is one of the key factors regulating organ abscission. However, the participants involved in the ethylene-mediated abscission pathway remains largely unidentified. In this study, we focused on the ethylene response transcription factors (ERFs) regulating fruitlet abscission in an industrial tree species, A. catechu. A total of 165 ERF genes have been found in the A. catechu genome and eight of these showed distinct expression between the "about-to-abscise" and "non-abscised" samples. An AcERF116 gene with high expression level in the fruit abscission zone (FAZ) was selected for further study. Overexpression of the AcERF116 gene accelerated cell separation in the abscission zone (AZ) and promoted pedicel abscission in transgenic tomato lines. The PG (ploygalacturonase) activity was enhanced in the FAZs of A. catechu fruitlets during ethylene-induced fruitlet abscission, while the PME (pectin methylesterase) activity was suppressed. In addition, cytosolic alkalization was observed in the AZs during abscission in both tomato and A. catechu. Our results suggest that AcERF116 plays a critical role in the crosstalk of ethylene and fruitlet abscission in A. catechu.
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Affiliation(s)
- Jia Li
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339, PR China
| | - Yunche Chen
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339, PR China; College of Life Sciences, Chongqing Normal University, Chongqing 401331, PR China
| | - Linkai Wang
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339, PR China
| | - Dongxia Li
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339, PR China
| | - Liyun Liu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339, PR China.
| | - Meng Li
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, PR China.
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Kavka M, Balles A, Böhm C, Dehmer KJ, Fella C, Rose F, Saal B, Schulze S, Willner E, Melzer M. Phenotypic screening of seed retention and histological analysis of the abscission zone in Festuca pratensis and Lolium perenne. BMC PLANT BIOLOGY 2024; 24:577. [PMID: 38890560 PMCID: PMC11184695 DOI: 10.1186/s12870-024-05231-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 05/31/2024] [Indexed: 06/20/2024]
Abstract
BACKGROUND Seed retention is the basic prerequisite for seed harvest. However, only little breeding progress has been achieved for this trait in the major forage grasses. The aim of this study was to evaluate the potential of plant genetic resources of the important fodder grasses Festuca pratensis Huds. and Lolium perenne L. as source for seed retention in the breeding process. Furthermore, the morphology of the abscission zone, where shattering occurs, was studied on the cell tissue level in different developmental stages of contrasting accessions. RESULTS 150 and 286 accessions of Festuca pratensis and Lolium perenne were screened for seed retention, respectively. Contrasting accessions were selected to be tested in a second year. We found a great variation in seed retention in Festuca pratensis and Lolium perenne, ranging from 13 to 71% (average: 35%) and 12 to 94% (average: 49%), respectively, in the first year. Seed retention was generally lower in the second year. Cultivars were within the accessions with highest seed retention in Festuca pratensis, but had lower seed retention than ecotypes in Lolium perenne. Field-shattered seeds had a lower thousand grain weight than retained seeds. Cell layers of the abscission zone appeared already in early seed stages and were nested within each other in accessions with high seed retention, while there were two to three superimposed layers in accessions with low seed retention. CONCLUSIONS Plant genetic resources of Lolium perenne might be a valuable source for breeding varieties with high seed retention. However, simultaneous selection for high seed weight is necessary for developing successful commercial cultivars.
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Affiliation(s)
- Mareike Kavka
- Genebank, Satellite Collections North, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Inselstraße 9, 23999, Malchow/Poel, Germany.
| | - Andreas Balles
- Development Center X-Ray Technology, Magnetic Resonance and X-Ray Imaging, Fraunhofer IIS, Josef- Martin-Weg 63, 97074, Würzburg, Germany
| | - Christof Böhm
- Saatzucht Steinach GmbH und Co. KG, Wittelsbacherstraße 15, 94377, Steinach, Germany
| | - Klaus J Dehmer
- Genebank, Satellite Collections North, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Inselstraße 9, 23999, Malchow/Poel, Germany
| | - Christian Fella
- Development Center X-Ray Technology, Magnetic Resonance and X-Ray Imaging, Fraunhofer IIS, Josef- Martin-Weg 63, 97074, Würzburg, Germany
| | - Felix Rose
- Physiology and Cell Biology, Structural Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstraße 3, 06466, Gatersleben, Germany
| | - Bernhard Saal
- PlantaServ GmbH, Erdinger Straße 82a, 85356, Freising, Germany
| | - Sabine Schulze
- Saatzucht Steinach GmbH und Co. KG, Klockower Straße 1, 17219, Ankershagen, Germany
| | - Evelin Willner
- Genebank, Satellite Collections North, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Inselstraße 9, 23999, Malchow/Poel, Germany
| | - Michael Melzer
- Physiology and Cell Biology, Structural Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstraße 3, 06466, Gatersleben, Germany
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Xu Y, Liu L, Jia M, Teng K, Mu N, Guo Y, Liu M, Wu J, Teng W, Huang L, Fan X, Yue Y. Transcriptomic and physiological analysis provide new insight into seed shattering mechanism in Pennisetum alopecuroides 'Liqiu'. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2024; 137:157. [PMID: 38861001 DOI: 10.1007/s00122-024-04655-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 05/21/2024] [Indexed: 06/12/2024]
Abstract
KEY MESSAGE Through the histological, physiological, and transcriptome-level identification of the abscission zone of Pennisetum alopecuroides 'Liqiu', we explored the structure and the genes related to seed shattering, ultimately revealing the regulatory network of seed shattering in P. alopecuroides. Pennisetum alopecuroides is one of the most representative ornamental grass species of Pennisetum genus. It has unique inflorescence, elegant appearance, and strong stress tolerance. However, the shattering of seeds not only reduces the ornamental effect, but also hinders the seed production. In order to understand the potential mechanisms of seed shattering in P. alopecuroides, we conducted morphological, histological, physiological, and transcriptomic analyses on P. alopecuroides cv. 'Liqiu'. According to histological findings, the seed shattering of 'Liqiu' was determined by the abscission zone at the base of the pedicel. Correlation analysis showed that seed shattering was significantly correlated with cellulase, lignin, auxin, gibberellin, cytokinin and jasmonic acid. Through a combination of histological and physiological analyses, we observed the accumulation of cellulase and lignin during 'Liqiu' seed abscission. We used PacBio full-length transcriptome sequencing (SMRT) combined with next-generation sequencing (NGS) transcriptome technology to improve the transcriptome data of 'Liqiu'. Transcriptomics further identified many differential genes involved in cellulase, lignin and plant hormone-related pathways. This study will provide new insights into the research on the shattering mechanism of P. alopecuroides.
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Affiliation(s)
- Yue Xu
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
- College of Grassland Science and Technology, Sichuan Agriculture University, Chengdu, 610000, People's Republic of China
| | - Lingyun Liu
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Ming Jia
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Ke Teng
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Na Mu
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Yidi Guo
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Muye Liu
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Juying Wu
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Wenjun Teng
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China
| | - Linkai Huang
- College of Grassland Science and Technology, Sichuan Agriculture University, Chengdu, 610000, People's Republic of China
| | - Xifeng Fan
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China.
| | - Yuesen Yue
- Institute of Grassland, Flower and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China.
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Ma X, He Z, Yuan Y, Liang Z, Zhang H, Lalun VO, Liu Z, Zhang Y, Huang Z, Huang Y, Li J, Zhao M. The transcriptional control of LcIDL1-LcHSL2 complex by LcARF5 integrates auxin and ethylene signaling for litchi fruitlet abscission. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:1206-1226. [PMID: 38517216 DOI: 10.1111/jipb.13646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/01/2024] [Indexed: 03/23/2024]
Abstract
At the physiological level, the interplay between auxin and ethylene has long been recognized as crucial for the regulation of organ abscission in plants. However, the underlying molecular mechanisms remain unknown. Here, we identified transcription factors involved in indoleacetic acid (IAA) and ethylene (ET) signaling that directly regulate the expression of INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) and its receptor HAESA (HAE), which are key components initiating abscission. Specifically, litchi IDA-like 1 (LcIDL1) interacts with the receptor HAESA-like 2 (LcHSL2). Through in vitro and in vivo experiments, we determined that the auxin response factor LcARF5 directly binds and activates both LcIDL1 and LcHSL2. Furthermore, we found that the ETHYLENE INSENSITIVE 3-like transcription factor LcEIL3 directly binds and activates LcIDL1. The expression of IDA and HSL2 homologs was enhanced in LcARF5 and LcEIL3 transgenic Arabidopsis plants, but reduced in ein3 eil1 mutants. Consistently, the expressions of LcIDL1 and LcHSL2 were significantly decreased in LcARF5- and LcEIL3-silenced fruitlet abscission zones (FAZ), which correlated with a lower rate of fruitlet abscission. Depletion of auxin led to an increase in 1-aminocyclopropane-1-carboxylic acid (the precursor of ethylene) levels in the litchi FAZ, followed by abscission activation. Throughout this process, LcARF5 and LcEIL3 were induced in the FAZ. Collectively, our findings suggest that the molecular interactions between litchi AUXIN RESPONSE FACTOR 5 (LcARF5)-LcIDL1/LcHSL2 and LcEIL3-LcIDL1 signaling modules play a role in regulating fruitlet abscission in litchi and provide a long-sought mechanistic explanation for how the interplay between auxin and ethylene is translated into the molecular events that initiate abscission.
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Affiliation(s)
- Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Zidi He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Ye Yuan
- Dongguan Botanical Garden, Dongguan, 523128, China
| | - Zhijian Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Hang Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Vilde Olsson Lalun
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Blindernveien 31, Oslo, 0316, Norway
| | - Zhuoyi Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Yanqing Zhang
- College of Agriculture, Guangxi University, Nanning, 530004, China
| | - Zhiqiang Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Yulian Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
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Wang W, Zhang W, Jamil M, Tu J, Huang L. Editorial: Molecular and genetic mechanisms of plant architecture regulation. FRONTIERS IN PLANT SCIENCE 2024; 15:1421197. [PMID: 38803602 PMCID: PMC11128669 DOI: 10.3389/fpls.2024.1421197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 05/01/2024] [Indexed: 05/29/2024]
Affiliation(s)
- Wenyi Wang
- College of Agriculture, South China Agricultural University, Guangzhou, Guangdong, China
| | - Weiwei Zhang
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, United States
| | - Muhammad Jamil
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, Kohat, Pakistan
| | - Jumin Tu
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Lei Huang
- Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
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Dong X, Liu X, Cheng L, Li R, Ge S, Wang S, Cai Y, Liu Y, Meng S, Jiang CZ, Shi CL, Li T, Fu D, Qi M, Xu T. SlBEL11 regulates flavonoid biosynthesis, thus fine-tuning auxin efflux to prevent premature fruit drop in tomato. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:749-770. [PMID: 38420861 DOI: 10.1111/jipb.13627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/13/2024] [Indexed: 03/02/2024]
Abstract
Auxin regulates flower and fruit abscission, but how developmental signals mediate auxin transport in abscission remains unclear. Here, we reveal the role of the transcription factor BEL1-LIKE HOMEODOMAIN11 (SlBEL11) in regulating auxin transport during abscission in tomato (Solanum lycopersicum). SlBEL11 is highly expressed in the fruit abscission zone, and its expression increases during fruit development. Knockdown of SlBEL11 expression by RNA interference (RNAi) caused premature fruit drop at the breaker (Br) and 3 d post-breaker (Br+3) stages of fruit development. Transcriptome and metabolome analysis of SlBEL11-RNAi lines revealed impaired flavonoid biosynthesis and decreased levels of most flavonoids, especially quercetin, which functions as an auxin transport inhibitor. This suggested that SlBEL11 prevents premature fruit abscission by modulating auxin efflux from fruits, which is crucial for the formation of an auxin response gradient. Indeed, quercetin treatment suppressed premature fruit drop in SlBEL11-RNAi plants. DNA affinity purification sequencing (DAP-seq) analysis indicated that SlBEL11 induced expression of the transcription factor gene SlMYB111 by directly binding to its promoter. Chromatin immunoprecipitation-quantitative polymerase chain reaction and electrophoretic mobility shift assay showed that S. lycopersicum MYELOBLASTOSIS VIRAL ONCOGENE HOMOLOG111 (SlMYB111) induces the expression of the core flavonoid biosynthesis genes SlCHS1, SlCHI, SlF3H, and SlFLS by directly binding to their promoters. Our findings suggest that the SlBEL11-SlMYB111 module modulates flavonoid biosynthesis to fine-tune auxin efflux from fruits and thus maintain an auxin response gradient in the pedicel, thereby preventing premature fruit drop.
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Affiliation(s)
- Xiufen Dong
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Hangzhou, 311300, China
- Key Laboratory for Quality and Safety Control of Subtropical Fruits and Vegetables, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A&F University, Hangzhou, 311300, China
| | - Xianfeng Liu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Lina Cheng
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Ruizhen Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Siqi Ge
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Sai Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Yue Cai
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Yang Liu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Sida Meng
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Cai-Zhong Jiang
- Crops Pathology and Genetic Research Unit, United States Department of Agriculture Agricultural Research Service, Washington, DC, 20250, USA
- Department of Plant Sciences, University of California, Davis, CA, 95616, USA
| | | | - Tianlai Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Daqi Fu
- Laboratory of Fruit Biology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Mingfang Qi
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
| | - Tao Xu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, 110866, China
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Qiu Z, Hou Q, Wen Z, Tian T, Hong Y, Yang K, Qiao G, Wen X. Identification of PavHB16 gene in Prunus avium and validation of its function in Arabidopsis thaliana. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2024; 30:559-570. [PMID: 38737325 PMCID: PMC11087415 DOI: 10.1007/s12298-024-01443-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/21/2024] [Accepted: 03/21/2024] [Indexed: 05/14/2024]
Abstract
Sweet cherry (Prunus avium L.) is one of the most economically important fruits in the world. However, severe fruit abscission has brought significant challenges to the cherry industry. To better understand the molecular regulation mechanisms underlying excessive fruit abscission in sweet cherry, the fruit abscission characteristics, the anatomical characteristics of the abscission zone (AZ), as well as a homeodomain-Leucine Zipper gene family member PavHB16 function were analyzed. The results showed that the sweet cherry exhibited two fruit abscission peak stages, with the "Brooks" cultivar demonstrating the highest fruit-dropping rate (97.14%). During these two fruit abscission peak stages, both the retention pedicel and the abscising pedicel formed AZs. but the AZ in the abscising pedicel was more pronounced. In addition, a transcription factor, PavHB16, was identified from sweet cherry. The evolutionary analysis showed that there was high homology between PavHB16 and AtHB12 in Arabidopsis. Moreover, the PavHB16 protein was localized in the nucleus. Overexpression of PavHB16 in Arabidopsis accelerated petal shedding. In the PavHB16-overexpressed lines, the AZ cells in the pedicel became smaller and denser, and the expression of genes involved in cell wall remodeling, such as cellulase 3 gene (AtCEL3), polygalacturonase 1 (AtPG1), and expandin 24(AtEXPA24) were upregulated. The results suggest that PavHB16 may promote the expression of genes related to cell wall remodeling, ultimately facilitating fruit abscission. In summary, this study cloned the sweet cherry PavHB16 gene and confirmed its function in regulating sweet cherry fruit abscission, which provided new data for further study on the fruit abscission mechanism. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-024-01443-8.
