1
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Luo L, Zheng Y, Li X, Chen Q, Yang D, Gu Z, Yang Y, Yang Y, Kong X, Yang Y. ICE1 interacts with IDD14 to transcriptionally activate QQS to increase pollen germination and viability. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024. [PMID: 38940322 DOI: 10.1111/jipb.13725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 05/23/2024] [Indexed: 06/29/2024]
Abstract
In flowering plants, sexual reproductive success depends on the production of viable pollen grains. However, the mechanisms by which QUA QUINE STARCH (QQS) regulates pollen development and how transcriptional activators facilitate the transcription of QQS in this process remain poorly understood. Here, we demonstrate that INDUCER OF CBF EXPRESSION 1 (ICE1), a basic helix-loop-helix (bHLH) transcription factor, acts as a key transcriptional activator and positively regulates QQS expression to increase pollen germination and viability in Arabidopsis thaliana by interacting with INDETERMINATE DOMAIN14 (IDD14). In our genetic and biochemical experiments, overexpression of ICE1 greatly promoted both the activation of QQS and high pollen viability mediated by QQS. IDD14 additively enhanced ICE1 function by promoting the binding of ICE1 to the QQS promoter. In addition, mutation of ICE1 significantly repressed QQS expression; the impaired function of QQS and the abnormal anther dehiscence jointly affected pollen development of the ice1-2 mutant. Our results also showed that the enhancement of pollen activity by ICE1 depends on QQS. Furthermore, QQS interacted with CUT1, the key enzyme for long-chain lipid biosynthesis. This interaction both promoted CUT1 activity and regulated pollen lipid metabolism, ultimately determining pollen hydration and fertility. Our results not only provide new insights into the key function of QQS in promoting pollen development by regulating pollen lipid metabolism, but also elucidate the mechanism that facilitates the transcription of QQS in this vital developmental process.
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Affiliation(s)
- Landi Luo
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yan Zheng
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Xieshengyang Li
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
- School of Agriculture, Yunnan University, Kunming, 650091, China
| | - Qian Chen
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Danni Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Zhijia Gu
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Ya Yang
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yunqiang Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Xiangxiang Kong
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yongping Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
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2
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Sze H, Klodová B, Ward JM, Harper JF, Palanivelu R, Johnson MA, Honys D. A wave of specific transcript and protein accumulation accompanies pollen dehydration. PLANT PHYSIOLOGY 2024; 195:1775-1795. [PMID: 38530638 DOI: 10.1093/plphys/kiae177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/13/2023] [Accepted: 01/08/2024] [Indexed: 03/28/2024]
Abstract
In flowering plants, male gametes are immotile and carried by dry pollen grains to the female organ. Dehydrated pollen is thought to withstand abiotic stress when grains are dispersed from the anther to the pistil, after which sperm cells are delivered via pollen tube growth for fertilization and seed set. Yet, the underlying molecular changes accompanying dehydration and the impact on pollen development are poorly understood. To gain a systems perspective, we analyzed published transcriptomes and proteomes of developing Arabidopsis thaliana pollen. Waves of transcripts are evident as microspores develop to bicellular, tricellular, and mature pollen. Between the "early"- and "late"-pollen-expressed genes, an unrecognized cluster of transcripts accumulated, including those encoding late-embryogenesis abundant (LEA), desiccation-related protein, transporters, lipid-droplet associated proteins, pectin modifiers, cysteine-rich proteins, and mRNA-binding proteins. Results suggest dehydration onset initiates after bicellular pollen is formed. Proteins accumulating in mature pollen like ribosomal proteins, initiation factors, and chaperones are likely components of mRNA-protein condensates resembling "stress" granules. Our analysis has revealed many new transcripts and proteins that accompany dehydration in developing pollen. Together with published functional studies, our results point to multiple processes, including (1) protect developing pollen from hyperosmotic stress, (2) remodel the endomembrane system and walls, (3) maintain energy metabolism, (4) stabilize presynthesized mRNA and proteins in condensates of dry pollen, and (5) equip pollen for compatibility determination at the stigma and for recovery at rehydration. These findings offer novel models and molecular candidates to further determine the mechanistic basis of dehydration and desiccation tolerance in plants.
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Affiliation(s)
- Heven Sze
- Department Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
| | - Božena Klodová
- Institute of Experimental Botany of the Czech Academy of Sciences, 165 02 Prague 6, Czech Republic
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Praha 2, 128 00, Czech Republic
| | - John M Ward
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, USA
| | - Jeffrey F Harper
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 89557, USA
| | | | - Mark A Johnson
- Department of Molecular, Cellular Biology, and Biochemistry, Brown University, Providence, RI 02912, USA
| | - David Honys
- Institute of Experimental Botany of the Czech Academy of Sciences, 165 02 Prague 6, Czech Republic
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3
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Li Z, Lu S, Yi S, Mo S, Yu X, Yin J, Zhang C. Physiological and transcriptomic comparisons shed light on the cold stress response mechanisms of Dendrobium spp. BMC PLANT BIOLOGY 2024; 24:230. [PMID: 38561687 PMCID: PMC10985946 DOI: 10.1186/s12870-024-04903-1] [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: 11/13/2023] [Accepted: 03/13/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Dendrobium spp. comprise a group of tropical orchids with ornamental and medicinal value. Dendrobium spp. are sensitive to low temperature, and the underlying cold response regulatory mechanisms in this group are unclear. To understand how these plants respond to cold stress, we compared the transcriptomic responses of the cold-tolerant cultivar 'Hongxing' (HX) and the cold-sensitive cultivar 'Sonia Hiasakul' (SH) to cold stress. RESULTS Chemometric results showed that the physiological response of SH in the later stages of cold stress is similar to that of HX throughout the cold treatment. Orthogonal partial least squares discriminant analysis (OPLS-DA) revealed that soluble protein content and peroxidase activity are key physiological parameters for assessing the cold tolerance of these two Dendrobium spp. cultivars. Additionally, weighted gene co-expression network analysis (WGCNA) results showed that many cold response genes and metabolic pathways significantly associated with the physiological indices were enriched in the 12 detected modules. The Kyoto Encyclopedia of Genes and Genomes (KEGG) and gene ontology (GO) enrichment analyses of the 105 hub genes showed that Dendrobium spp. adapt to cold stress by regulating signal transduction, phytohormones, transcription factors, protein translation and modification, functional proteins, biosynthesis and metabolism, cell structure, light, and the circadian clock. Hub genes of the cold stress response network included the remorin gene pp34, the abscisic acid signaling pathway-related genes PROTEIN PHOSPATASE 2 C (PP2C), SNF1-RELATED PROTEIN KINASE 2 (SnRK2), ABRE-BINDING FACTOR 1 (ABF1) and SKI-INTERACTING PROTEIN 17 (SKIP17), the Ca2+ signaling-related GTP diphosphokinase gene CRSH1, the carbohydrate-related gene STARCH SYNTHASE 2 (SS2), the cell wall biosynthesis gene CINNAMYL ALCOHOL DEHYDROGENASE (CAD7), and the endocytosis-related gene VACUOLAR PROTEIN SORTING-ASSOCIATED PROTEIN 52 A (VPS52A). CONCLUSIONS The cold-responsive genes and metabolic pathways of Dendrobium spp. revealed in this study provide important insight to enable the genetic enhancement of cold tolerance in Dendrobium spp., and to facilitate cold tolerance breeding in related plants.