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Affiliation(s)
- Zhilang Qiu
- Key Laboratory of Environmental Pollution Monitoring and Disease Control of Ministry of Education, Immune Cells and Antibody Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Health Medicine Modern Industry), Guizhou Medical University, Guiyang, 550025 China
| | - Qiandong Hou
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Zhuang Wen
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Tian Tian
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Yi Hong
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Kun Yang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Guang Qiao
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
| | - Xiaopeng Wen
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025 Guizhou China
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8
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Li J, Chen Y, Zhou G, Li M. Phytohormones and candidate genes synergistically regulate fruitlet abscission in Areca catechu L. BMC PLANT BIOLOGY 2023; 23:537. [PMID: 37919647 PMCID: PMC10623784 DOI: 10.1186/s12870-023-04562-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 10/26/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND The fruit population of most plants is under the control of a process named "physiological drop" to selectively abort some developing fruitlets. However, frequent fruitlet abscission severely restricts the yield of Areca catechu. To reveal the physiological and molecular variations in this process, we detected the variation of phytohormone levels in abscised and non-abscised fruitlets in A. catechu. RESULTS The levels of gibberellin acid, jasmonic acid, salicylic acid, abscisic acid and zeatin were elevated, while the indole-3-acetic acid and indole-3-carboxaldehyde levels were declined in the "about-to-abscise" part (AB) of abscission zone (AZ) compared to the "non-abscised" part (CK). Then the differentially expressed genes (DEGs) between AB and CK were screened based on transcriptome data. DEGs involved in phytohormone synthesis, response and transportation were identified as key genes. Genes related to cell wall biosynthesis, degradation, loosening and modification, and critical processes during fruit abscission were identified as role players. In addition, genes encoding transcription factors, such as NAC, ERF, WRKY, MADS and Zinc Finger proteins, showed differentially expressed patterns between AB and CK, were also identified as candidates. CONCLUSIONS These results unraveled a phytohormone signaling cross talk and key genes involved in the fruitlet abscission process in A. catechu. This study not only provides a theoretical basis for fruitlet abscission in A. catechu, but also identified many candidate genes or potential molecular markers for further breeding of fruit trees.
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Affiliation(s)
- Jia Li
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, 571339, Hainan, China
| | - Yunche Chen
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, 571339, Hainan, China
| | - Guangzhen Zhou
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Meng Li
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, P. R. China.
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9
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Kućko A, de Dios Alché J, Tranbarger TJ, Wilmowicz E. Abscisic acid- and ethylene-induced abscission of yellow lupine flowers is mediated by jasmonates. JOURNAL OF PLANT PHYSIOLOGY 2023; 290:154119. [PMID: 37879220 DOI: 10.1016/j.jplph.2023.154119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/28/2023] [Accepted: 10/16/2023] [Indexed: 10/27/2023]
Abstract
The appropriate timing of organ abscission determines plant growth, development, reproductive success, and yield in relation to crop species. Among these, yellow lupine is an example of a crop species that loses many fully developed flowers, which limits the formation of pods with high-protein seeds and affects its economic value. Lupine flower abscission, similarly to the separation of other organs, depends on a complex regulatory network functioning in the cells of the abscission zone (AZ). In the present study, genetic, biochemical, and cellular methods were used to highlight the complexity of the interactions among strong hormonal stimulators of abscission, including abscisic acid (ABA), ethylene, and jasmonates (JAs) precisely in the AZ cells, with all results supporting that the JA-related pathway has an important role in the phytohormonal cross-talk leading to flower abscission in yellow lupine. Based on obtained results, we conclude that ABA and ET have positive influence on JAs biosynthesis and signaling pathway in time-dependent manner. Both phytohormones changes lipoxygenase (LOX) gene expression, affects LOX protein abundance, and JA accumulation in AZ cells. We have also shown that the signaling pathway of JA is highly sensitive to ABA and ET, given the accumulation of COI1 receptor and MYC2 transcription factor in response to these phytohormones. The results presented provide novel information about the JAs-dependent separation of organs and provide insight and details about the phytohormone-related mechanisms of lupine flower abscission.
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Affiliation(s)
- Agata Kućko
- Department of Plant Physiology, Institute of Biology, Faculty of Agriculture and Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.
| | - Juan de Dios Alché
- Plant Reproductive Biology and Advanced Microscopy Laboratory, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008, Granada, Spain.
| | - Timothy John Tranbarger
- UMR DIADE, IRD Centre de Montpellier, Institut de Recherche pour le Développement, Université de Montpellier, 911 Avenue Agropolis BP 64501, 34394 CEDEX 5, Montpellier, France.
| | - Emilia Wilmowicz
- Chair of Plant Physiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 1 Lwowska Street, 87-100, Toruń, Poland.
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10
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Wang Y, Xu Y, Liao F, Li T, Li X, Wu B, Hong SB, Xu K, Zang Y, Zheng W. Genome-wide identification of GH9 gene family and the assessment of its role during fruit abscission zone formation in Vaccinium ashei. PLANT CELL REPORTS 2023; 42:1589-1609. [PMID: 37474780 DOI: 10.1007/s00299-023-03049-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 07/07/2023] [Indexed: 07/22/2023]
Abstract
KEY MESSAGE The genomic location and stage-specific expression pattern of GH9 genes reveal their critical roles during fruit abscission zone formation in Vaccinium ashei. Glycosyl hydrolase family 9 (GH9) cellulases play a crucial role in both cellulose synthesis and hydrolysis during plant growth and development. Despite this importance, there is currently no study on the involvement of GH9-encoding genes, specifically VaGH9s, in abscission zone formation of rabbiteye blueberries (Vaccinium ashei). In this study, we identified a total of 61 VaGH9s in the genome, which can be classified into 3 subclasses based on conserved motifs and domains, gene structures, and phylogenetic analyses. Our synteny analysis revealed that VaGH9s are more closely related to the GH9s of Populus L. than to those of Arabidopsis, Vitis vinifera, and Citrus sinensis. In silico structural analysis predicted that most of VaGH9s are hydrophilic, and localized in cell membrane and/or cell wall, and the variable sets of cis-acting regulatory elements and functional diversity with four categories of stress response, hormone regulation, growth and development, and transcription factor-related elements are present in the promoter sequence of VaGH9s genes. Transcriptomic analysis showed that there were 22 differentially expressed VaGH9s in fruit abscission zone tissue at the veraison stage, and the expression of VaGH9B2 and VaGH9C10 was continuously increased during fruit maturation, which were in parallel with the increasing levels of cellulase activity and oxidative stress indicators, suggesting that they are involved in the separation stage of fruit abscission in Vaccinium ashei. Our work identified 22 VaGH9s potentially involved in different stages of fruit abscission and would aid further investigation into the molecular regulation of abscission in rabbiteye blueberries fruit.
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Affiliation(s)
- Yingying Wang
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Yue Xu
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Fangfang Liao
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Ting Li
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Xiaolong Li
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Boping Wu
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Seung-Beom Hong
- Department of Biotechnology, University of Houston Clear Lake, Houston, TX, 77058-1098, USA
| | - Kai Xu
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Yunxiang Zang
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China
| | - Weiwei Zheng
- Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, College of Horticulture Science, Zhejiang A&F University, Wusu Road 666, Hangzhou, 311300, Zhejiang, China.
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11
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He Z, Ma X, Wang F, Li J, Zhao M. LcERF10 functions as a positive regulator of litchi fruitlet abscission. Int J Biol Macromol 2023; 250:126264. [PMID: 37572813 DOI: 10.1016/j.ijbiomac.2023.126264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/14/2023]
Abstract
Phytohormone ethylene is well-known in positive modulation of plant organ abscission. However, the molecular mechanism underlying ethylene-induced abscission remains largely unknown. Here, we identified an ethylene-responsive factor, LcERF10, as a key regulatory gene in litchi fruitlet abscission. LcERF10 was strongly induced in the fruitlet abscission zone (FAZ) during the ethylene-activated abscission. Silencing of LcERF10 in litchi weakened the cytosolic alkalization of the FAZ and reduced fruitlet abscission. Moreover, LcERF10 directly bound the promoter and repressed the expression of LcNHX7, a Na+/H+ exchanger that was down-regulated in FAZ following the ethylene-activated abscission and up-regulated after LcERF10 silencing. Additionally, ectopic expression of LcERF10 in Arabidopsis promoted the cytosolic alkalization of the floral organ AZ and accelerated the floral organ abscission. Collectively, our results suggest that the transcription factor LcERF10 plays a positive role in litchi fruitlet abscission.
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Affiliation(s)
- Zidi He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Fei Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, College of Horticulture, South China Agricultural University, Guangzhou 510642, China; Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, College of Horticulture, South China Agricultural University, Guangzhou 510642, China; Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou 510642, China.
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12
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Wu H, He Q, Wang Q. Advances in Rice Seed Shattering. Int J Mol Sci 2023; 24:ijms24108889. [PMID: 37240235 DOI: 10.3390/ijms24108889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Seed shattering is an important trait that wild rice uses to adapt to the natural environment and maintain population reproduction, and weedy rice also uses it to compete with the rice crop. The loss of shattering is a key event in rice domestication. The degree of shattering is not only one of the main reasons for rice yield reduction but also affects its adaptability to modern mechanical harvesting methods. Therefore, it is important to cultivate rice varieties with a moderate shattering degree. In this paper, the research progress on rice seed shattering in recent years is reviewed, including the physiological basis, morphological and anatomical characteristics of rice seed shattering, inheritance and QTL/gene mapping of rice seed shattering, the molecular mechanism regulating rice seed shattering, the application of seed-shattering genes, and the relationship between seed-shattering genes and domestication.
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Affiliation(s)
- Hao Wu
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Qi He
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Quan Wang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
- College of Agricultural Sciences, Nankai University, Tianjin 300071, China
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13
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Chen J, Ren B, Bian C, Qin D, Zhang L, Li J, Wei J, Wang A, Huo J, Gang H. Transcriptomic and metabolomic analyses reveal molecular mechanisms associated with the natural abscission of blue honeysuckle (Lonicera caerulea L.) ripe fruits. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 199:107740. [PMID: 37150009 DOI: 10.1016/j.plaphy.2023.107740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 04/30/2023] [Accepted: 05/01/2023] [Indexed: 05/09/2023]
Abstract
Blue honeysuckle (Lonicera caerulea L.) is rich in phenolic compounds and has an extremely high nutritional value. Fruit abscission in the ripe period significantly impacts production and economic benefits. However, the mechanism associated with the abscission of blue honeysuckle fruit remains largely unknown. The easy-abscission cultivar 'HSY' and the hard-abscission cultivar 'Berel' were selected as plant materials. Anatomical changes of the 'HSY' fruit abscission zone (FAZ) during the abscission mainly included cell expansion, detachment, and collapse. Active changes in cell wall-degrading enzyme activity between 39 days postanthesis (DPA) and 55 DPA in 'HSY' FAZ, but not in 'Berel', suggest a critical role for cell-wall-degrading enzymes in regulating abscission. Transcriptome and metabolome analyses revealed that the genes and metabolites responding to abscission mainly act on pathways such as plant hormone signal transduction, starch and sucrose metabolism, pentose and glucuronate interconversions, and phenylpropanoid biosynthesis. The regulatory pathways of fruit abscission are mainly summarized into two parts: phytohormone synthesis and signal transduction, FAZ cell wall metabolism. In this study, 46 key genes related to plant hormone response, 45 key genes involved in FAZ cell wall metabolism, and 73 transcription factors were screened. Quantitative real-time PCR (qRT-PCR) assessed the expression pattern of 12 selected candidate genes, demonstrating the accuracy of the transcriptome data and elucidating the expression patterns of key candidate genes during growth and development. This study will provide an essential resource for understanding the molecular regulatory mechanism of fruit abscission in the blue honeysuckle.
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Affiliation(s)
- Jing Chen
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China
| | - Bingbing Ren
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China
| | - Chunyang Bian
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China
| | - Dong Qin
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Institute of Green Food Science, Harbin, 150000, Heilongjiang, China
| | - Lijun Zhang
- Heilongjiang Institute of Green Food Science, Harbin, 150000, Heilongjiang, China
| | - Jiacheng Li
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China
| | - Jia Wei
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China
| | - Aoxue Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Junwei Huo
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Institute of Green Food Science, Harbin, 150000, Heilongjiang, China
| | - Huixin Gang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, College of Horticulture & Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China; National-Local Joint Engineering Research Center for Development and Utilization of Small Fruits in Cold Regions, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Institute of Green Food Science, Harbin, 150000, Heilongjiang, China.
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14
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Liao B, Li F, Yi F, Du M, Tian X, Li Z. Comparative Physiological and Transcriptomic Mechanisms of Defoliation in Cotton in Response to Thidiazuron versus Ethephon. Int J Mol Sci 2023; 24:ijms24087590. [PMID: 37108752 PMCID: PMC10143250 DOI: 10.3390/ijms24087590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/13/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
Thidiazuron (TDZ) is a widely used chemical defoliant in cotton and can stimulate the production of ethylene in leaves, which is believed to be the key factor in inducing leaf abscission. Ethephon (Eth) can also stimulate ethylene production in leaves, but it is less effective in promoting leaf shedding. In this study, the enzyme-linked immunosorbent assays (ELISA) and RNA-seq were used to determine specific changes at hormonal levels as well as transcriptomic mechanisms induced by TDZ compared with Eth. The TDZ significantly reduced the levels of auxin and cytokinin in cotton leaves, but no considerable changes were observed for Eth. In addition, TDZ specifically increased the levels of brassinosteroids and jasmonic acid in the leaves. A total of 13 764 differentially expressed genes that specifically responded to TDZ were identified by RNA-seq. The analysis of KEGG functional categories suggested that the synthesis, metabolism, and signal transduction of auxin, cytokinin, and brassinosteroid were all involved in the TDZ-induced abscission of cotton leaves. Eight auxin transport genes (GhPIN1-c_D, GhPIN3_D, GhPIN8_A, GhABCB19-b_A, GhABCB19-b_D, GhABCB2-b_D, GhLAX6_A, and GhLAX7_D) specifically responded to TDZ. The pro35S::GhPIN3a::YFP transgenic plants showed lower defoliation than the wild type treated with TDZ, and YFP fluorescence in leaves was almost extinguished after treatment with TDZ rather than Eth. This provides direct evidence that GhPIN3a is involved in the leaf abscission induced by TDZ. We found that 959 transcription factors (TFs) specifically responded to TDZ, and a co-expression network analysis (WGCNA) showed five hub TFs (GhNAC72, GhWRKY51, GhWRKY70, GhWRKY50, and GhHSF24) during chemical defoliation with TDZ. Our work sheds light on the molecular basis of TDZ-induced leaf abscission in cotton.
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Affiliation(s)
- Baopeng Liao
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
| | - Fangjun Li
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
| | - Fei Yi
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
| | - Mingwei Du
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
| | - Xiaoli Tian
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
| | - Zhaohu Li
- Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
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15
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Ma X, Xie X, He Z, Wang F, Fan R, Chen Q, Zhang H, Huang Z, Wu H, Zhao M, Li J. A LcDOF5.6-LcRbohD regulatory module controls the reactive oxygen species-mediated fruitlet abscission in litchi. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 113:954-968. [PMID: 36587275 DOI: 10.1111/tpj.16092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
Reactive oxygen species (ROS) have been emerging as a key regulator in plant organ abscission. However, the mechanism underlying the regulation of ROS homeostasis in the abscission zone (AZ) is not completely established. Here, we report that a DOF (DNA binding with one finger) transcription factor LcDOF5.6 can suppress the litchi fruitlet abscission through repressing the ROS accumulation in fruitlet AZ (FAZ). The expression of LcRbohD, a homolog of the Arabidopsis RBOHs that are critical for ROS production, was significantly increased during the litchi fruitlet abscission, in parallel with an increased accumulation of ROS in FAZ. In contrast, silencing of LcRbohD reduced the ROS accumulation in FAZ and decreased the fruitlet abscission in litchi. Using in vitro and in vivo assays, we revealed that LcDOF5.6 was shown to inhibit the expression of LcRbohD via direct binding to its promoter. Consistently, silencing of LcDOF5.6 increased the expression of LcRbohD, concurrently with higher ROS accumulation in FAZ and increased fruitlet abscission. Furthermore, the expression of key genes (LcIDL1, LcHSL2, LcACO2, LcACS1, and LcEIL3) in INFLORESCENCE DEFICIENT IN ABSCISSION signaling and ethylene pathways were altered in LcRbohD-silenced and LcDOF5.6-silenced FAZ cells. Taken together, our results demonstrate an important role of the LcDOF5.6-LcRbohD module during litchi fruitlet abscission. Our findings provide new insights into the molecular regulatory network of organ abscission.
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Affiliation(s)
- Xingshuai Ma
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Xianlin Xie
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Zidi He
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Fei Wang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Ruixin Fan
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Qingxin Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Hang Zhang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Zhiqiang Huang
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Hong Wu
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
| | - Minglei Zhao
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - Jianguo Li
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
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Tadeo FR, Agustí J, Merelo P, Talón M. Laser Microdissection: A High-Precision Approach to Isolate Specific Cell Types from Any Plant Species for Downstream Molecular Analyses. Methods Mol Biol 2023; 2642:365-373. [PMID: 36944888 DOI: 10.1007/978-1-0716-3044-0_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Plants display a great diversity of particular cell types that obviously perform functions and regulations that are essential for successful growth and development, whether under optimal or adverse conditions. The functions performed by each of these particular cell types must be associated with specific transcriptomic, proteomic, and metabolic profiles that cannot be disentangled by analyzing whole plant organs and tissues. Laser microdissection is a technique for the collection of specific cell types in plant organs and tissues comprising heterogeneous cell populations. It has been successfully used for physiological and molecular studies. Laser microdissection can be applied to any plant species as long as it is possible to reliably identify the cell types of interest. Here, we describe step by step, using citrus as a model plant, a fast, simple, easy to perform, and experimentally validated protocol to collect cells from the abscission zone, a specific tissue that is difficult to access and whose activity is important in the response of plants to adverse environmental conditions.
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Affiliation(s)
- Francisco R Tadeo
- Centro de Genómica, Instituto Valenciano de Investigaciones Agrarias, Moncada, Valencia, Spain.
| | - Javier Agustí
- Centro de Genómica, Instituto Valenciano de Investigaciones Agrarias, Moncada, Valencia, Spain
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Valencia, Spain
| | - Paz Merelo
- Centro de Genómica, Instituto Valenciano de Investigaciones Agrarias, Moncada, Valencia, Spain
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Valencia, Spain
| | - Manuel Talón
- Centro de Genómica, Instituto Valenciano de Investigaciones Agrarias, Moncada, Valencia, Spain
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17
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Jiang C, Liang Y, Deng S, Liu Y, Zhao H, Li S, Jiang CZ, Gao J, Ma C. The RhLOL1-RhILR3 module mediates cytokinin-induced petal abscission in rose. THE NEW PHYTOLOGIST 2023; 237:483-496. [PMID: 36263705 DOI: 10.1111/nph.18556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 10/08/2022] [Indexed: 06/16/2023]
Abstract
In many plant species, petal abscission can be considered the final step of petal senescence. Cytokinins (CKs) are powerful suppressors of petal senescence; however, their role in petal abscission is ambiguous. Here, we observed that, in rose (Rosa hybrida), biologically active CK is accumulated during petal abscission and acts as an accelerator of the abscission process. Using a combination of reverse genetics, and molecular and biochemical techniques, we explored the roles of a LESION SIMULATING DISEASE1 (LSD1) family member RhLOL1 interacting with a bHLH transcription factor RhILR3 in CK-induced petal abscission. Silencing RhLOL1 delays rose petal abscission, while the overexpression of its ortholog SlLOL1 in tomato (Solanum lycopersicum) promotes pedicel abscission, indicating the conserved function of LOL1 in activating plant floral organ abscission. In addition, we identify a bHLH transcription factor, RhILR3, that interacts with RhLOL1. We show that RhILR3 binds to the promoters of the auxin signaling repressor auxin/indole-3-acetic acid (Aux/IAA) genes to inhibit their expression; however, the interaction of RhLOL1 with RhILR3 activates the expression of the Aux/IAA genes including RhIAA4-1. Silencing RhIAA4-1 delays rose petal abscission. Our results thus reveal a RhLOL1-RhILR3 regulatory module involved in CK-induced petal abscission via the regulation of the expression of the Aux/IAA genes.
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Affiliation(s)
- Chuyan Jiang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yue Liang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Shuning Deng
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yang Liu
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Haohao Zhao
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Susu Li
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Cai-Zhong Jiang
- Crops Pathology and Genetic Research Unit, United States Department of Agriculture, Agricultural Research Service, Davis, CA, 95616, USA
- Department of Plant Sciences, University of California at Davis, Davis, CA, 95616, USA
| | - Junping Gao
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Chao Ma
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
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18
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RNA-Seq and Genome-Wide Association Studies Reveal Potential Genes for Rice Seed Shattering. Int J Mol Sci 2022; 23:ijms232314633. [PMID: 36498964 PMCID: PMC9736558 DOI: 10.3390/ijms232314633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/25/2022] Open
Abstract
The loss of the shattering ability is one of the key events in rice domestication. The strength of the seed shattering ability is closely related to the harvest yield and the adaptability of modern mechanical harvesting methods. In this study, using a population of 587 natural rice cultivars, quantitative trait loci associated with seed shattering were detected by genome-wide association studies (GWASs). We consider the quantitative trait loci (QTLs) qBTS1 and qBTS3 to be the key loci for seed shattering in rice. Additionally, the abscission zone (AZ) and nonabscission zone (NAZ) of materials with a loss of shattering (DZ129) and easy shattering (W517) were subjected to RNA-Seq, and high-quality differential expression profiles were obtained. The AZ-specific differentially expressed genes (DEGs) of W517 were significantly enriched in plant hormone signal transduction, while the AZ-specific DEGs of DZ129 were enriched in phenylpropanoid biosynthesis. We identified candidate genes for the lignin-associated laccase precursor protein (LOC_Os01g63180) and the glycoside hydrolase family (LOC_Os03g14210) in the QTLs qBTS1 (chromosome 1) and qBTS3 (chromosome 3), respectively. In summary, our findings lay the foundation for the further cloning of qBTS1 and qBTS3, which would provide new insights into seed shattering in rice.
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Cheng L, Li R, Wang X, Ge S, Wang S, Liu X, He J, Jiang CZ, Qi M, Xu T, Li T. A SlCLV3-SlWUS module regulates auxin and ethylene homeostasis in low light-induced tomato flower abscission. THE PLANT CELL 2022; 34:4388-4408. [PMID: 35972422 PMCID: PMC9614458 DOI: 10.1093/plcell/koac254] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/03/2022] [Indexed: 06/12/2023]
Abstract
Premature abscission of flowers and fruits triggered by low light stress can severely reduce crop yields. However, the underlying molecular mechanism of this organ abscission is not fully understood. Here, we show that a gene (SlCLV3) encoding CLAVATA3 (CLV3), a peptide hormone that regulates stem cell fate in meristems, is highly expressed in the pedicel abscission zone (AZ) in response to low light in tomato (Solanum lycopersicum). SlCLV3 knockdown and knockout lines exhibit delayed low light-induced flower drop. The receptor kinases SlCLV1 and BARELY ANY MERISTEM1 function in the SlCLV3 peptide-induced low light response in the AZ to decrease expression of the transcription factor gene WUSCHEL (SlWUS). DNA affinity purification sequencing identified the transcription factor genes KNOX-LIKE HOMEDOMAIN PROTEIN1 (SlKD1) and FRUITFULL2 (SlFUL2) as SlWUS target genes. Our data reveal that low light reduces SlWUS expression, resulting in higher SlKD1 and SlFUL2 expression in the AZ, thereby perturbing the auxin response gradient and causing increased ethylene production, eventually leading to the initiation of abscission. These results demonstrate that the SlCLV3-SlWUS signaling pathway plays a central role in low light-induced abscission by affecting auxin and ethylene homeostasis.
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Affiliation(s)
- Lina Cheng
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Ruizhen Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Xiaoyang Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Siqi Ge
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Sai Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Xianfeng Liu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Jing He
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Cai-Zhong Jiang
- Crops Pathology and Genetic Research Unit, United States Department of Agriculture Agricultural Research Service, Albany, California 95616, USA
- Department of Plant Sciences, University of California, Los Angeles, California 95616, USA
| | - Mingfang Qi
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Tao Xu
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
| | - Tianlai Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, China
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20
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Jiang C, Jiang T, Deng S, Yuan C, Liang Y, Li S, Ma C, Gao Y. Integrative analysis of transcriptome, proteome, and ubiquitome changes during rose petal abscission. FRONTIERS IN PLANT SCIENCE 2022; 13:1041141. [PMID: 36340335 PMCID: PMC9627506 DOI: 10.3389/fpls.2022.1041141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Plant organ abscission is regulated by multiple physiological and biochemical processes. However, the transcriptional, translational, and post-translational modifications occurring during organ abscission have not been systematically investigated. In this study, we report transcriptome, proteome, and ubiquitome data for the abscission zone (AZ) of rose petals collected during petal shedding. We quantified 40,506 genes, 6,595 proteins, and 2,720 ubiquitinated proteins in rose petal AZ. Our results showed that during petal abscission, 1,496 genes were upregulated and 2,199 were downregulated; 271 proteins were upregulated and 444 were downregulated; and 139 ubiquitination sites in 100 proteins were upregulated and 55 ubiquitination sites in 48 proteins were downregulated. Extracellular levels of cell component proteins were significantly increased, while levels within protoplasts were significantly decreased. During petal abscission, transcript levels of genes involved in defense response, transport, and metabolism changed significantly. Levels of proteins involved in the starch and sucrose metabolism and phenylpropanoid biosynthesis pathways were significantly altered at both the transcript and protein levels. The transcriptional and translational upregulation of peroxidase (POD), in the phenylpropanoid biosynthesis, pathway may be associated with deposition of lignin, which forms a protective layer during petal abscission. Overall, our data provide a comprehensive assessment of the translational and post-translational changes that occur during rose petal abscission.