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Affiliation(s)
- Zhiyuan Li
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, 100193, Beijing, China
| | - Shunjiao Lu
- Tropical Crops Genetic Resources Institute, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Chines Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, China
- Hainan Engineering Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, 571737, Danzhou, Hainan, China
| | - Shuangshuang Yi
- Tropical Crops Genetic Resources Institute, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Chines Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, China
- Hainan Engineering Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, 571737, Danzhou, Hainan, China
| | - Shunjin Mo
- Tropical Crops Genetic Resources Institute, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Chines Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, China
- Hainan Engineering Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, 571737, Danzhou, Hainan, China
| | - Xiaoyun Yu
- Tropical Crops Genetic Resources Institute, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Chines Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, China
- Hainan Engineering Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, 571737, Danzhou, Hainan, China
| | - Junmei Yin
- Tropical Crops Genetic Resources Institute, Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Chines Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, China.
- Hainan Engineering Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, 571737, Danzhou, Hainan, China.
- Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, 571101, Sanya, China.
| | - Changqing Zhang
- Sanya Institute of China Agricultural University, Sanya, Hainan, 572025, China.
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, 100193, Beijing, China.
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4
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Zhang J, Shi J, Zeng K, Cai M, Lan X. Transcriptomic landscape of staminate catkins development during overwintering process in Betula platyphylla. FRONTIERS IN PLANT SCIENCE 2024; 14:1249122. [PMID: 38259941 PMCID: PMC10801112 DOI: 10.3389/fpls.2023.1249122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/06/2023] [Indexed: 01/24/2024]
Abstract
Betula platyphylla, belonging to the cold-specialized lineage Betulaceae, exhibits a unique reproductive strategy where staminate catkins emerge in the first summer and undergo an overwintering process, culminating in flowering in the following year. However, the underlying regulatory mechanism remains unclear. In this study, we investigated the male germline development of B. platyphylla in four distinct stages: microsporocytes in Oct. (S1), uninuclear microspores from Dec. (S2) to Mar. of the following year (S3), and bicellular microspores in Apr. (S4). We performed RNA sequencing on mature pollen and the four stages of staminate catkins. Using weighted gene co-expression network analysis (WGCNA), we identified five highly correlated gene modules with distinct expression profiles. These modules exhibited strong correlations with sugar metabolism, cell cycle, flowering, and cell wall dynamics, highlighting their dynamic roles during male germline developmental stages. During the overwintering process, we observed that the expression of transcription factors such as BpDUO1 and BpAMS at the appropriate developmental stages, suggests their significant roles in male germline development. The expression patterns of BpFLC and BpFT suggest their potential involvement in temperature perception during male reproductive development. These findings offer valuable insights into the reproductive success of plants adapting to cold environments.
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Affiliation(s)
| | | | | | | | - Xingguo Lan
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, China
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5
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Chen Y, Qi H, Yang L, Xu L, Wang J, Guo J, Zhang L, Tan Y, Pan R, Shu Q, Qian Q, Song S. The OsbHLH002/OsICE1-OSH1 module orchestrates secondary cell wall formation in rice. Cell Rep 2023; 42:112702. [PMID: 37384532 DOI: 10.1016/j.celrep.2023.112702] [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: 03/17/2023] [Revised: 04/26/2023] [Accepted: 06/09/2023] [Indexed: 07/01/2023] Open
Abstract
Transcriptional regulation of secondary cell wall (SCW) formation is strictly controlled by a complex network of transcription factors in vascular plants and has been shown to be mediated by a group of NAC master switches. In this study, we show that in a bHLH transcription factor, OsbHLH002/OsICE1, its loss-of-function mutant displays a lodging phenotype. Further results show that OsbHLH002 and Oryza sativa homeobox1 (OSH1) interact and share a set of common targets. In addition, the DELLA protein SLENDER RICE1, rice ortholog of KNOTTED ARABIDOPSIS THALIANA7, and OsNAC31 interact with OsbHLH002 and OSH1 and regulate their binding capacity on OsMYB61, a key regulatory factor in SCW development. Collectively, our results indicate OsbHLH002 and OSH1 as key regulators in SCW formation and shed light on molecular mechanisms of how active and repressive factors precisely orchestrate SCW synthesis in rice, which may provide a strategy for manipulating plant biomass production.
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Affiliation(s)
- Ying Chen
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China; State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China
| | - Haoyue Qi
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Lijia Yang
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Liang Xu
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Jiaxuan Wang
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Jiazhuo Guo
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Liang Zhang
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Yuanyuan Tan
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Ronghui Pan
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
| | - Qingyao Shu
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Qian Qian
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China
| | - Shiyong Song
- State Key Laboratory of Rice Biology and Breeding, Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
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6
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Li S, Hu Y, Yang H, Tian S, Wei D, Tang Q, Yang Y, Wang Z. The Regulatory Roles of MYC TFs in Plant Stamen Development. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 333:111734. [PMID: 37207819 DOI: 10.1016/j.plantsci.2023.111734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 05/21/2023]
Abstract
The stamen, as the male reproductive organ of flowering plants, plays a critical role in completing the life cycle of plants. MYC transcription factors are members of the bHLH IIIE subgroup and participate in a number of plant biological processes. In recent decades, a number of studies have confirmed that MYC transcription factors actively participate in the regulation of stamen development and have a critical impact on plant fertility. In this review, we summarized how MYC transcription factors play a role in regulating secondary thickening of the anther endothecium, the development and degradation of the tapetum, stomatal differentiation, and the dehydration of the anther epidermis. With regard to anther physiological metabolism, MYC transcription factors control dehydrin synthesis, ion and water transport, and carbohydrate metabolism to influence pollen viability. Additionally, MYCs participate in the JA signal transduction pathway, where they directly or indirectly control the development of stamens through the ET-JA, GA-JA, and ABA-JA pathways. By identifying the functions of MYCs during plant stamen development, it will help us to obtain a more comprehensive understanding not only on the molecular functions of this TF family but also the mechanisms underlying stamen development.
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Affiliation(s)
- Sirui Li
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
| | - Yao Hu
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
| | - Huiqing Yang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
| | - Shibing Tian
- The Institute of Vegetables and Flowers, Chongqing Academy of Agricultural Sciences, Chongqing 400055, China.
| | - Dayong Wei
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
| | - Qinglin Tang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
| | - Yang Yang
- The Institute of Vegetables and Flowers, Chongqing Academy of Agricultural Sciences, Chongqing 400055, China.
| | - Zhimin Wang
- College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Olericulture, Chongqing, 400715, China.
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7
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Peng G, Liu Z, Zhuang C, Zhou H. Environment-sensitive genic male sterility in rice and other plants. PLANT, CELL & ENVIRONMENT 2023; 46:1120-1142. [PMID: 36458343 DOI: 10.1111/pce.14503] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/20/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Environment-sensitive genic male sterility is a type of male sterility that is affected by both genetic and environmental factors. Environment-sensitive genic male sterile lines are not only used in two-line hybrid breeding but are also good materials for studying plant-environment interactions. In this study we review the research progress on environment-sensitive genic male sterility in rice from the perspectives of epigenetic, transcriptional, posttranscriptional, posttranslational and metabolic mechanisms as well as signal transduction processes. While significant progress has been made in the genetics, gene cloning and understanding of the molecular mechanisms of environment-sensitive genic male sterility in recent years, the relevant regulatory network is still poorly understood in rice. We therefore also review studies of environment-sensitive genic male sterility in Arabidopsis and other crops, hoping to promote research in this field in rice. Finally, we analyse the challenges posed by environment-sensitive genic male sterility and provide corresponding suggestions. This review will contribute towards an understanding the molecular genetics of environment-sensitive genic male sterility and its application in two-line hybrid breeding in rice and other species.