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Affiliation(s)
- Chuyan Jiang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Tianhua Jiang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Shuning Deng
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Chaoli Yuan
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing, China
| | - Yue Liang
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Susu Li
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Chao Ma
- Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Yuerong Gao
- Beijing Key Laboratory for Agricultural Application and New Technique, College of Plant Science and Technology, Beijing University of Agriculture, Beijing, China
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21
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Crick J, Corrigan L, Belcram K, Khan M, Dawson JW, Adroher B, Li S, Hepworth SR, Pautot V. Floral organ abscission in Arabidopsis requires the combined activities of three TALE homeodomain transcription factors. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:6150-6169. [PMID: 35689803 DOI: 10.1093/jxb/erac255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Floral organ abscission is a separation process in which sepals, petals, and stamens detach from the plant at abscission zones. Here, we investigated the collective role of three amino-acid-loop-extension (TALE) homeobox genes ARABIDOPSIS THALIANA HOMEOBOX GENE1 (ATH1), KNAT6 (for KNOTTED LIKE from Arabidopsis thaliana) and KNAT2, which form a module that patterns boundaries under the regulation of BLADE-ON-PETIOLE 1 and 2 (BOP1/2) co-activators. These TALE homeodomain transcription factors were shown to maintain boundaries in the flower, functioning as a unit to coordinate the growth, patterning, and activity of abscission zones. Together with BOP1 and BOP2, ATH1 and its partners KNAT6 and KNAT2 collectively contribute to the differentiation of lignified and separation layers of the abscission zone. The genetic interactions of BOP1/2 and ATH1 with INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) were also explored. We showed that BOP1/2 co-activators and ATH1 converge with the IDA signalling pathway to promote KNAT6 and KNAT2 expression in the abscission zone and cell separation. ATH1 acts as a central regulator in floral organ abscission as it controls the expression of other TALE genes in abscission zone cells.
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Affiliation(s)
- Jennifer Crick
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Laura Corrigan
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Katia Belcram
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
| | - Madiha Khan
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Jeff W Dawson
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Bernard Adroher
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
| | - Sibei Li
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | | | - Véronique Pautot
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), Versailles, France
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22
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Li J, Jia X, Yang Y, Chen Y, Wang L, Liu L, Li M. Genome-Wide Identification of the DOF Gene Family Involved in Fruitlet Abscission in Areca catechu L. Int J Mol Sci 2022; 23:ijms231911768. [PMID: 36233072 PMCID: PMC9569674 DOI: 10.3390/ijms231911768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/23/2022] [Accepted: 09/30/2022] [Indexed: 11/16/2022] Open
Abstract
Fruitlet abscission frequently occurs in Areca catechu L. and causes considerable production loss. However, the inducement mechanism of fruitlet abscission remains mysterious. In this study, we observed that the cell architecture in the abscission zone (AZ) was distinct with surrounding tissues, and varied obviously before and after abscission. Transcriptome analysis of the “about-to-abscise” and “non-abscised” AZs were performed in A. catechu, and the genes encoding the plant-specific DOF (DNA-binding with one finger) transcription factors showed a uniform up-regulation in AZ, suggesting a role of the DOF transcription in A. catechu fruitlet abscission. In total, 36 members of the DOF gene family distributed in 13 chromosomes were identified from the A. catechu genome. The 36 AcDOF genes were classified into nine subgroups based on phylogenic analysis. Six of them showed an AZ-specific expression pattern, and their expression levels varied according to the abscission process. In total, nine types of phytohormone response cis-elements and five types of abiotic stress related cis-elements were identified in the promoter regions of the AcDOF genes. In addition, histochemical staining showed that lignin accumulation of vascular bundles in AZ was significantly lower than that in pedicel and mesocarp, indicating the specific characteristics of the cell architecture in AZ. Our data suggests that the DOF transcription factors might play a role in fruitlet abscission regulation in A. catechu.
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Affiliation(s)
- Jia Li
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Xiaocheng Jia
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Yaodong Yang
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Yunche Chen
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
- College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Linkai Wang
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Liyun Liu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, China
| | - Meng Li
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
- Correspondence: ; Tel.: +86-13319516033
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23
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Wang X, Wang Y, Yan S, Sun X, Liu H, Cheng B, Xu X, Wei Z, Zhang G. A multifaceted comparison between the fruit-abscission and fruit-retention cultivars in ornamental crabapple. FRONTIERS IN PLANT SCIENCE 2022; 13:1013263. [PMID: 36212288 PMCID: PMC9535355 DOI: 10.3389/fpls.2022.1013263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 08/17/2022] [Indexed: 06/16/2023]
Abstract
The ornamental crabapple is a multipurpose landscaping tree that bears brilliant fruit throughout the winter. However, whether or not its fruit persists after maturation is specifically correlated to cultivar characteristics. In this work, we screened two different types that display fruit-retention ("Donald Wyman," "Red Jewel," and "Sugar Tyme") and fruit-abscission ("Radiant" and "Flame") in Northern China across the whole winter using multi-year successional records. Fruit-abscission was determined predominantly by the abscission zone established at the base of the pedicel, regardless of fruit size and pedicel length, according to the results of the comparative research. The primary physiological rationale was the accumulation of hydrolases activity (pectinesterase, cellulase, polygalacturonase, and β-glucosidase). Comparative transcriptomics further identified a number of upregulated DEGs involved in the synthesis pathways of canonical phytohormones, such as ethylene, jasmonic acid, abscisic acid, and cytokinin, as well as 12 transcription factors linked in downstream signaling in fruit-abscission cultivars. Finally, a model incorporating multi-layered modulation was proposed for the fruit abscission of ornamental crabapple. This study will serve as the foundation for the development of fruit-viewing crabapples that have an extended ornamental lifetime.
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Affiliation(s)
- Xue Wang
- College of Horticultural Science and Technology, Hebei Key Laboratory of Horticultural Germplasm Excavation and Innovative Utilization, Hebei Normal University of Science and Technology, Qinhuangdao, China
- Institute of Grassland Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Yi Wang
- College of Horticulture, China Agricultural University, Beijing, China
| | - Shufang Yan
- Hebei Academy of Forestry and Grassland Sciences, Hebei Forest City Construction Technology Innovation Center, Shijiazhuang, China
| | - Xuan Sun
- Institute of Grassland Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Hongyan Liu
- Institute of Grassland Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Beibei Cheng
- College of Horticultural Science and Technology, Hebei Key Laboratory of Horticultural Germplasm Excavation and Innovative Utilization, Hebei Normal University of Science and Technology, Qinhuangdao, China
| | - Xingxing Xu
- College of Horticultural Science and Technology, Hebei Key Laboratory of Horticultural Germplasm Excavation and Innovative Utilization, Hebei Normal University of Science and Technology, Qinhuangdao, China
| | - Zunzheng Wei
- Institute of Grassland Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Guojun Zhang
- College of Horticultural Science and Technology, Hebei Key Laboratory of Horticultural Germplasm Excavation and Innovative Utilization, Hebei Normal University of Science and Technology, Qinhuangdao, China
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24
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Lee J, Chen H, Lee G, Emonet A, Kim S, Shim D, Lee Y. MSD2-mediated ROS metabolism fine-tunes the timing of floral organ abscission in Arabidopsis. THE NEW PHYTOLOGIST 2022; 235:2466-2480. [PMID: 35689444 PMCID: PMC9543660 DOI: 10.1111/nph.18303] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 05/27/2022] [Indexed: 06/14/2023]
Abstract
The timely removal of end-of-purpose flowering organs is as essential for reproduction and plant survival as timely flowering. Despite much progress in understanding the molecular mechanisms of floral organ abscission, little is known about how various environmental factors are integrated into developmental programmes that determine the timing of abscission. Here, we investigated whether reactive oxygen species (ROS), mediators of various stress-related signalling pathways, are involved in determining the timing of abscission and, if so, how they are integrated with the developmental pathway in Arabidopsis thaliana. MSD2, encoding a secretory manganese superoxide dismutase, was preferentially expressed in the abscission zone of flowers, and floral organ abscission was accelerated by the accumulation of ROS in msd2 mutants. The expression of the genes encoding the receptor-like kinase HAESA (HAE) and its cognate peptide ligand INFLORESCENCE DEFICIENT IN ABSCISSION (IDA), the key signalling components of abscission, was accelerated in msd2 mutants, suggesting that MSD2 acts upstream of IDA-HAE. Further transcriptome and pharmacological analyses revealed that abscisic acid and nitric oxide facilitate abscission by regulating the expression of IDA and HAE during MSD2-mediated signalling. These results suggest that MSD2-dependent ROS metabolism is an important regulatory point integrating environmental stimuli into the developmental programme leading to abscission.
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Affiliation(s)
- Jinsu Lee
- Research Institute of Basic SciencesSeoul National UniversitySeoul08826Korea
- Research Centre for Plant PlasticitySeoul National UniversitySeoul08826Korea
| | - Huize Chen
- Research Institute of Basic SciencesSeoul National UniversitySeoul08826Korea
- Higher Education Key Laboratory of Plant Molecular and Environmental Stress Response in Shanxi ProvinceShanxi Normal UniversityTaiyuan030000ShanxiChina
| | - Gisuk Lee
- Department of Biological SciencesKorea Advanced Institute for Science and TechnologyDaejeon34141Korea
| | - Aurélia Emonet
- Department of Plant Molecular BiologyUniversity of Lausanne1015LausanneSwitzerland
| | - Sang‐Gyu Kim
- Department of Biological SciencesKorea Advanced Institute for Science and TechnologyDaejeon34141Korea
| | - Donghwan Shim
- Department of Biological SciencesChungnam National UniversityDaejeon34134Korea
| | - Yuree Lee
- Research Centre for Plant PlasticitySeoul National UniversitySeoul08826Korea
- School of Biological SciencesSeoul National UniversitySeoul08826Korea
- Plant Genomics and Breeding InstituteSeoul National UniversitySeoul08826Korea
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25
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Guo C, Li X, Zhang Z, Wang Q, Zhang Z, Wen L, Liu C, Deng Z, Chu Y, Liu T, Guo Y. The INFLORESCENCE DEFICIENT IN ABSCISSION-LIKE6 Peptide Functions as a Positive Modulator of Leaf Senescence in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2022; 13:909378. [PMID: 35845701 PMCID: PMC9280484 DOI: 10.3389/fpls.2022.909378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Leaf senescence is a highly coordinated process and has a significant impact on agriculture. Plant peptides are known to act as important cell-to-cell communication signals that are involved in multiple biological processes such as development and stress responses. However, very limited number of peptides has been reported to be associated with leaf senescence. Here, we report the characterization of the INFLORESCENCE DEFICIENT IN ABSCISSION-LIKE6 (IDL6) peptide as a regulator of leaf senescence. The expression of IDL6 was up-regulated in senescing leaves. Exogenous application of synthetic IDL6 peptides accelerated the process of leaf senescence. The idl6 mutant plants showed delayed natural leaf senescence as well as senescence included by darkness, indicating a regulatory role of IDL6 peptides in leaf senescence. The role of IDL6 as a positive regulator of leaf senescence was further supported by the results of overexpression analysis and complementation test. Transcriptome analysis revealed differential expression of phytohormone-responsive genes in idl6 mutant plants. Further analysis indicated that altered expression of IDL6 led to changes in leaf senescence phenotypes induced by ABA and ethylene treatments. The results from this study suggest that the IDL6 peptide positively regulates leaf senescence in Arabidopsis thaliana.
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Affiliation(s)
- Cun Guo
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoxu Li
- Technology Center, China Tobacco Hunan Industrial Co., Ltd., Changsha, China
| | - Zenglin Zhang
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
| | - Qi Wang
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
| | - Zhenbiao Zhang
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lichao Wen
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Cheng Liu
- QuJing Tobacco Company, Qujing, China
| | - Zhichao Deng
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yumeng Chu
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
| | - Tao Liu
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yongfeng Guo
- Chinese Academy of Agricultural Sciences, Tobacco Research Institute, Qingdao, China
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Liu D, Guo T, Li J, Hao Y, Zhao D, Wang L, Liu Z, Zhang L, Jin Z, Pei Y. Hydrogen sulfide inhibits the abscission of tomato pedicel through reconstruction of a basipetal auxin gradient. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 318:111219. [PMID: 35351302 DOI: 10.1016/j.plantsci.2022.111219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 01/12/2022] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Abscission is an important developmental process and an essential agricultural trait. Auxin and ethylene are two phytohormones with important roles in the complex, but still elusive signaling network of abscission. Here, we found that hydrogen sulfide (H2S), a newly identified gasotransmitter, inhibits the initiation of tomato pedicel abscission. The underlying mechanism was explored through transcriptome profile analysis in various pedicel tissues with or without H2S treatment in the early abscission stage. The data suggested that H2S strongly influences the global transcription of pedicel tissues, exerts differential expression regulation along the pedicel, and markedly influences both the auxin and ethylene signaling pathways. Computational analysis revealed that H2S reconstructs a basipetal auxin gradient along the pedicel at 4 h after treatment; this finding was further substantiated by the GUS-staining results of DR5::GUS pedicels. The inhibitory effect of H2S to the ethylene signaling pathway might be an indirect action. Moreover, the subtilisin-like proteinase family members involved in the release of peptide signal molecules are critical components of the abscission signaling network downstream of auxin and ethylene.
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Affiliation(s)
- Danmei Liu
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Ting Guo
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Jianing Li
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Yuan Hao
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Dan Zhao
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Longdan Wang
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Zhiqiang Liu
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Liping Zhang
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Zhuping Jin
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China
| | - Yanxi Pei
- School of Life Science, Shanxi University, Taiyuan 030006, China; Shanxi Key Laboratory for Research and Development of Regional Plants, Taiyuan 030006, China.
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Kućko A, de Dios Alché J, Tranbarger TJ, Wilmowicz E. The acceleration of yellow lupine flower abscission by jasmonates is accompanied by lipid-related events in abscission zone cells. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 316:111173. [PMID: 35151456 DOI: 10.1016/j.plantsci.2021.111173] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Yellow lupine is an economically important crop. This species has been used as a great model for abscission processes for several years due to extreme flower abortion, which takes place in the abscission zone (AZ). AZ activation involves modifications of cell walls, membranes, and cellular structure. In this paper, we applied physiological, molecular, biochemical, and instrumental methods to explore lipid-associated changes and the possible involvement of lipid-derived phytohormones - jasmonates (JAs) - in flower AZ activation. Our comprehensive analyses revealed that natural abscission is accompanied by the upregulation of peroxidase, which reflects a disruption of redox balance and/or lipids peroxidation in AZ cell membranes. Redox imbalance was confirmed by appearance of malondialdehyde. Lipid-related processes involved the specific localization and increased level and activity of lipase and LOX, enzymes associated with cell membrane rupture, and JA biosynthesis. Lipid-hydrolyzing phospholipase D, implicated previously in abscission, is also found in naturally active AZs. Observed changes are accompanied by the accumulation of jasmonates, both free jasmonic acid and its methyl ester. The JA derivative exhibited higher biological activity than the nonconjugated form. Overall, our study shed new light on the lipid and phytohormonal regulation of AZ functioning supporting a role of JAs during abscission-associated events.
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Affiliation(s)
- Agata Kućko
- Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.
| | - Juan de Dios Alché
- Plant Reproductive Biology and Advanced Microscopy Laboratory, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008, Granada, Spain.
| | - Timothy John Tranbarger
- UMR DIADE, IRD Centre de Montpellier, Institut de Recherche pour le Développement, Université de Montpellier, 911 Avenue Agropolis BP 64501, 34394 CEDEX 5, Montpellier, France.
| | - Emilia Wilmowicz
- Chair of Plant Physiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 1 Lwowska Street, 87-100, Toruń, Poland.
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Fu M, Bai Q, Zhang H, Guo Y, Peng Y, Zhang P, Shen L, Hong N, Xu W, Wang G. Transcriptome Analysis of the Molecular Patterns of Pear Plants Infected by Two Colletotrichum fructicola Pathogenic Strains Causing Contrasting Sets of Leaf Symptoms. FRONTIERS IN PLANT SCIENCE 2022; 13:761133. [PMID: 35251071 PMCID: PMC8888856 DOI: 10.3389/fpls.2022.761133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Colletotrichum fructicola infects pear leaves, resulting in two major symptoms: tiny black spots (TS) followed by severe early defoliation and big necrotic lesions (BnL) without apparent damage depending on the pathotypes. How the same fungal species causes different symptoms remains unclear. To understand the molecular mechanism underlying the resulting diseases and the diverse symptoms, two C. fructicola pathogenetic strains (PAFQ31 and PAFQ32 responsible for TS and BnL symptoms, respectively) were inoculated on Pyrus pyrifolia leaves and subjected to transcriptome sequencing at the quiescent stage (QS) and necrotrophic stage (NS), respectively. In planta, the genes involved in the salicylic acid (SA) signaling pathway were upregulated at the NS caused by the infection of each strain. In contrast, the ethylene (ET), abscisic acid (ABA), and jasmonic acid (JA) signaling pathways were specifically related to the TS symptoms caused by the infection of strain PAFQ31, corresponding to the yellowish and early defoliation symptoms triggered by the strain infection. Correspondingly, SA was accumulated in similar levels in the leaves infected by each strain at NS, but JA was significantly higher in the PAFQ31-infected as measured using high-performance liquid chromatography. Weighted gene co-expression network analysis also reveals specific genes, pathways, phytohormones, and transcription factors (TFs) associated with the PAFQ31-associated early defoliation. Taken together, these data suggest that specific metabolic pathways were regulated in P. pyrifolia in response to the infection of two C. fructicola pathotypes resulting in the diverse symptoms: JA, ET, and ABA accumulated in the PAFQ31-infected leaves, which negatively affected the chlorophyll metabolism and photosynthesis pathways while positively affecting the expression of senescence-associated TFs and genes, resulted in leaf yellowing and defoliation; whereas SA inhibited JA-induced gene expression in the PAFQ32-infected leaves, which led to hypersensitive response-like reaction and BnL symptoms.
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Affiliation(s)
- Min Fu
- Hubei Hongshan Laboratory, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Wuhan, China
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
- Hubei Key Laboratory of Plant Pathology, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Qing Bai
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hui Zhang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yashuang Guo
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yuhong Peng
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Pengfei Zhang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Liang Shen
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ni Hong
- State Key Laboratory of Agricultural Microbiology, Wuhan, China
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
- Hubei Key Laboratory of Plant Pathology, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wenxing Xu
- Hubei Hongshan Laboratory, Wuhan, China
- State Key Laboratory of Agricultural Microbiology, Wuhan, China
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
- Hubei Key Laboratory of Plant Pathology, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Guoping Wang
- State Key Laboratory of Agricultural Microbiology, Wuhan, China
- Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
- Hubei Key Laboratory of Plant Pathology, Wuhan, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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Li Q, Chai L, Tong N, Yu H, Jiang W. Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower. Int J Mol Sci 2022; 23:ijms23041952. [PMID: 35216070 PMCID: PMC8876634 DOI: 10.3390/ijms23041952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/29/2022] [Accepted: 01/31/2022] [Indexed: 11/16/2022] Open
Abstract
Tomato flower abscission is a critical agronomic problem directly affecting yield. It often occurs in greenhouses in winter, with the weak light or hazy weather leading to insufficient photosynthates. The importance of carbohydrate availability in flower retention has been illustrated, while relatively little is understood concerning the mechanism of carbohydrate regulation on flower abscission. In the present study, we analyzed the responding pattern of nonstructural carbohydrates (NSC, including total soluble sugars and starch) and the potential sugar signal pathway involved in abscission regulation in tomato flowers under shading condition, and their correlations with flower abscission rate and abscission-related hormones. The results showed that, when plants suffer from short-term photosynthesis deficiency, starch degradation in flower organs acts as a self-protection mechanism, providing a carbon source for flower growth and temporarily alleviating the impact on flower development. Trehalose 6-phosphate (T6P) and sucrose non-fermenting-like kinase (SnRK1) signaling seems to be involved in adapting the metabolism to sugar starvation stress through regulating starch remobilization and crosstalk with IAA, ABA, and ethylene in flowers. However, a continuous limitation of assimilating supply imposed starch depletion in flowers, which caused flower abscission.
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Affiliation(s)
| | | | | | - Hongjun Yu
- Correspondence: (H.Y.); (W.J.); Tel.: +86-10-8210-8797 (H.Y. & W.J.)
| | - Weijie Jiang
- Correspondence: (H.Y.); (W.J.); Tel.: +86-10-8210-8797 (H.Y. & W.J.)
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Ma X, Ying P, He Z, Wu H, Li J, Zhao M. The LcKNAT1-LcEIL2/3 Regulatory Module Is Involved in Fruitlet Abscission in Litchi. FRONTIERS IN PLANT SCIENCE 2022; 12:802016. [PMID: 35126427 PMCID: PMC8813966 DOI: 10.3389/fpls.2021.802016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/15/2021] [Indexed: 06/12/2023]
Abstract
Large and premature organ abscission may limit the industrial development of fruit crops by causing serious economic losses. It is well accepted that ethylene (ET) is a strong inducer of organ abscission in plants. However, the mechanisms underlying the control of organ abscission by ET are largely unknown. We previously revealed that LcKNAT1, a KNOTTED-LIKE FROM ARABIDOPSIS THALIANA1 (KNAT1)-like protein, acted as a negative regulator in control of fruitlet abscission through suppressing the expression of ET biosynthetic genes in litchi. In this study, we further reported that LcKNAT1 could also directly repress the transcription of LcEIL2 and LcEIL3, two ETHYLENE INSENSITIVE 3-like (EIL) homologs in litchi, which functioned as positive regulators in ET-activated fruitlet abscission by directly promoting the expression of genes responsible for ET biosynthesis and cell wall degradation. The expression level of LcKNAT1 was downregulated, while LcEIL2/3 was upregulated at the abscission zone (AZ) accompanying the fruitlet abscission in litchi. The results of electrophoretic mobility shift assays (EMSAs) and transient expression showed that LcKNAT1 could directly bind to the promoters of LcEIL2 and LcEIL3 and repress their expression. Furthermore, the genetic cross demonstrated that the β-glucuronidase (GUS) expression driven by the promoters of LcEIL2 or LcEIL3 at the floral AZ was obviously suppressed by LcKNAT1 under stable transformation in Arabidopsis. Taken together, our findings suggest that the LcKNAT1-LcEIL2/3 regulatory module is likely involved in the fruitlet abscission in litchi, and we propose that LcKNAT1 could suppress both ET biosynthesis and signaling to regulate litchi fruit abscission.
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Affiliation(s)
- Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Peiyuan Ying
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Zidi He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Hong Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (South China), Ministry of Agriculture and Rural Affairs, Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University, Guangzhou, China
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Yan N, Yang T, Yu XT, Shang LG, Guo DP, Zhang Y, Meng L, Qi QQ, Li YL, Du YM, Liu XM, Yuan XL, Qin P, Qiu J, Qian Q, Zhang ZF. Chromosome-level genome assembly of Zizania latifolia provides insights into its seed shattering and phytocassane biosynthesis. Commun Biol 2022; 5:36. [PMID: 35017643 PMCID: PMC8752815 DOI: 10.1038/s42003-021-02993-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 12/21/2021] [Indexed: 12/25/2022] Open
Abstract
Chinese wild rice (Zizania latifolia; family: Gramineae) is a valuable medicinal homologous grain in East and Southeast Asia. Here, using Nanopore sequencing and Hi-C scaffolding, we generated a 547.38 Mb chromosome-level genome assembly comprising 332 contigs and 164 scaffolds (contig N50 = 4.48 Mb; scaffold N50 = 32.79 Mb). The genome harbors 38,852 genes, with 52.89% of the genome comprising repetitive sequences. Phylogenetic analyses revealed close relation of Z. latifolia to Leersia perrieri and Oryza species, with a divergence time of 19.7-31.0 million years. Collinearity and transcriptome analyses revealed candidate genes related to seed shattering, providing basic information on abscission layer formation and degradation in Z. latifolia. Moreover, two genomic blocks in the Z. latifolia genome showed good synteny with the rice phytocassane biosynthetic gene cluster. The updated genome will support future studies on the genetic improvement of Chinese wild rice and comparative analyses between Z. latifolia and other plants.
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Affiliation(s)
- Ning Yan
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China.
| | - Ting Yang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Xiu-Ting Yu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Lian-Guang Shang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
| | - De-Ping Guo
- Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yu Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Lin Meng
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Qian-Qian Qi
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Ya-Li Li
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yong-Mei Du
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Xin-Min Liu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Xiao-Long Yuan
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
| | - Peng Qin
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jie Qiu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Qian Qian
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310006, China.
| | - Zhong-Feng Zhang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China.
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Comparative Analysis of the Transcriptomes of Persisting and Abscised Fruitlets: Insights into Plant Hormone and Carbohydrate Metabolism Regulated Self-Thinning of Pecan Fruitlets during the Early Stage. Curr Issues Mol Biol 2021; 44:176-193. [PMID: 35723392 PMCID: PMC8929008 DOI: 10.3390/cimb44010013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 11/17/2022] Open
Abstract
Pecan is one of the most popular nut species in the world. The fruit drop rate of the pecan ‘Pawnee’ is more than 57%, with four fruit drop stages, which is very serious. In this study, we conducted transcriptomic profiling of persisting and abscised fruitlets in early fruit development by RNA-seq. A total of 11,976 differentially expressed genes (DEGs) were identified, 3012 upregulated and 8964 downregulated, in a comparison of abscised vs. persisting fruitlets at 35 days after anthesis (DAA). Our transcriptomic data suggest that gene subsets encoding elements involving the biosynthesis, metabolism, perception, signal transduction, and crosstalk of the plant hormones abscisic acid (ABA), auxin, cytokinin, ethylene, and gibberellin (GA) and plant growth regulators jasmonates, salicylic acid, and brassinosteroids were differentially expressed. In addition, the majority of transcriptionally activated genes involved in hormone signaling (except for ethylene and salicylic acid signaling) were downregulated in abscised fruitlets. The differential expression of transcripts coding for enzymes involved in sucrose, glucose, trehalose, starch, galactose, and galactinol metabolism shows that sucrose, galactinol, and glucose synthesis and starch content were reduced as starch biosynthesis was blocked, and retrogradation and degradation intensified. These results suggest that the abscised pecan fruitlets stopped growing and developing for some time before dropping, further indicating that their sugar supply was reduced or stopped. The transcriptome characterization described in this paper contributes to unravelling the molecular mechanisms and pathways involved in the physiological abscission of pecan fruits.
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Sundaresan S, Philosoph-Hadas S, Ma C, Jiang CZ, Riov J, Kochanek B, Salim S, Reid MS, Meir S. Role of the KNOTTED1-LIKE HOMEOBOX protein (KD1) in regulating abscission of tomato flower pedicels at early and late stages of the process. PHYSIOLOGIA PLANTARUM 2021; 173:2103-2118. [PMID: 34545591 DOI: 10.1111/ppl.13560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/06/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
The KNOTTED1-LIKE HOMEOBOX PROTEIN1 (KD1) gene is highly expressed in flower and leaf abscission zones (AZs), and KD1 was reported to regulate tomato flower pedicel abscission via alteration of the auxin gradient and response in the flower AZ (FAZ). The present work was aimed to further examine how KD1 regulates signaling factors and regulatory genes involved in pedicel abscission, by using silenced KD1 lines and performing a large-scale transcriptome profiling of the FAZ before and after flower removal, using a customized AZ-specific microarray. The results highlighted a differential expression of regulatory genes in the FAZ of KD1-silenced plants compared to the wild-type. In the TAPG4::antisense KD1-silenced plants, KD1 gene expression decreased before flower removal, resulting in altered expression of regulatory genes, such as epigenetic modifiers, transcription factors, posttranslational regulators, and antioxidative defense factors occurring at zero time and before affecting auxin levels in the FAZ detected at 4 h after flower removal. The expression of additional regulatory genes was altered in the FAZ of KD1-silenced plants at 4-20 h after flower removal, thereby leading to an inhibited abscission phenotype, and downregulation of genes involved in abscission execution and defense processes. Our data suggest that KD1 is a master regulator of the abscission process, which promotes abscission of tomato flower pedicels. This suggestion is based on the inhibitory effect of KD1 silencing on flower pedicel abscission that operates via alteration of various regulatory pathways, which delay the competence acquisition of the FAZ cells to respond to ethylene signaling.