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Affiliation(s)
- Guoqing Peng
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Zhenlan Liu
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Chuxiong Zhuang
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Hai Zhou
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou, China
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8
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Moriya KC, Shirakawa M, Loue-Manifel J, Matsuda Y, Lu YT, Tamura K, Oka Y, Matsushita T, Hara-Nishimura I, Ingram G, Nishihama R, Goodrich J, Kohchi T, Shimada T. Stomatal regulators are co-opted for seta development in the astomatous liverwort Marchantia polymorpha. NATURE PLANTS 2023; 9:302-314. [PMID: 36658391 DOI: 10.1038/s41477-022-01325-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
The evolution of special types of cells requires the acquisition of new gene regulatory networks controlled by transcription factors (TFs). In stomatous plants, a TF module formed by subfamilies Ia and IIIb basic helix-loop-helix TFs (Ia-IIIb bHLH) regulates stomatal formation; however, how this module evolved during land plant diversification remains unclear. Here we show that, in the astomatous liverwort Marchantia polymorpha, a Ia-IIIb bHLH module regulates the development of a unique sporophyte tissue, the seta, which is found in mosses and liverworts. The sole Ia bHLH gene, MpSETA, and a IIIb bHLH gene, MpICE2, regulate the cell division and/or differentiation of seta lineage cells. MpSETA can partially replace the stomatal function of Ia bHLH TFs in Arabidopsis thaliana, suggesting that a common regulatory mechanism underlies setal and stomatal formation. Our findings reveal the co-option of a Ia-IIIb bHLH TF module for regulating cell fate determination and/or cell division of distinct types of cells during land plant evolution.
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Affiliation(s)
- Kenta C Moriya
- Graduate School of Science, Kyoto University, Kyoto, Japan
| | - Makoto Shirakawa
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST), Ikoma, Japan
| | - Jeanne Loue-Manifel
- Laboratoire Reproduction et Développement des Plantes, ENS de Lyon, CNRS, INRAE, UCB Lyon 1, Lyon, France
- Institute of Molecular Plant Sciences, University of Edinburgh, Daniel Rutherford Building, Max Born Crescent, Edinburgh, UK
| | - Yoriko Matsuda
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Yen-Ting Lu
- Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST), Ikoma, Japan
- Institute of Molecular Plant Sciences, University of Edinburgh, Daniel Rutherford Building, Max Born Crescent, Edinburgh, UK
| | - Kentaro Tamura
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yoshito Oka
- Graduate School of Science, Kyoto University, Kyoto, Japan
| | | | | | - Gwyneth Ingram
- Laboratoire Reproduction et Développement des Plantes, ENS de Lyon, CNRS, INRAE, UCB Lyon 1, Lyon, France
| | - Ryuichi Nishihama
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
| | - Justin Goodrich
- Institute of Molecular Plant Sciences, University of Edinburgh, Daniel Rutherford Building, Max Born Crescent, Edinburgh, UK
| | - Takayuki Kohchi
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Tomoo Shimada
- Graduate School of Science, Kyoto University, Kyoto, Japan.
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9
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Zhu L, Yang J, Zhang Y, Hu H, Cui J, Xue J, Xu J. Overexpression of CfICE1 from Cryptomeria fortunei Enhances Cold, Drought and Salt Stress in Poplar. Int J Mol Sci 2022; 23:ijms232315214. [PMID: 36499538 PMCID: PMC9736380 DOI: 10.3390/ijms232315214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/21/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
ICE1, a regulator of the cold-inducible transcriptome and freezing tolerance, is currently widely believed to be involved in plant resistance to cold stress. In this study, CfICE1 from Cryptomeria fortunei was transformed into poplar. Physiological indicators of transgenic, empty vector and wild-type poplar after abiotic stress (cold, drought and salt) were determined. Transgenic lines had a higher chlorophyll content, antioxidant enzyme activity and soluble protein content, as well as a lower malondialdehyde and hydrogen peroxide content. The ultrastructure of the plant was observed by transmission electron microscopy, and after stress, the cell structure of the transgenic line was more complete than that of the wild type. CfICE1 was upregulated in transgenic poplar trees after abiotic stress (cold, drought and salt). The CfICE1 transgenic plants improved plant resistance by regulating the CBF gene of poplar under cold and salt stress. In terms of plant responses to abiotic stress, this study showed that overexpression of CfICE1 improved the cold, drought and salt tolerance of poplars.
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Affiliation(s)
| | | | | | | | | | | | - Jin Xu
- Correspondence: ; Tel.: +86-138-1383-1609
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10
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Bertolino LT, Caine RS, Zoulias N, Yin X, Chater CCC, Biswal A, Quick WP, Gray JE. Stomatal Development and Gene Expression in Rice Florets. PLANT & CELL PHYSIOLOGY 2022; 63:1679-1694. [PMID: 35993973 DOI: 10.1093/pcp/pcac120] [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: 02/03/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Stomata play a fundamental role in modulating the exchange of gases between plants and the atmosphere. These microscopic structures form in high numbers on the leaf epidermis and are also present on flowers. Although leaf stomata are well studied, little attention has been paid to the development or function of floral stomata. Here, we characterize in detail the spatial distribution and development of the floral stomata of the indica rice variety IR64. We show that stomatal complexes are present at low density on specific areas of the lemma, palea and anthers and are morphologically different compared to stomata found on leaves. We reveal that in the bract-like organs, stomatal development follows the same cell lineage transitions as in rice leaves and demonstrate that the overexpression of the stomatal development regulators OsEPFL9-1 and OsEPF1 leads to dramatic changes in stomatal density in rice floral organs, producing lemma with approximately twice as many stomata (OsEPFL9-1_oe) or lemma where stomata are practically absent (OsEPF1_oe). Transcriptomic analysis of developing florets also indicates that the cellular transitions during the development of floral stomata are regulated by the same genetic network used in rice leaves. Finally, although we were unable to detect an impact on plant reproduction linked to changes in the density of floral stomata, we report alterations in global gene expression in lines overexpressing OsEPF1 and discuss how our results reflect on the possible role(s) of floral stomata.
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Affiliation(s)
- Lígia T Bertolino
- Grantham Centre for Sustainable Futures, University of Sheffield, Sheffield S10 2TN, UK
- School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
| | - Robert S Caine
- School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
| | - Nicholas Zoulias
- School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
| | - Xiaojia Yin
- International Rice Research Institute, DAPO 7777, Metro Manila, Philippines
| | - Caspar C C Chater
- Trait Diversity and Function, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AE, UK
| | - Akshaya Biswal
- Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Mexico City 06600, Mexico
| | - William P Quick
- School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
- International Rice Research Institute, DAPO 7777, Metro Manila, Philippines
| | - Julie E Gray
- School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
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11
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Liu J, Ghelli R, Cardarelli M, Geisler M. Arabidopsis TWISTED DWARF1 regulates stamen elongation by differential activation of ABCB1,19-mediated auxin transport. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:4818-4831. [PMID: 35512423 DOI: 10.1093/jxb/erac185] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 05/04/2022] [Indexed: 06/14/2023]
Abstract
Despite clear evidence that a local accumulation of auxin is likewise critical for male fertility, much less is known about the components that regulate auxin-controlled stamen development. In this study, we analyzed physiological and morphological parameters in mutants of key players of ABCB-mediated auxin transport, and spatially and temporally dissected their expression on the protein level as well as auxin fluxes in the Arabidopsis stamens. Our analyses revealed that the FKBP42, TWISTED DWARF1 (TWD1), promotes stamen elongation and, to a lesser extent, anther dehiscence, as well as pollen maturation, and thus is required for seed development. Most of the described developmental defects in twd1 are shared with the abcb1 abcb19 mutant, which can be attributed to the fact that TWD1-as a described ABCB chaperone-is a positive regulator of ABCB1- and ABCB19-mediated auxin transport. However, reduced stamen number was dependent on TWD1 but not on investigated ABCBs, suggesting additional players downstream of TWD1. We predict an overall housekeeping function for ABCB1 during earlier stages, while ABCB19 seems to be responsible for the key event of rapid elongation at later stages of stamen development. Our data indicate that TWD1 controls stamen development by differential activation of ABCB1,19-mediated auxin transport in the stamen.