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Affiliation(s)
- Srivignesh Sundaresan
- Department of Postharvest Science, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZiyon, Israel
- Department of Horticulture, Neelakudi Campus, School of Life Sciences, Central University of Tamil Nadu (CUTN), Thiruvarur, India
| | - Sonia Philosoph-Hadas
- Department of Postharvest Science, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZiyon, Israel
| | - Chao Ma
- State Key Laboratory of Agrobiotechnology, Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing, China
| | - Cai-Zhong Jiang
- Crops Pathology and Genetic Research Unit, USDA-ARS, Davis, California, USA
- Department of Plant Sciences, University of California at Davis, Davis, California, USA
| | - Joseph Riov
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Betina Kochanek
- Department of Postharvest Science, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZiyon, Israel
| | - Shoshana Salim
- Department of Postharvest Science, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZiyon, Israel
| | - Michael S Reid
- Department of Plant Sciences, University of California at Davis, Davis, California, USA
| | - Shimon Meir
- Department of Postharvest Science, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZiyon, Israel
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34
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Sun W, Li Z, Xiang S, Ni L, Zhang D, Chen D, Qiu M, Zhang Q, Xiao L, Din L, Li Y, Liao X, Liu X, Jiang Y, Zhang P, Ni H, Wang Y, Yue Y, Wu X, Din X, Huang W, Wang Z, Ma X, Liu B, Zou X, Van de Peer Y, Liu Z, Zou S. The Euscaphis japonica genome and the evolution of malvids. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 108:1382-1399. [PMID: 34587334 PMCID: PMC9298382 DOI: 10.1111/tpj.15518] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Malvids is one of the largest clades of rosids, includes 58 families and exhibits remarkable morphological and ecological diversity. Here, we report a high-quality chromosome-level genome assembly for Euscaphis japonica, an early-diverging species within malvids. Genome-based phylogenetic analysis suggests that the unstable phylogenetic position of E. japonica may result from incomplete lineage sorting and hybridization event during the diversification of the ancestral population of malvids. Euscaphis japonica experienced two polyploidization events: the ancient whole genome triplication event shared with most eudicots (commonly known as the γ event) and a more recent whole genome duplication event, unique to E. japonica. By resequencing 101 samples from 11 populations, we speculate that the temperature has led to the differentiation of the evergreen and deciduous of E. japonica and the completely different population histories of these two groups. In total, 1012 candidate positively selected genes in the evergreen were detected, some of which are involved in flower and fruit development. We found that reddening and dehiscence of the E. japonica pericarp and long fruit-hanging time promoted the reproduction of E. japonica populations, and revealed the expression patterns of genes related to fruit reddening, dehiscence and abscission. The key genes involved in pentacyclic triterpene synthesis in E. japonica were identified, and different expression patterns of these genes may contribute to pentacyclic triterpene diversification. Our work sheds light on the evolution of E. japonica and malvids, particularly on the diversification of E. japonica and the genetic basis for their fruit dehiscence and abscission.
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Ma X, Li C, Yuan Y, Zhao M, Li J. Xyloglucan endotransglucosylase/hydrolase genes LcXTH4/7/19 are involved in fruitlet abscission and are activated by LcEIL2/3 in litchi. PHYSIOLOGIA PLANTARUM 2021; 173:1136-1146. [PMID: 34302699 DOI: 10.1111/ppl.13509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 06/23/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Organ abscission in plants requires the hydrolysis of cell wall components, mainly including celluloses, pectins, and xyloglucans. However, how the genes that encode those hydrolytic enzymes are regulated and their function in abscission remains unclear. Previously we revealed that two cellulase genes LcCEL2/8 and two polygalacturonase genes LcPG1/2 were responsible for the degradation of celluloses and pectins, respectively, during fruitlet abscission in litchi. Here, we further identified three xyloglucan endotransglucosylase/hydrolase genes (LcXTH4, LcXTH7, LcXTH19) that are also involved in this process. Nineteen LcXTHs, named LcXTH1-19, were identified in the litchi genome. Transcriptome data and qRT-PCR confirmed that LcXTH4/7/19 were significantly induced at the abscission zone (AZ) during fruitlet abscission in litchi. The GUS reporter driven by each promoter of LcXTH4/7/19 was specifically expressed at the floral abscission zone of Arabidopsis, and importantly ectopic expression of LcXTH19 in Arabidopsis resulted in precocious floral organ abscission. Moreover, electrophoretic mobility shift assay (EMSA) and dual-luciferase reporter analysis showed that the expression of LcXTH4/7/19 could be directly activated by two ETHYLENE INSENSITIVE 3-like (EIL) transcription factors LcEIL2/3. Collectively, we propose that LcXTH4/7/19 are involved in fruitlet abscission, and LcEIL2/3-mediated transcriptional regulation of diverse cell wall hydrolytic genes is responsible for this process in litchi.
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Affiliation(s)
- Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Caiqin Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Ye Yuan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
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Morcillo F, Serret J, Beckers A, Collin M, Tisné S, George S, Poveda R, Louise C, Tranbarger TJ. A Non-Shedding Fruit Elaeis oleifera Palm Reveals Perturbations to Hormone Signaling, ROS Homeostasis, and Hemicellulose Metabolism. Genes (Basel) 2021; 12:1724. [PMID: 34828330 PMCID: PMC8621672 DOI: 10.3390/genes12111724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
The developmentally programmed loss of a plant organ is called abscission. This process is characterized by the ultimate separation of adjacent cells in the abscission zone (AZ). The discovery of an American oil palm (Elaeis oleifera) variant that does not shed its has allowed for the study of the mechanisms of ripe fruit abscission in this species. A comparative transcriptome analysis was performed to compare the fruit AZs of the non-shedding E. oleifera variant to an individual of the same progeny that sheds its ripe fruit normally. The study provides evidence for widespread perturbation to gene expression in the AZ of the non-shedding variant, compared to the normal fruit-shedding control, and offers insight into abscission-related functions. Beyond the genes with known or suspected roles during organ abscission or indehiscence that were identified, a list of genes with hormone-related functions, including ethylene, jasmonic acid, abscisic acid, cytokinin and salicylic acid, in addition to reactive oxygen species (ROS) metabolism, transcriptional responses and signaling pathways, was compiled. The results also allowed a comparison between the ripe fruit abscission processes of the African and American oil palm species at the molecular level and revealed commonalities with environmental stress pathways.
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Affiliation(s)
- Fabienne Morcillo
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
- CIRAD, UMR (Unité Mixte de Recherche) DIADE, 34398 Montpellier, France
| | - Julien Serret
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Antoine Beckers
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Myriam Collin
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
| | - Sebastien Tisné
- CIRAD, UMR AGAP (Amélioration Génétique et Adaptation des Plantes Méditerranéennes et Tropicales), 34398 Montpellier, France;
- AGAP, University of Montpellier, CIRAD, INRAE (Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement), Institut Agro, 34398 Montpellier, France
| | - Simon George
- MGX-Montpellier GenomiX, University of Montpellier, CNRS (Centre National de la Recherche Scientifique), INSERM (Institut National de la Santé et de la Recherche Médicale), 34094 Montpellier, France;
| | - Roberto Poveda
- DANEC, Sangolqui/Rumiñahui, Sangolquí, Pichincha 171102, Ecuador;
| | | | - Timothy John Tranbarger
- DIADE (Diversité, Adaptation, Développement des Plantes), University of Montpellier, CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement), IRD (Institut de Recherche pour le Développement), 34393 Montpellier, France; (F.M.); (J.S.); (A.B.); (M.C.)
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KÜÇÜKER E, AĞLAR E. The Effect of Aminoethoxyvinylglycine (AVG) on Pre-harvest Fruit Drop and Fruit Quality in Red Chief and Braeburn Apple Cultivars. ULUSLARARASI TARIM VE YABAN HAYATI BILIMLERI DERGISI 2021. [DOI: 10.24180/ijaws.920613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Sriskantharajah K, El Kayal W, Torkamaneh D, Ayyanath MM, Saxena PK, Sullivan AJ, Paliyath G, Subramanian J. Transcriptomics of Improved Fruit Retention by Hexanal in 'Honeycrisp' Reveals Hormonal Crosstalk and Reduced Cell Wall Degradation in the Fruit Abscission Zone. Int J Mol Sci 2021; 22:ijms22168830. [PMID: 34445535 PMCID: PMC8396267 DOI: 10.3390/ijms22168830] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/09/2021] [Accepted: 08/13/2021] [Indexed: 12/13/2022] Open
Abstract
Apples (Malus domestica Borkh) are prone to preharvest fruit drop, which is more pronounced in 'Honeycrisp'. Hexanal is known to improve fruit retention in several economically important crops. The effects of hexanal on the fruit retention of 'Honeycrisp' apples were assessed using physiological, biochemical, and transcriptomic approaches. Fruit retention and fruit firmness were significantly improved by hexanal, while sugars and fresh weight did not show a significant change in response to hexanal treatment. At commercial maturity, abscisic acid and melatonin levels were significantly lower in the treated fruit abscission zone (FAZ) compared to control. At this stage, a total of 726 differentially expressed genes (DEGs) were identified between treated and control FAZ. Functional classification of the DEGs showed that hexanal downregulated ethylene biosynthesis genes, such as S-adenosylmethionine synthase (SAM2) and 1-aminocyclopropane-1-carboxylic acid oxidases (ACO3, ACO4, and ACO4-like), while it upregulated the receptor genes ETR2 and ERS1. Genes related to ABA biosynthesis (FDPS and CLE25) were also downregulated. On the contrary, key genes involved in gibberellic acid biosynthesis (GA20OX-like and KO) were upregulated. Further, hexanal downregulated the expression of genes related to cell wall degrading enzymes, such as polygalacturonase (PG1), glucanases (endo-β-1,4-glucanase), and expansins (EXPA1-like, EXPA6, EXPA8, EXPA10-like, EXPA16-like). Our findings reveal that hexanal reduced the sensitivity of FAZ cells to ethylene and ABA. Simultaneously, hexanal maintained the cell wall integrity of FAZ cells by regulating genes involved in cell wall modifications. Thus, delayed fruit abscission by hexanal is most likely achieved by minimizing ABA through an ethylene-dependent mechanism.
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Affiliation(s)
- Karthika Sriskantharajah
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
| | - Walid El Kayal
- Department of Plant Agriculture, University of Guelph-Vineland Station, 4890 Victoria Ave N, Vineland, ON L0R2E0, Canada;
- Faculty of Agricultural and Food Science, American University of Beirut, Riad El Solh, P.O. Box 11-0236, Beirut 1107 2020, Lebanon
| | - Davoud Torkamaneh
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
- Faculté des Sciences de l’Agriculture et de l’alimentation, Universite Laval, Pavillon Paul-Comtois, 2425, rue de l’Agriculture, Local 1122, Québec City, QC G1V 0A6, Canada
| | - Murali M. Ayyanath
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
| | - Praveen K. Saxena
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
| | - Alan J. Sullivan
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
| | - Gopinadhan Paliyath
- Department of Plant Agriculture, University of Guelph, 50 Stone Road E, Guelph, ON N1G2W1, Canada; (K.S.); (D.T.); (M.M.A.); (P.K.S.); (A.J.S.); (G.P.)
| | - Jayasankar Subramanian
- Department of Plant Agriculture, University of Guelph-Vineland Station, 4890 Victoria Ave N, Vineland, ON L0R2E0, Canada;
- Correspondence: ; Tel.: +1-905-562-4141 (ext. 134)
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Li R, Shi CL, Wang X, Meng Y, Cheng L, Jiang CZ, Qi M, Xu T, Li T. Inflorescence abscission protein SlIDL6 promotes low light intensity-induced tomato flower abscission. PLANT PHYSIOLOGY 2021; 186:1288-1301. [PMID: 33711162 PMCID: PMC8195514 DOI: 10.1093/plphys/kiab121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/26/2021] [Indexed: 05/05/2023]
Abstract
In many fruiting plant species, flower abscission is induced by low light stress. Here, we elucidated how signaling mediated by the peptide INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) controls low light-induced flower drop in tomato (Solanum lycopersicum). We analyzed the expression patterns of an IDA-Like gene (SlIDL6) during low light-induced flower abscission, and used tandem mass spectrometry to identify and characterize the mature SlIDL6 peptide. Tomato knockout lines were created to investigate the in vivo function of SlIDL6. In addition, yeast one-hybrid assays were used to investigate the binding of the SlWRKY17 transcription factor to the SlIDL6 promoter, and silencing of SlWRKY17 expression delayed low light-induced flower abscission. SlIDL6 was specifically expressed in the abscission zone and at high levels during low light-induced abscission and ethylene treatment. SlIDL6 knockout lines showed delayed low light-induced flower drop, and the application of SlIDL6 peptide accelerated abscission. Overexpression of SlIDL6 rescued the ida mutant phenotype in Arabidopsis (Arabidopsis thaliana), suggesting functional conservation between species. SlIDL6-mediated abscission was via an ethylene-independent pathway. We report a SlWRKY17-SlIDL6 regulatory module that functions in low light promoted abscission by increasing the expression of enzymes involved in cell wall remodeling and disassembly.