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Affiliation(s)
- Jie Liu
- University of Fribourg, Department of Biology, CH-1700 Fribourg, Switzerland
| | - Roberta Ghelli
- IBPM-CNR, Dipartimento di Biologia e Biotecnologie, Sapienza Università di Roma, P. le A. Moro 5, 00185 Roma, Italy
| | - Maura Cardarelli
- IBPM-CNR, Dipartimento di Biologia e Biotecnologie, Sapienza Università di Roma, P. le A. Moro 5, 00185 Roma, Italy
| | - Markus Geisler
- University of Fribourg, Department of Biology, CH-1700 Fribourg, Switzerland
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12
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Liu H, Wang Y, Liu L, Wei B, Wang X, Xiao Q, Li Y, Ajayo BS, Huang Y. Pleiotropic ZmICE1 Is an Important Transcriptional Regulator of Maize Endosperm Starch Biosynthesis. FRONTIERS IN PLANT SCIENCE 2022; 13:895763. [PMID: 35937346 PMCID: PMC9355408 DOI: 10.3389/fpls.2022.895763] [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: 03/18/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
Starch, the major component of cereal grains, affects crop yield and quality and is widely used in food and industrial applications. The biosynthesis of maize starch is a complex process involving a series of functional enzymes. However, the sophisticated regulatory mechanisms of starch biosynthetic genes have not been fully elaborated. The basic/helix-loop-helix (bHLH) transcription factors are widely distributed in eukaryotes and participate in many physiological processes. In this study, 202 bHLH encoding genes were identified in the maize genome by Blast method. ZmICE1 gene, which belongs to the ICE subfamily of the bHLH family, was obtained and expressed mainly in maize filling endosperm and co-expressed with 14 starch biosynthesis genes. Based on the comparative analyses across different plant species, we revealed that the gene structures and protein domains of the ICE subfamily were conserved between monocots and dicots, suggesting their functional conservation feature. Yeast activation and subcellular localization assays suggested that ZmICE1 had transcriptional activation activity and localized in the nucleus. Yeast one-hybrid assays confirmed that ZmICE1 could directly bind to the promoters of ZmSSIIa and ZmGBSSI. Transient gene expression analysis in maize endosperm revealed that ZmICE1 positively regulated the expression of ZmSSIIa, but inhibited the expression of ZmGBSSI. Our results indicated that ZmICE1 could function as a regulator of maize starch biosynthesis.
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Affiliation(s)
- Hanmei Liu
- College of Life Science, Sichuan Agricultural University, Ya'an, China
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Yongbin Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Lijun Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Bin Wei
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Xieqin Wang
- College of Life Science, Sichuan Agricultural University, Ya'an, China
| | - Qianlin Xiao
- College of Agronomy and Biotechnology, Southwest University, Chongqing, China
| | - Yangping Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, China
| | | | - Yubi Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, China
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13
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Sinha R, Zandalinas SI, Fichman Y, Sen S, Zeng S, Gómez-Cadenas A, Joshi T, Fritschi FB, Mittler R. Differential regulation of flower transpiration during abiotic stress in annual plants. THE NEW PHYTOLOGIST 2022; 235:611-629. [PMID: 35441705 PMCID: PMC9323482 DOI: 10.1111/nph.18162] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 04/07/2022] [Indexed: 05/10/2023]
Abstract
Heat waves occurring during droughts can have a devastating impact on yield, especially if they happen during the flowering and seed set stages of the crop cycle. Global warming and climate change are driving an alarming increase in the frequency and intensity of combined drought and heat stress episodes, critically threatening global food security. Because high temperature is detrimental to reproductive processes, essential for plant yield, we measured the inner temperature, transpiration, sepal stomatal aperture, hormone concentrations and transcriptomic response of closed soybean flowers developing on plants subjected to a combination of drought and heat stress. Here, we report that, during a combination of drought and heat stress, soybean plants prioritize transpiration through flowers over transpiration through leaves by opening their flower stomata, while keeping their leaf stomata closed. This acclimation strategy, termed 'differential transpiration', lowers flower inner temperature by about 2-3°C, protecting reproductive processes at the expense of vegetative tissues. Manipulating stomatal regulation, stomatal size and/or stomatal density of flowers could serve as a viable strategy to enhance the yield of different crops and mitigate some of the current and future impacts of global warming and climate change on agriculture.
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Affiliation(s)
- Ranjita Sinha
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
| | - Sara I Zandalinas
- Departamento de Ciencias Agrarias y del Medio Natural, Universitat Jaume I, Castelló de la Plana, 12071, Spain
| | - Yosef Fichman
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
| | - Sidharth Sen
- Institute for Data Science and Informatics and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
| | - Shuai Zeng
- Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO, 65211, USA
| | - Aurelio Gómez-Cadenas
- Departamento de Ciencias Agrarias y del Medio Natural, Universitat Jaume I, Castelló de la Plana, 12071, Spain
| | - Trupti Joshi
- Institute for Data Science and Informatics and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
- Department of Health Management and Informatics, and Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Felix B Fritschi
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
| | - Ron Mittler
- Division of Plant Sciences and Technology, College of Agriculture Food and Natural Resources and Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA
- Department of Surgery, University of Missouri School of Medicine, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65201, USA
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14
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Liu J, Bi B, Tian G, Li Z, Wang W, Ma F, Shi H, Liu W. Crystal idioblasts are involved in the anther dehiscence of Nicotiana tabacum. PHYSIOLOGIA PLANTARUM 2022; 174:e13753. [PMID: 36004735 DOI: 10.1111/ppl.13753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/08/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
In Nicotiana tabacum, the degeneration of connective tissue and stomium tissue (the stomium and circular cell cluster [CCC]) is essential for anther dehiscence. Both connective cells and CCC cells are crystal idioblasts, and these cells will undergo degeneration after accumulating calcium oxalate (CaOx) crystals. However, detailed data concerning this process are minimal. Therefore, this study used cellular biological and physiological methods to illustrate this relationship. Results demonstrated that tobacco anther dehiscence is a series of timed programmed cell death (PCD) processes that include the CCC, connective tissue, and stomium. The degenerating crystal idioblasts of the tobacco anther were found to possess two hallmark characteristics that distinguished them from normal PCD cells, namely dynamic changes in CaOx crystals and the appearance of numerous peroxisomes. The accumulation of CaOx and the production of H2 O2 occurred simultaneously or successively before PCD. The peak H2 O2 content was found to appear after the insoluble oxalate. Further, CeCl3 cytochemistry staining was used to detect subcellular H2 O2 , and the precipitate of H2 O2 was primarily present in peroxisomes and around CaOx crystals. These results show that anther dehiscence in N. tabacum is a PCD process in which crystal idioblasts play a vital role in CaOx degradation and H2 O2 production.