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Affiliation(s)
- Ruizhen Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
| | - Chun-Lin Shi
- Department of Biosciences, University of Oslo, Blindern, 0316 Oslo, Norway
| | - Xiaoyang Wang
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
| | - Yan Meng
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
| | - Lina Cheng
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
| | - Cai-Zhong Jiang
- Crops Pathology and Genetic Research Unit, United States Department of Agriculture Agricultural Research Service, California 95616, USA
- Department of Plant Sciences, University of California, California 95616, USA
| | - Mingfang Qi
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
| | - Tao Xu
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
- Author for communication:
| | - Tianlai Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning 110866, People’s Republic of China
- Key Laboratory of Protected Horticulture of Ministry of Education, Shenyang, Liaoning Province, China
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40
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Xu YY, Liu SR, Gan ZM, Zeng RF, Zhang JZ, Hu CG. High-Density Genetic Map Construction and Identification of QTLs Controlling Leaf Abscission Trait in Poncirus trifoliata. Int J Mol Sci 2021; 22:ijms22115723. [PMID: 34072027 PMCID: PMC8198561 DOI: 10.3390/ijms22115723] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/06/2021] [Accepted: 05/24/2021] [Indexed: 11/16/2022] Open
Abstract
A high-density genetic linkage map is essential for genetic and genomic studies including QTL mapping, genome assembly, and comparative genomic analysis. Here, we constructed a citrus high-density linkage map using SSR and SNP markers, which are evenly distributed across the citrus genome. The integrated linkage map contains 4163 markers with an average distance of 1.12 cM. The female and male linkage maps contain 1478 and 2976 markers with genetic lengths of 1093.90 cM and 1227.03 cM, respectively. Meanwhile, a genetic map comparison demonstrates that the linear order of common markers is highly conserved between the clementine mandarin and Poncirus trifoliata. Based on this high-density integrated citrus genetic map and two years of deciduous phenotypic data, two loci conferring leaf abscission phenotypic variation were detected on scaffold 1 (including 36 genes) and scaffold 8 (including 107 genes) using association analysis. Moreover, the expression patterns of 30 candidate genes were investigated under cold stress conditions because cold temperature is closely linked with the deciduous trait. The developed high-density genetic map will facilitate QTL mapping and genomic studies, and the localization of the leaf abscission deciduous trait will be valuable for understanding the mechanism of this deciduous trait and citrus breeding.
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Affiliation(s)
| | | | | | | | - Jin-Zhi Zhang
- Correspondence: (J.-Z.Z.); (C.-G.H.); Tel.: +86-27-8728-2010 (J.-Z.Z. & C.-G.H.)
| | - Chun-Gen Hu
- Correspondence: (J.-Z.Z.); (C.-G.H.); Tel.: +86-27-8728-2010 (J.-Z.Z. & C.-G.H.)
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Wang Y, Xu S, Zhang W, Li Y, Wang N, He X, Chen W. Responses of growth, photosynthesis and related physiological characteristics in leaves of Acer ginnala Maxim. to increasing air temperature and/or elevated O 3. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23 Suppl 1:221-231. [PMID: 33527649 DOI: 10.1111/plb.13240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/12/2021] [Accepted: 01/21/2021] [Indexed: 05/26/2023]
Abstract
Regional warming and atmospheric ozone (O3 ) pollution are two of the most important environmental issues, and commonly coexist in many areas. Both factors have an intense impact on plants. However, little information is available on the combined and interactive effects of air warming and elevated O3 concentrations on physiological characteristics of plants. To explore this issue, we studied variations in growth, photosynthesis and physiological characteristics of leaves of Acer ginnala seedlings exposed to control (ambient temperature and O3 ), increasing air temperature (ambient temperature + 2 °C), elevated O3 (ambient O3 concentration + 40 ppb) and a combination of the two abiotic factors at different phenological stages by using open-top chambers. The results showed that increasing air temperature had no significant effect on growth, but increased photosynthesis and antioxidant enzyme activity at the leaf unfolding and defoliation stages. In contrast, elevated O3 decreased growth and photosynthesis and caused oxidative stress injury in A. ginnala leaves at each phenological stage. The combination of increasing air temperature and elevated O3 improved growth and net photosynthetic rates of tested plants and alleviated the oxidative stress compared to O3 alone. Our findings demonstrated that moderate warming was beneficial to A. ginnala at leaf unfolding and defoliation stages, and alleviated the adverse effects of O3 stress on growth, photosynthesis and the antioxidant system. These results will provide a theoretical reference and scientific basis for the adaptation and response of A. ginnala under regional air warming and atmospheric O3 pollution.
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Affiliation(s)
- Y Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - S Xu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- Chinese Academy of Sciences Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, 110016, China
| | - W Zhang
- College of Environment, Shenyang University, 110044, China
| | - Y Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- Shenyang Arboretum, Chinese Academy of Sciences, Shenyang, 110016, China
| | - N Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - X He
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- Chinese Academy of Sciences Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, 110016, China
- Shenyang Arboretum, Chinese Academy of Sciences, Shenyang, 110016, China
| | - W Chen
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
- Chinese Academy of Sciences Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, 110016, China
- Shenyang Arboretum, Chinese Academy of Sciences, Shenyang, 110016, China
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Ma X, Yuan Y, Li C, Wu Q, He Z, Li J, Zhao M. Brassinosteroids suppress ethylene-induced fruitlet abscission through LcBZR1/2-mediated transcriptional repression of LcACS1/4 and LcACO2/3 in litchi. HORTICULTURE RESEARCH 2021; 8:105. [PMID: 33931615 PMCID: PMC8087802 DOI: 10.1038/s41438-021-00540-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 02/09/2021] [Accepted: 02/22/2021] [Indexed: 05/16/2023]
Abstract
Abscission in plants is tightly controlled by multiple phytohormones and the expression of various genes. However, whether the plant hormone brassinosteroids (BRs) are involved in this process is largely unknown. Here, we found that exogenous application of BRs reduced the ethylene-induced fruitlet abscission of litchi due to lower ethylene (ET) production and suppressed the expression of the ethylene biosynthetic genes LcACS1/4 and LcACO2/3 in the fruitlet abscission zone (FAZ). Two genes that encode the BR core signaling components brassinazole resistant (BZR) proteins, namely, LcBZR1 and LcBZR2, were characterized. LcBZR1/2 were localized to the nucleus and acted as transcription repressors. Interestingly, the LcBZR1/2 transcript levels were not changed during ET-induced fruitlet abscission, while their expression levels were significantly increased after BR application. Moreover, gel shift and transient expression assays indicated that LcBZR1/2 could suppress the transcription of LcACS1/4 and LcACO2/3 by specifically binding to their promoters. Importantly, ectopic expression of LcBZR1/2 in Arabidopsis significantly delayed floral organ abscission and suppressed ethylene biosynthesis. Collectively, our results suggest that BRs suppress ET-induced fruitlet abscission through LcBZR1/2-controlled expression of genes related to ethylene biosynthesis in litchi. In addition, similar results were observed in the Arabidopsis gain-of-function mutant bzr1-1D, which showed delayed floral organ abscission in parallel with lower expression of ACS/ACO genes and reduced ethylene production, suggesting that the mechanism of BZR-controlled organ abscission via regulation of ethylene biosynthesis might be conserved in Arabidopsis.
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Affiliation(s)
- Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China
| | - Ye Yuan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China
| | - Caiqin Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China
| | - Qian Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China
| | - Zidi He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China.
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China.
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, China Litchi Research Center, South China Agricultural University, 510642, Guangzhou, China.
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China.
- Ministry of Agriculture and Rural Affairs Key Laboratory of South China Horticultural Crop Biology and Germplasm Enhancement, College of Horticulture, South China Agricultural University, 510642, Guangzhou, China.
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Qiu Z, Wen Z, Hou Q, Qiao G, Yang K, Hong Y, Wen X. Cross-talk between transcriptome, phytohormone and HD-ZIP gene family analysis illuminates the molecular mechanism underlying fruitlet abscission in sweet cherry (Prunus avium L). BMC PLANT BIOLOGY 2021; 21:173. [PMID: 33838661 PMCID: PMC8035788 DOI: 10.1186/s12870-021-02940-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The shedding of premature sweet cherry (Prunus avium L) fruitlet has significantly impacted production, which in turn has a consequential effect on economic benefits. RESULT To better understand the molecular mechanism of sweet cherry fruitlet abscission, pollen viability and structure had been observed from the pollination trees. Subsequently, the morphological characters of the shedding fruitlet, the plant hormone titers of dropping carpopodium, the transcriptome of the abscising carpopodium, as well as the HD-ZIP gene family were investigated. These findings showed that the pollens giving rise to heavy fruitlet abscission were malformed in structure, and their viability was lower than the average level. The abscising fruitlet and carpopodium were characterized in red color, and embryos of abscising fruitlet were aborted, which was highly ascribed to the low pollen viability and malformation. Transcriptome analysis showed 6462 were significantly differentially expressed, of which 2456 genes were up-regulated and 4006 down-regulated in the abscising carpopodium. Among these genes, the auxin biosynthesis and signal transduction genes (α-Trp, AUX1), were down-regulated, while the 1-aminocyclopropane-1-carboxylate oxidase gene (ACO) affected in ethylene biosynthesis, was up-regulated in abscising carpopodium. About genes related to cell wall remodeling (CEL, PAL, PG EXP, XTH), were up-regulated in carpopodium abscission, which reflecting the key roles in regulating the abscission process. The results of transcriptome analysis considerably conformed with those of proteome analysis as documented previously. In comparison with those of the retention fruitlet, the auxin contents in abscising carpopodium were significantly low, which presumably increased the ethylene sensitivity of the abscission zone, conversely, the abscisic acid (ABA) accumulation was considerably higher in abscising carpopodium. Furthermore, the ratio of (TZ + IAA + GA3) / ABA also obviously lower in abscising carpopodium. Besides, the HD-ZIP gene family analysis showed that PavHB16 and PavHB18 were up-regulated in abscising organs. CONCLUSION Our findings combine morphology, cytology and transcriptional regulation to reveal the molecular mechanism of sweet cherry fruitlet abscission. It provides a new perspective for further study of plant organ shedding.
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Affiliation(s)
- Zhilang Qiu
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Zhuang Wen
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Qiandong Hou
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Guang Qiao
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Kun Yang
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Yi Hong
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China
| | - Xiaopeng Wen
- Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/ College of Life Sciences, Guizhou University, Guizhou Province, 550025, Guiyang, China.
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Lee Y, Do VG, Kim S, Kweon H, McGhie TK. Cold stress triggers premature fruit abscission through ABA-dependent signal transduction in early developing apple. PLoS One 2021; 16:e0249975. [PMID: 33836019 PMCID: PMC8034736 DOI: 10.1371/journal.pone.0249975] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 03/29/2021] [Indexed: 01/31/2023] Open
Abstract
Fruit abscission is a complex physiological process that is regulated by internal and environmental factors. During early development, apple fruit are exposed to extreme temperature fluctuations that are associated with premature fruit drop; however, their effect on fruit abscission is largely unknown. We hypothesized that fruit abscission is triggered by cold stress and investigated the molecular basis of premature fruit drop using RNA-Seq and metabolomics data from apple fruit undergoing abscission following cold stress in the field. Genes responsive to abscisic acid signaling and cell wall degradation were upregulated during abscission, consistent with the increased abscisic acid concentrations detected by liquid chromatography-mass spectrometry. We performed ex vivo cold shock experiments with excised tree subunits consisting of a branch, pedicel, and fruit. Abscission induction occurred in the cold-stressed subunits with concurrent upregulation of abscisic acid biosynthesis (MdNCED1) and metabolism (MdCYP707A) genes, and ethylene biosynthesis (MdACS1) and receptor (MdETR2) genes in the pedicel. Another key finding was the activation of cytoplasmic streaming in abscission-zone cells detected by electron microscopy. Our results provide a novel insight into the molecular basis of fruit abscission physiology in response to cold stress in apple.
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Affiliation(s)
- Youngsuk Lee
- Apple Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration, Gunwi, South Korea
- School of Biological Sciences, College of National Science, Seoul National University, Seoul, South Korea
- * E-mail:
| | - Van Giap Do
- Apple Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration, Gunwi, South Korea
| | - Seonae Kim
- Apple Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration, Gunwi, South Korea
| | - Hunjoong Kweon
- Apple Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration, Gunwi, South Korea
| | - Tony K. McGhie
- The New Zealand Institute for Plant and Food Research Limited, Palmerston North, New Zealand
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Yan F, Gong Z, Hu G, Ma X, Bai R, Yu R, Zhang Q, Deng W, Li Z, Wuriyanghan H. Tomato SlBL4 plays an important role in fruit pedicel organogenesis and abscission. HORTICULTURE RESEARCH 2021; 8:78. [PMID: 33790250 PMCID: PMC8012377 DOI: 10.1038/s41438-021-00515-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/08/2021] [Accepted: 02/06/2021] [Indexed: 05/21/2023]
Abstract
Abscission, a cell separation process, is an important trait that influences grain and fruit yield. We previously reported that BEL1-LIKE HOMEODOMAIN 4 (SlBL4) is involved in chloroplast development and cell wall metabolism in tomato fruit. In the present study, we showed that silencing SlBL4 resulted in the enlargement and pre-abscission of the tomato (Solanum lycopersicum cv. Micro-TOM) fruit pedicel. The anatomic analysis showed the presence of more epidermal cell layers and no obvious abscission zone (AZ) in the SlBL4 RNAi lines compared with the wild-type plants. RNA-seq analysis indicated that the regulation of abscission by SlBL4 was associated with the altered abundance of genes related to key meristems, auxin transporters, signaling components, and cell wall metabolism. Furthermore, SlBL4 positively affected the auxin concentration in the abscission zone. A dual-luciferase reporter assay revealed that SlBL4 activated the transcription of the JOINTLESS, OVATE, PIN1, and LAX3 genes. We reported a novel function of SlBL4, which plays key roles in fruit pedicel organogenesis and abscission in tomatoes.
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Affiliation(s)
- Fang Yan
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, School of Life Science, Inner Mongolia University, Hohhot, 010021, China
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China
| | - Zhehao Gong
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China
| | - Guojian Hu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China
| | - Xuesong Ma
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, School of Life Science, Inner Mongolia University, Hohhot, 010021, China
| | - Runyao Bai
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, School of Life Science, Inner Mongolia University, Hohhot, 010021, China
| | - Ruonan Yu
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, School of Life Science, Inner Mongolia University, Hohhot, 010021, China
| | - Qiang Zhang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
| | - Wei Deng
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China
| | - Zhengguo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, 401331, Chongqing, China.
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331, Chongqing, China.
| | - Hada Wuriyanghan
- Key Laboratory of Herbage & Endemic Crop Biotechnology, Ministry of Education, School of Life Science, Inner Mongolia University, Hohhot, 010021, China.
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Characterization of Two Ethephon-Induced IDA-Like Genes from Mango, and Elucidation of Their Involvement in Regulating Organ Abscission. Genes (Basel) 2021; 12:genes12030439. [PMID: 33808710 PMCID: PMC8003476 DOI: 10.3390/genes12030439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/17/2022] Open
Abstract
In mango (Mangifera indica L.), fruitlet abscission limits productivity. The INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) peptide acts as a key component controlling abscission events in Arabidopsis. IDA-like peptides may assume similar roles in fruit trees. In this study, we isolated two mango IDA-like encoding-genes, MiIDA1 and MiIDA2. We used mango fruitlet-bearing explants and fruitlet-bearing trees, in which fruitlets abscission was induced using ethephon. We monitored the expression profiles of the two MiIDA-like genes in control and treated fruitlet abscission zones (AZs). In both systems, qRT-PCR showed that, within 24 h, both MiIDA-like genes were induced by ethephon, and that changes in their expression profiles were associated with upregulation of different ethylene signaling-related and cell-wall modifying genes. Furthermore, ectopic expression of both genes in Arabidopsis promoted floral-organ abscission, and was accompanied by an early increase in the cytosolic pH of floral AZ cells-a phenomenon known to be linked with abscission, and by activation of cell separation in vestigial AZs. Finally, overexpression of both genes in an Atida mutant restored its abscission ability. Our results suggest roles for MiIDA1 and MiIDA2 in affecting mango fruitlet abscission. Based on our results, we propose new possible modes of action for IDA-like proteins in regulating organ abscission.
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Wilmowicz E, Kućko A, Pokora W, Kapusta M, Jasieniecka-Gazarkiewicz K, Tranbarger TJ, Wolska M, Panek K. EPIP-Evoked Modifications of Redox, Lipid, and Pectin Homeostasis in the Abscission Zone of Lupine Flowers. Int J Mol Sci 2021; 22:3001. [PMID: 33809409 PMCID: PMC7999084 DOI: 10.3390/ijms22063001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/08/2021] [Accepted: 03/12/2021] [Indexed: 11/16/2022] Open
Abstract
Yellow lupine is a great model for abscission-related research given that excessive flower abortion reduces its yield. It has been previously shown that the EPIP peptide, a fragment of LlIDL (INFLORESCENCE DEFICIENT IN ABSCISSION) amino-acid sequence, is a sufficient molecule to induce flower abortion, however, the question remains: What are the exact changes evoked by this peptide locally in abscission zone (AZ) cells? Therefore, we used EPIP peptide to monitor specific modifications accompanied by early steps of flower abscission directly in the AZ. EPIP stimulates the downstream elements of the pathway-HAESA and MITOGEN-ACTIVATED PROTEIN KINASE6 and induces cellular symptoms indicating AZ activation. The EPIP treatment disrupts redox homeostasis, involving the accumulation of H2O2 and upregulation of the enzymatic antioxidant system including superoxide dismutase, catalase, and ascorbate peroxidase. A weakening of the cell wall structure in response to EPIP is reflected by pectin demethylation, while a changing pattern of fatty acids and acyl lipids composition suggests a modification of lipid metabolism. Notably, the formation of a signaling molecule-phosphatidic acid is induced locally in EPIP-treated AZ. Collectively, all these changes indicate the switching of several metabolic and signaling pathways directly in the AZ in response to EPIP, which inevitably leads to flower abscission.
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Affiliation(s)
- Emilia Wilmowicz
- Department of Plant Physiology and Biotechnology, Nicolaus Copernicus University, 1 Lwowska Street, 87-100 Toruń, Poland; (M.W.); (K.P.)
| | - Agata Kućko
- Department of Plant Physiology, Institute of Biology, Warsaw University of Life Sciences-SGGW (WULS-SGGW), Nowoursynowska 159 Street, 02-776 Warsaw, Poland;
| | - Wojciech Pokora
- Department of Plant Physiology and Biotechnology, University of Gdańsk, 59 Wita Stwosza, 80-308 Gdańsk, Poland;
| | - Małgorzata Kapusta
- Department of Plant Cytology and Embryology, University of Gdańsk, 59 Wita Stwosza, 80-308 Gdańsk, Poland;
| | | | - Timothy John Tranbarger
- UMR DIADE, IRD Centre de Montpellier, Institut de Recherche pour le Développement, Université de Montpellier, 911 Avenue Agropolis BP 64501, 34394 CEDEX 5 Montpellier, France;
| | - Magdalena Wolska
- Department of Plant Physiology and Biotechnology, Nicolaus Copernicus University, 1 Lwowska Street, 87-100 Toruń, Poland; (M.W.); (K.P.)
| | - Katarzyna Panek
- Department of Plant Physiology and Biotechnology, Nicolaus Copernicus University, 1 Lwowska Street, 87-100 Toruń, Poland; (M.W.); (K.P.)
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Fooyontphanich K, Morcillo F, Joët T, Dussert S, Serret J, Collin M, Amblard P, Tangphatsornruang S, Roongsattham P, Jantasuriyarat C, Verdeil JL, Tranbarger TJ. Multi-scale comparative transcriptome analysis reveals key genes and metabolic reprogramming processes associated with oil palm fruit abscission. BMC PLANT BIOLOGY 2021; 21:92. [PMID: 33573592 PMCID: PMC7879690 DOI: 10.1186/s12870-021-02874-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Fruit abscission depends on cell separation that occurs within specialized cell layers that constitute an abscission zone (AZ). To determine the mechanisms of fleshy fruit abscission of the monocot oil palm (Elaeis guineensis Jacq.) compared with other abscission systems, we performed multi-scale comparative transcriptome analyses on fruit targeting the developing primary AZ and adjacent tissues. RESULTS Combining between-tissue developmental comparisons with exogenous ethylene treatments, and naturally occurring abscission in the field, RNAseq analysis revealed a robust core set of 168 genes with differentially regulated expression, spatially associated with the ripe fruit AZ, and temporally restricted to the abscission timing. The expression of a set of candidate genes was validated by qRT-PCR in the fruit AZ of a natural oil palm variant with blocked fruit abscission, which provides evidence for their functions during abscission. Our results substantiate the conservation of gene function between dicot dry fruit dehiscence and monocot fleshy fruit abscission. The study also revealed major metabolic transitions occur in the AZ during abscission, including key senescence marker genes and transcriptional regulators, in addition to genes involved in nutrient recycling and reallocation, alternative routes for energy supply and adaptation to oxidative stress. CONCLUSIONS The study provides the first reference transcriptome of a monocot fleshy fruit abscission zone and provides insight into the mechanisms underlying abscission by identifying key genes with functional roles and processes, including metabolic transitions, cell wall modifications, signalling, stress adaptations and transcriptional regulation, that occur during ripe fruit abscission of the monocot oil palm. The transcriptome data comprises an original reference and resource useful towards understanding the evolutionary basis of this fundamental plant process.
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Affiliation(s)
- Kim Fooyontphanich
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- Grow A Green Co, Ltd. 556 Maha Chakraphat Rd. Namaung, Chachoengsao, Chachoengsao Province, 24000, Thailand
| | - Fabienne Morcillo
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- CIRAD, DIADE, F-34398, Montpellier, France
| | - Thierry Joët
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Stéphane Dussert
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Julien Serret
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | - Myriam Collin
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
| | | | - Sithichoke Tangphatsornruang
- National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Pathum Thani, Thailand
| | - Peerapat Roongsattham
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France
- Department of Genetics, Faculty of Science, Kasetsart University Bangkhen Campus, 50 Phahonyothin Road Jatujak, Bangkok, Thailand
| | - Chatchawan Jantasuriyarat
- Department of Genetics, Faculty of Science, Kasetsart University Bangkhen Campus, 50 Phahonyothin Road Jatujak, Bangkok, Thailand
| | - Jean-Luc Verdeil
- CIRAD, UMR AGAP, F-34398, Montpellier, France
- AGAP, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France
| | - Timothy J Tranbarger
- UMR DIADE, Institut de Recherche Pour le Développement, Université de Montpellier, IRD Centre de Montpellier, 911 Avenue Agropolis BP 64501, 34394 Cedex 5, Montpellier, France.
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Developmental transcriptome profiling uncovered carbon signaling genes associated with almond fruit drop. Sci Rep 2021; 11:3401. [PMID: 33564060 PMCID: PMC7873282 DOI: 10.1038/s41598-020-69395-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 04/29/2020] [Indexed: 01/30/2023] Open
Abstract
Almond is one of the most featured nut crops owing to its high nutritional value. However, due to three different waves of flower and fruitlet drop, fruit drop is a major concern for growers. In this study, we carried out a time-course transcriptome analysis to investigate gene expression differences between normal and abnormal fruitlet development. By de novo assembly analysis, we identified 33,577 unigenes and provided their functional annotations. In total, we identified 7,469 differentially expressed genes and observed the most apparent difference between normal and abnormal fruits at 12 and 17 days after flowering. Their biological functions were enriched in carbon metabolism, carbon fixation in photosynthetic organisms and plant hormone signal transduction. RT-qPCR validated the expression pattern of 14 representative genes, including glycosyltransferase like family 2, MYB39, IAA13, gibberellin-regulated protein 11-like and POD44, which confirmed the reliability of our transcriptome data. This study provides an insight into the association between abnormal fruit development and carbohydrate signaling from the early developmental stages and could be served as useful information for understanding the regulatory mechanisms related to almond fruit drop.
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50
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Du J, Lu S, Chai M, Zhou C, Sun L, Tang Y, Nakashima J, Kolape J, Wen Z, Behzadirad M, Zhong T, Sun J, Zhang Y, Wang Z. Functional characterization of PETIOLULE-LIKE PULVINUS (PLP) gene in abscission zone development in Medicago truncatula and its application to genetic improvement of alfalfa. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:351-364. [PMID: 32816361 PMCID: PMC7868985 DOI: 10.1111/pbi.13469] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/29/2020] [Accepted: 08/07/2020] [Indexed: 05/05/2023]
Abstract
Alfalfa (Medicago sativa L.) is one of the most important forage crops throughout the world. Maximizing leaf retention during the haymaking process is critical for achieving superior hay quality and maintaining biomass yield. Leaf abscission process affects leaf retention. Previous studies have largely focused on the molecular mechanisms of floral organ, pedicel and seed abscission but scarcely touched on leaf and petiole abscission. This study focuses on leaf and petiole abscission in the model legume Medicago truncatula and its closely related commercial species alfalfa. By analysing the petiolule-like pulvinus (plp) mutant in M. truncatula at phenotypic level (breakstrength and shaking assays), microscopic level (scanning electron microscopy and cross-sectional analyses) and molecular level (expression level and expression pattern analyses), we discovered that the loss of function of PLP leads to an absence of abscission zone (AZ) formation and PLP plays an important role in leaflet and petiole AZ differentiation. Microarray analysis indicated that PLP affects abscission process through modulating genes involved in hormonal homeostasis, cell wall remodelling and degradation. Detailed analyses led us to propose a functional model of PLP in regulating leaflet and petiole abscission. Furthermore, we cloned the PLP gene (MsPLP) from alfalfa and produced RNAi transgenic alfalfa plants to down-regulate the endogenous MsPLP. Down-regulation of MsPLP results in altered pulvinus structure with increased leaflet breakstrength, thus offering a new approach to decrease leaf loss during alfalfa haymaking process.
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Affiliation(s)
- Juan Du
- Noble Research InstituteArdmoreOKUSA
- Institute for Agricultural BiosciencesOklahoma State UniversityArdmoreOKUSA
- College of Grassland Science and TechnologyChina Agricultural UniversityBeijingChina
| | - Shaoyun Lu
- College of Life SciencesSouth China Agricultural UniversityGuangzhouChina
| | - Maofeng Chai
- Noble Research InstituteArdmoreOKUSA
- Grassland Agri‐Husbandry Research CenterCollege of Grassland ScienceQingdao Agricultural UniversityQingdaoChina
| | - Chuanen Zhou
- School of Life ScienceShandong UniversityQingdaoChina
| | - Liang Sun
- Noble Research InstituteArdmoreOKUSA
| | | | | | - Jaydeep Kolape
- Noble Research InstituteArdmoreOKUSA
- Morrison Microscopy Core Research FacilityCenter for BiotechnologyUniversity of Nebraska‐LincolnNEUSA
| | - Zhaozhu Wen
- Noble Research InstituteArdmoreOKUSA
- College of AgricultureHunan Agricultural UniversityHunanChina
| | - Marjan Behzadirad
- Institute for Agricultural BiosciencesOklahoma State UniversityArdmoreOKUSA
| | - Tianxiu Zhong
- College of Forestry and Landscape ArchitectureSouth China Agricultural UniversityGuangzhouChina
| | - Juan Sun
- Grassland Agri‐Husbandry Research CenterCollege of Grassland ScienceQingdao Agricultural UniversityQingdaoChina
| | - Yunwei Zhang
- College of Grassland Science and TechnologyChina Agricultural UniversityBeijingChina
| | - Zeng‐Yu Wang
- Noble Research InstituteArdmoreOKUSA
- Grassland Agri‐Husbandry Research CenterCollege of Grassland ScienceQingdao Agricultural UniversityQingdaoChina
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