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Affiliation(s)
- Jing Liu
- School of Life Science, Northwest University, Xi'an, China
- School of Life Science, Northwest Normal University, Lanzhou, China
| | - Baoxia Bi
- School of Life Science, Northwest University, Xi'an, China
| | - Guanghua Tian
- School of Life Science, Northwest University, Xi'an, China
| | - Ziwei Li
- School of Life Science, Northwest University, Xi'an, China
| | - Weirui Wang
- School of Life Science, Northwest University, Xi'an, China
| | - Fang Ma
- School of Life Science, Northwest University, Xi'an, China
- Institute of Ethnic Preparatory, Ningxia University, Yinchuan, China
| | - Hongyong Shi
- School of Life Science, Guangzhou University, Guangzhou, China
| | - Wenzhe Liu
- School of Life Science, Northwest University, Xi'an, China
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15
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The True Identity of the “Second Pollen Morphology” of Camellia oleifera—Stomium Cells. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8040347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Previous studies on Camellia oleifera pollen morphology have indicated dual morphologies, defined as “dimorphism”. However, they were limited to morphological studies at the end of final development and did not elucidate the origin, structure, and function of the second pollen morphology (striate pollen). In this study, the differences between the two “pollen” types were compared by paraffin sections, scanning electron microscopy (SEM), fluorescence microscopy, and in vitro germination. The results clearly showed that the second pollen type was formed by stomium cells of the anther, which is responsible for anther dehiscence. The nucleus and vesicles of the stomium cell were specifically distributed during anther development, which may be related to the formation of the septum, pollen dispersal activity, and the increase in stomium cell count; at the microscopic level, the stomium cell mainly consisted of the cell wall, large vesicles, and nucleus. The large vesicles facilitate the rapid dehydration of stomium cells under suitable conditions for anther dehiscence. Furthermore, studies on other species of the genus Camellia have suggested that the second type of pollen morphology is pseudopollen, which is capable of partaking in deceptive pollination. The present study refuted this theory and suggested that the pseudopollen are stomium cells, whose structure relates to their function. These results provide the basis for further research on C. oleifera pollen physiology toward the improvement of pollination rates with agricultural practices or breeding interventions.
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16
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Cortez PA, Dos Santos Silva LNN, de Ornellas Paschoalini G, Albuquerque-Pinna J, Sibinelli V, Melo-de-Pinna GFDA. Light and electron microscopies reveal unknown details of the pollen grain structure and physiology from Brazilian Cerrado species. PROTOPLASMA 2022; 259:399-412. [PMID: 34145472 DOI: 10.1007/s00709-021-01671-9] [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: 10/19/2020] [Accepted: 05/18/2021] [Indexed: 06/12/2023]
Abstract
Pollen grains have a relatively simple structure and microscopic size, with two or three cells surrounded by the protective sporoderm at maturity. The viability and efficiency of pollen transport from anther to stigma depends on pollen physiological properties, especially the relative water content of the vegetative cell. Pollen transport is a crucial fate for most angiosperms that depends on biotic pollinators and studies focusing on understanding the morpho-physiological properties of pollen grains are still scarce, especially to tropical open physiognomies as the Brazilian Cerrado. Therefore, we investigate some structural and physiological aspects of pollen grains from six native species naturally growing in one Cerrado area: Campomanesia pubescens (Myrtaceae), Caryocar brasiliense (Caryocaraceae), Erythroxylum campestre (Erythroxylaceae), Lippia lupulina (Verbenaceae), Pyrostegia venusta (Bignoniaceae), and Xylopia aromatica (Annonaceae). We selected dehiscent anthers and mature pollen grains to analyze (1) the anther wall and pollen microstructure, (2) the pollen water status at the time of anther dehiscence, and (3) the pollen chemical compounds. In all analyzed species, the anther and pollen developed in a successfully way, and except for Caryocar brasiliense, all species were able to emit pollen tubes in the germination tests. As expected for a dry and open environment, most species dispersed their pollen grains in a partially dehydrated form, as indicated by our harmomegathy experiment. As indicated by our study, the pollen ability in preventing dissection, maintaining its viability in a dry and hot environment during its transport from anther to stigma, may be related to the sporoderm apertures and to the reserve compounds, mainly carbohydrates in the form of hydrolysable starch grains.
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Affiliation(s)
- Priscila Andressa Cortez
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo-SP, 05508-090, Brazil.
- Centro de Microscopia Eletrônica, Universidade Federal de São Paulo, Rua Botucatu 862, São Paulo-SP, 04023-062, Brazil.
| | | | | | - Julia Albuquerque-Pinna
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo-SP, 05508-090, Brazil
| | - Victor Sibinelli
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo-SP, 05508-090, Brazil
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17
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Silveira SR, Le Gloanec C, Gómez-Felipe A, Routier-Kierzkowska AL, Kierzkowski D. Live-imaging provides an atlas of cellular growth dynamics in the stamen. PLANT PHYSIOLOGY 2022; 188:769-781. [PMID: 34618064 PMCID: PMC8825458 DOI: 10.1093/plphys/kiab363] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
Development of multicellular organisms is a complex process involving precise coordination of growth among individual cells. Understanding organogenesis requires measurements of cellular behaviors over space and time. In plants, such a quantitative approach has been successfully used to dissect organ development in both leaves and external floral organs, such as sepals. However, the observation of floral reproductive organs is hampered as they develop inside tightly closed floral buds, and are therefore difficult to access for imaging. We developed a confocal time-lapse imaging method, applied here to Arabidopsis (Arabidopsis thaliana), which allows full quantitative characterization of the development of stamens, the male reproductive organs. Our lineage tracing reveals the early specification of the filament and the anther. Formation of the anther lobes is associated with a temporal increase of growth at the lobe surface that correlates with intensive growth of the developing locule. Filament development is very dynamic and passes through three distinct phases: (1) initial intense, anisotropic growth, and high cell proliferation; (2) restriction of growth and proliferation to the filament proximal region; and (3) resumption of intense and anisotropic growth, displaced to the distal portion of the filament, without cell proliferation. This quantitative atlas of cellular growth dynamics provides a solid framework for future studies into stamen development.
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Affiliation(s)
- Sylvia R Silveira
- Department of Biological Sciences, IRBV, University of Montréal, Montréal, Quebec, Canada H1X 2B2
| | - Constance Le Gloanec
- Department of Biological Sciences, IRBV, University of Montréal, Montréal, Quebec, Canada H1X 2B2
| | - Andrea Gómez-Felipe
- Department of Biological Sciences, IRBV, University of Montréal, Montréal, Quebec, Canada H1X 2B2
| | | | - Daniel Kierzkowski
- Department of Biological Sciences, IRBV, University of Montréal, Montréal, Quebec, Canada H1X 2B2
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18
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Dervisi I, Haralampidis K, Roussis A. Investigation of the interaction of a papain-like cysteine protease (RD19c) with selenium-binding protein 1 (SBP1) in Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 315:111157. [PMID: 35067295 DOI: 10.1016/j.plantsci.2021.111157] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
AtRD19c is a member of the papain-like cysteine proteases known for its participation in anther development after its maturation by βVPE (vacuolar processing enzyme). This papain-like cysteine protease was identified as an interacting protein of AtSBP1 (selenium binding protein 1) in a yeast two-hybrid screening. To confirm this interaction, we studied AtRD19c with respect to its expression and ability to interact with AtSBP1. The highest gene expression levels of AtRD19c were observed in the roots of 10-day-old seedlings, whereas minimum levels appeared in the hypocotyls of 10-day-old seedlings and flowers. AtRD19c expression was upregulated by selenium, and analysis of its promoter activity showed colocalization of a reporter gene (GUS) with AtSBP1. Additionally, the AtRD19c expression pattern was upregulated in the presence of selenite, indicating its participation in the Se response network. Confocal fluorescence microscopy revealed that AtRD19c localizes in the root tip, lateral roots, and leaf trichomes. Finally, we confirmed the physical interaction between AtRD19c and AtSBP1 and showed the importance of the first 175 aa of the AtSBP1 polypeptide in this interaction. Importantly, the AtRD19c-AtSBP1 interaction was also demonstrated in planta by employing bimolecular fluorescent complementation (BiFC) in a protoplast system.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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19
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Spielmann J, Detry N, Thiébaut N, Jadoul A, Schloesser M, Motte P, Périlleux C, Hanikenne M. ZRT-IRT-Like PROTEIN 6 expression perturbs local ion homeostasis in flowers and leads to anther indehiscence and male sterility. PLANT, CELL & ENVIRONMENT 2022; 45:206-219. [PMID: 34628686 DOI: 10.1111/pce.14200] [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: 01/29/2021] [Revised: 09/22/2021] [Accepted: 09/25/2021] [Indexed: 06/13/2023]
Abstract
Metallic micronutrients are essential throughout the plant life cycle. Maintaining metal homeostasis in plant tissues requires a highly complex and finely tuned network controlling metal uptake, transport, distribution and storage. Zinc and cadmium hyperaccumulation, such as observed in the model plant Arabidopsis halleri, represents an extreme evolution of this network. Here, non-ectopic overexpression of the A. halleri ZIP6 (AhZIP6) gene, encoding a zinc and cadmium influx transporter, in Arabidopsis thaliana enabled examining the importance of zinc for flower development and reproduction. We show that AhZIP6 expression in flowers leads to male sterility resulting from anther indehiscence in a dose-dependent manner. The sterility phenotype is associated to delayed tapetum degradation and endothecium collapse, as well as increased magnesium and potassium accumulation and higher expression of the MHX gene in stamens. It is rescued by the co-expression of the zinc efflux transporter AhHMA4, linking the sterility phenotype to zinc homeostasis. Altogether, our results confirm that AhZIP6 is able to transport zinc in planta and highlight the importance of fine-tuning zinc homeostasis in reproductive organs. The study illustrates how the characterization of metal hyperaccumulation mechanisms can reveal key nodes and processes in the metal homeostasis network.
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Affiliation(s)
- Julien Spielmann
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
| | - Nathalie Detry
- InBioS-PhytoSystems, Laboratory of Plant Physiology, University of Liège, Liège, Belgium
| | - Noémie Thiébaut
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
| | - Alice Jadoul
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
| | - Marie Schloesser
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
| | - Patrick Motte
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
| | - Claire Périlleux
- InBioS-PhytoSystems, Laboratory of Plant Physiology, University of Liège, Liège, Belgium
| | - Marc Hanikenne
- InBioS-PhytoSystems, Functional Genomics and Plant Molecular Imaging, University of Liège, Liège, Belgium
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20
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Sze H, Palanivelu R, Harper JF, Johnson MA. Holistic insights from pollen omics: co-opting stress-responsive genes and ER-mediated proteostasis for male fertility. PLANT PHYSIOLOGY 2021; 187:2361-2380. [PMID: 34601610 PMCID: PMC8644640 DOI: 10.1093/plphys/kiab463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 09/01/2021] [Indexed: 05/15/2023]
Abstract
Sexual reproduction in flowering plants takes place without an aqueous environment. Sperm are carried by pollen through air to reach the female gametophyte, though the molecular basis underlying the protective strategy of the male gametophyte is poorly understood. Here we compared the published transcriptomes of Arabidopsis thaliana pollen, and of heat-responsive genes, and uncovered insights into how mature pollen (MP) tolerates desiccation, while developing and germinating pollen are vulnerable to heat stress. Germinating pollen expresses molecular chaperones or "heat shock proteins" in the absence of heat stress. Furthermore, pollen tubes that grew through pistils at basal temperature showed induction of the endoplasmic reticulum (ER) stress response, which is a characteristic of stressed vegetative tissues. Recent studies show MP contains mRNA-protein (mRNP) aggregates that resemble "stress" granules triggered by heat or other stresses to protect cells. Based on these observations, we postulate that mRNP particles are formed in maturing pollen in response to developmentally programmed dehydration. Dry pollen can withstand harsh conditions as it is dispersed in air. We propose that, when pollen lands on a compatible pistil and hydrates, mRNAs stored in particles are released, aided by molecular chaperones, to become translationally active. Pollen responds to osmotic, mechanical, oxidative, and peptide cues that promote ER-mediated proteostasis and membrane trafficking for tube growth and sperm discharge. Unlike vegetative tissues, pollen depends on stress-protection strategies for its normal development and function. Thus, heat stress during reproduction likely triggers changes that interfere with the normal pollen responses, thereby compromising male fertility. This holistic perspective provides a framework to understand the basis of heat-tolerant strains in the reproduction of crops.
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Affiliation(s)
- Heven Sze
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland 20742, USA
- Author for communication:
| | | | - Jeffrey F Harper
- Department of Biochemistry and Molecular Biology, University of Nevada, Reno, Nevada 89557, USA
| | - Mark A Johnson
- Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, Rhode Island 02912, USA
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21
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Sinha R, Fritschi FB, Zandalinas SI, Mittler R. The impact of stress combination on reproductive processes in crops. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 311:111007. [PMID: 34482910 DOI: 10.1016/j.plantsci.2021.111007] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 07/19/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Historically, extended droughts combined with heat waves caused severe reductions in crop yields estimated at billions of dollars annually. Because global warming and climate change are driving an increase in the frequency and intensity of combined water-deficit and heat stress episodes, understanding how these episodes impact yield is critical for our efforts to develop climate change-resilient crops. Recent studies demonstrated that a combination of water-deficit and heat stress exacerbates the impacts of water-deficit or heat stress on reproductive processes of different cereals and legumes, directly impacting grain production. These studies identified several different mechanisms potentially underlying the effects of stress combination on anthers, pollen, and stigma development and function, as well as fertilization. Here we review some of these findings focusing on unbalanced reactive oxygen accumulation, altered sugar concentrations, and conflicting functions of different hormones, as contributing to the reduction in yield during a combination of water-deficit and heat stress. Future studies focused on the effects of water-deficit and heat stress combination on reproduction of different crops are likely to unravel additional mechanisms, as well as reveal novel ways to develop stress combination-resilient crops. These could mitigate some of the potentially devastating impacts of this stress combination on agriculture.
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Affiliation(s)
- Ranjita Sinha
- Division of Plant Sciences, College of Agriculture Food and Natural Resources, and Interdisciplinary Plant Group, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, USA
| | - Felix B Fritschi
- Division of Plant Sciences, College of Agriculture Food and Natural Resources, and Interdisciplinary Plant Group, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, USA
| | - Sara I Zandalinas
- Division of Plant Sciences, College of Agriculture Food and Natural Resources, and Interdisciplinary Plant Group, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, USA
| | - Ron Mittler
- Division of Plant Sciences, College of Agriculture Food and Natural Resources, and Interdisciplinary Plant Group, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, USA; Department of Surgery, University of Missouri School of Medicine, Christopher S. Bond Life Sciences Center, University of Missouri, 1201 Rollins Street, Columbia, MO, 65201, USA.
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22
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Hu Q, Wang W, Lu Q, Huang J, Peng S, Cui K. Abnormal anther development leads to lower spikelet fertility in rice (Oryza sativa L.) under high temperature during the panicle initiation stage. BMC PLANT BIOLOGY 2021; 21:428. [PMID: 34544370 PMCID: PMC8451141 DOI: 10.1186/s12870-021-03209-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 09/06/2021] [Indexed: 05/10/2023]
Abstract
BACKGROUND Decreased spikelet fertility is often responsible for reduction in grain yield in rice (Oryza sativa L.). In this study, two varieties with different levels of heat tolerance, Liangyoupeijiu (LYPJ, heat susceptible) and Shanyou63 (SY63, heat tolerant) were subjected to two temperature treatments for 28 days during the panicle initiation stage in temperature/relative humidity-controlled greenhouses: high temperature (HT; 37/27 °C; day/night) and control temperature (CK; 31/27 °C; day/night) to investigate changes in anther development under HT during panicle initiation and their relationship with spikelet fertility. RESULTS HT significantly decreased the grain yield of LYPJ by decreasing the number of spikelets per panicle and seed setting percentage. In addition, HT produced minor adverse effects in SY63. The decreased spikelet fertility was primarily attributed to decreased pollen viability and anther dehiscence, as well as poor pollen shedding of the anthers of LYPJ under HT. HT resulted in abnormal anther development (fewer vacuolated microspores, un-degraded tapetum, unevenly distributed Ubisch bodies) and malformation of pollen (obscure outline of the pollen exine with a collapsed bacula, disordered tectum, and no nexine of the pollen walls, uneven sporopollenin deposition on the surface of pollen grains) in LYPJ, which may have lowered pollen viability. Additionally, HT produced a compact knitted anther cuticle structure of the epidermis, an un-degraded septum, a thickened anther wall, unevenly distributed Ubisch bodies, and inhibition of the confluent locule, and these malformed structures may be partially responsible for the decreased anther dehiscence rate and reduced pollen shedding of the anthers in LYPJ. In contrast, the anther wall and pollen development of SY63 were not substantially changed under HT. CONCLUSIONS Our results suggest that disturbed anther walls and pollen development are responsible for the reduced spikelet fertility and grain yield of the tested heat susceptible variety, and noninvasive anthers and pollen formation in response to HT were associated with improved heat tolerance.
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Affiliation(s)
- Qiuqian Hu
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wencheng Wang
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Qifan Lu
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jianliang Huang
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Shaobing Peng
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Kehui Cui
- National Key Laboratory of Crop Genetic Improvement, Ministry of Agriculture Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.
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23
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Canton M, Forestan C, Bonghi C, Varotto S. Meta-analysis of RNA-Seq studies reveals genes with dominant functions during flower bud endo- to eco-dormancy transition in Prunus species. Sci Rep 2021; 11:13173. [PMID: 34162991 PMCID: PMC8222350 DOI: 10.1038/s41598-021-92600-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 06/07/2021] [Indexed: 02/05/2023] Open
Abstract
In deciduous fruit trees, entrance into dormancy occurs in later summer/fall, concomitantly with the shortening of day length and decrease in temperature. Dormancy can be divided into endodormancy, ecodormancy and paradormancy. In Prunus species flower buds, entrance into the dormant stage occurs when the apical meristem is partially differentiated; during dormancy, flower verticils continue their growth and differentiation. Each species and/or cultivar requires exposure to low winter temperature followed by warm temperatures, quantified as chilling and heat requirements, to remove the physiological blocks that inhibit budburst. A comprehensive meta-analysis of transcriptomic studies on flower buds of sweet cherry, apricot and peach was conducted, by investigating the gene expression profiles during bud endo- to ecodormancy transition in genotypes differing in chilling requirements. Conserved and distinctive expression patterns were observed, allowing the identification of gene specifically associated with endodormancy or ecodormancy. In addition to the MADS-box transcription factor family, hormone-related genes, chromatin modifiers, macro- and micro-gametogenesis related genes and environmental integrators, were identified as novel biomarker candidates for flower bud development during winter in stone fruits. In parallel, flower bud differentiation processes were associated to dormancy progression and termination and to environmental factors triggering dormancy phase-specific gene expression.
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Affiliation(s)
- Monica Canton
- Department of Agriculture, Food, Natural resources, Animals and Environment (DAFNAE), University of Padua, Agripolis, Viale dell'Università, 16, 35020, Legnaro, PD, Italy
| | - Cristian Forestan
- Department of Agriculture, Food, Natural resources, Animals and Environment (DAFNAE), University of Padua, Agripolis, Viale dell'Università, 16, 35020, Legnaro, PD, Italy
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Viale Fanin 44, 40127, Bologna, Italy
| | - Claudio Bonghi
- Department of Agriculture, Food, Natural resources, Animals and Environment (DAFNAE), University of Padua, Agripolis, Viale dell'Università, 16, 35020, Legnaro, PD, Italy.
| | - Serena Varotto
- Department of Agriculture, Food, Natural resources, Animals and Environment (DAFNAE), University of Padua, Agripolis, Viale dell'Università, 16, 35020, Legnaro, PD, Italy.
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24
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Chen F, Zheng G, Qu M, Wang Y, Lyu MJA, Zhu XG. Knocking out NEGATIVE REGULATOR OF PHOTOSYNTHESIS 1 increases rice leaf photosynthesis and biomass production in the field. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1836-1849. [PMID: 33258954 DOI: 10.1093/jxb/eraa566] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
Improving photosynthesis is a major approach to increasing crop yield potential. Here we identify a transcription factor as a negative regulator of photosynthesis, which can be manipulated to increase rice photosynthesis and plant biomass in the field. This transcription factor, named negative regulator of photosynthesis 1 (NRP1; Os07g0471900), was identified through a co-expression analysis using rice leaf RNA sequencing data. NRP1 expression showed significantly negative correlation with the expression of many genes involved in photosynthesis. Knocking out NRP1 led to greater photosynthesis and increased biomass in the field, while overexpression of NRP1 decreased photosynthesis and biomass. Transcriptomic data analysis shows that NRP1 can negatively regulate the expression of photosynthetic genes. Protein transactivation experiments show that NRP1 is a transcription activator, implying that NRP1 may indirectly regulate photosynthetic gene expression through an unknown regulator. This study shows that combination of bioinformatics analysis with transgenic testing can be used to identify new regulators to improve photosynthetic efficiency in crops.
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Affiliation(s)
- Faming Chen
- CAS Key Laboratory of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Guangyong Zheng
- Bio-Med Big Data Center, CAS Key Laboratory of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Mingnan Qu
- National Key Laboratory for Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Yanjie Wang
- University of Chinese Academy of Sciences, Beijing, China
- National Key Laboratory for Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Ming-Ju Amy Lyu
- National Key Laboratory for Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
| | - Xin-Guang Zhu
- National Key Laboratory for Plant Molecular Genetics, CAS Center of Excellence for Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China
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25
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Integrated Physiological and Transcriptomic Analyses Reveal a Regulatory Network of Anthocyanin Metabolism Contributing to the Ornamental Value in a Novel Hybrid Cultivar of Camellia Japonica. PLANTS 2020; 9:plants9121724. [PMID: 33297392 PMCID: PMC7762260 DOI: 10.3390/plants9121724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 11/19/2022]
Abstract
Camellia japonica is a plant species with great ornamental and gardening values. A novel hybrid cultivar Chunjiang Hongxia (Camellia japonica cv. Chunjiang Hongxia, CH) possesses vivid red leaves from an early growth stage to a prolonged period and is, therefore, commercially valuable. The molecular mechanism underlying this red-leaf phenotype in C. japonica cv. CH is largely unknown. Here, we investigated the leaf coloration process, photosynthetic pigments contents, and different types of anthocyanin compounds in three growth stages of the hybrid cultivar CH and its parental cultivars. The gene co-expression network and differential expression analysis from the transcriptome data indicated that the changes of leaf color were strongly correlated to the anthocyanin metabolic processes in different leaf growth stages. Genes with expression patterns associated with leaf color changes were also discussed. Together, physiological and transcriptomic analyses uncovered the regulatory network of metabolism processes involved in the modulation of the ornamentally valuable red-leaf phenotype and provided the potential candidate genes for future molecular breeding of ornamental plants such as Camellia japonica.
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26
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Yin X, Yang Y, Lv Y, Li Y, Yang D, Yue Y, Yang Y. BrrICE1.1 is associated with putrescine synthesis through regulation of the arginine decarboxylase gene in freezing tolerance of turnip (Brassica rapa var. rapa). BMC PLANT BIOLOGY 2020; 20:504. [PMID: 33148172 PMCID: PMC7641815 DOI: 10.1186/s12870-020-02697-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 10/12/2020] [Indexed: 06/02/2023]
Abstract
BACKGROUND In the agricultural areas of Qinghai-Tibet Plateau, temperature varies widely from day to night during the growing season, which makes the extreme temperature become one of the limiting factors of crop yield. Turnip (Brassica rapa var. rapa) is a traditional crop of Tibet grown in the Tibet Plateau, but its molecular and metabolic mechanisms of freezing tolerance are unclear. RESULTS Here, based on the changes in transcriptional and metabolic levels of Tibetan turnip under freezing treatment, the expression of the arginine decarboxylase gene BrrADC2.2 exhibited an accumulative pattern in accordance with putrescine content. Moreover, we demonstrated that BrrICE1.1 (Inducer of CBF Expression 1) could directly bind to the BrrADC2.2 promoter, activating BrrADC2.2 to promote the accumulation of putrescine, which was verified by RNAi and overexpression analyses for both BrrADC2.2 and BrrICE1.1 using transgenic hair root. The function of putrescine in turnip was further analyzed by exogenous application putrescine and its inhibitor DL-α-(Difluoromethyl) arginine (DFMA) under freezing tolerance. In addition, the BrrICE1.1 was found to be involved in the ICE1-CBF pathway to increase the freezing stress of turnip. CONCLUSIONS BrrICE1.1 could bind the promoter of BrrADC2.2 or CBFs to participate in freezing tolerance of turnip by transcriptomics and targeted metabolomics analyses. This study revealed the regulatory network of the freezing tolerance process in turnip and increased our understanding of the plateau crops response to extreme environments in Tibet.
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Affiliation(s)
- Xin Yin
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, 650204, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yunqiang Yang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, 650204, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Yanqiu Lv
- Changchun Normal University, Changchun, 130032, China
| | - Yan Li
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, 650204, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Danni Yang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, 650204, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanling Yue
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming, 650201, China
| | - Yongping Yang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming, 650204, China.
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
- Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
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27
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Lippmann R, Babben S, Menger A, Delker C, Quint M. Development of Wild and Cultivated Plants under Global Warming Conditions. Curr Biol 2020; 29:R1326-R1338. [PMID: 31846685 DOI: 10.1016/j.cub.2019.10.016] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Global warming is one of the most detrimental aspects of climate change, affecting plant growth and development across the entire life cycle. This Review explores how different stages of development are influenced by elevated temperature in both wild plants and crops. Starting from seed development and germination, global warming will influence morphological adjustments, termed thermomorphogenesis, and photosynthesis primarily during the vegetative phase, as well as flowering and reproductive development. Where applicable, we distinguish between moderately elevated temperatures that affect all stages of plant development and heat waves that often occur during the reproductive phase when they can have devastating consequences for fruit development. The parallel occurrence of elevated temperature with other abiotic and biotic stressors, particularly the combination of global warming and drought or increased pathogen pressure, will potentiate the challenges for both wild and cultivated plant species. The key components of the molecular networks underlying the physiological processes involved in thermal responses in the model plant Arabidopsis thaliana are highlighted. In crops, temperature-sensitive traits relevant for yield are illustrated for winter wheat (Triticum aestivum L.) and soybean (Glycine max L.), representing cultivated species adapted to temperate vs. warm climate zones, respectively. While the fate of wild plants depends on political agendas, plant breeding approaches informed by mechanistic understanding originating in basic science can enable the generation of climate change-resilient crops.
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Affiliation(s)
- Rebecca Lippmann
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Steve Babben
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Anja Menger
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Carolin Delker
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany.
| | - Marcel Quint
- Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Halle, Germany.
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28
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Wang R, Fang YN, Wu XM, Qing M, Li CC, Xie KD, Deng XX, Guo WW. The miR399- CsUBC24 Module Regulates Reproductive Development and Male Fertility in Citrus. PLANT PHYSIOLOGY 2020; 183:1681-1695. [PMID: 32513835 PMCID: PMC7401139 DOI: 10.1104/pp.20.00129] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 05/28/2020] [Indexed: 05/12/2023]
Abstract
MicroRNA399 (miR399) regulates phosphate homeostasis in plants by down-regulating the expression of PHOSPHATE2 (PHO2, or UBC24 encoding the ubiquitin-conjugating E2 enzyme). We previously identified CsmiR399a.1 in a small RNA sequencing screen of a male-sterile somatic cytoplasmic hybrid (or cybrid) of pummelo (Citrus grandis). Here, we report that miR399 affects reproductive development and male fertility in citrus. Down-regulation of CsmiR399a.1 using a short tandem target mimic (STTM) led to abnormal floral development, inhibition of anther dehiscence, and decreased pollen fertility. When grown in inorganic phosphate (Pi)-sufficient conditions, CsmiR399a.1-STTM plants had lower total phosphorus content in their leaves than the wild type and showed typical symptoms of Pi deficiency. In CsmiR399a.1-STTM plants, the expression of genes involved in starch metabolism and Pi homeostasis was significantly different than in the wild type. Thus, we conclude that miR399-STTM mimicked Pi deficiency, disturbed starch metabolism, and was responsible for pollen grain collapse in the transgenic lines. We identified CsUBC24, a citrus homolog of Arabidopsis (Arabidopsis thaliana) AtUBC24 (PHO2), as a target of CsmiR399a.1 that physically interacts with the floral development regulators SEPALLATA family (CsSEP1.1, CsSEP1.2, and CsSEP3) and the anther dehiscence regulator INDUCER OF CBF EXPRESSION1 (CsICE1). We hypothesize that CsUBC24 downregulates the CsSEPs, which disrupts the floral meristem identity regulatory network and leads to developmental abnormalities in flowers. By interacting with CsICE1, CsUBC24 disturbs stomate function on the anther surface, which inhibits anther dehiscence. These findings indicate that a miR399-based mechanism influences both reproductive development and male fertility in citrus.
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Affiliation(s)
- Rong Wang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Yan-Ni Fang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao-Meng Wu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Mei Qing
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Chao-Chao Li
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Kai-Dong Xie
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiu-Xin Deng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Wen-Wu Guo
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
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29
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Chen T, Zhang W, Yang G, Chen JH, Chen BX, Sun R, Zhang H, An LZ. TRANSTHYRETIN-LIKE and BYPASS1-LIKE co-regulate growth and cold tolerance in Arabidopsis. BMC PLANT BIOLOGY 2020; 20:332. [PMID: 32664862 PMCID: PMC7362626 DOI: 10.1186/s12870-020-02534-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 06/28/2020] [Indexed: 05/13/2023]
Abstract
BACKGROUND Cold stress inhibits normal physiological metabolism in plants, thereby seriously affecting plant development. Meanwhile, plants also actively adjust their metabolism and development to adapt to changing environments. Several cold tolerance regulators have been found to participate in the regulation of plant development. Previously, we reported that BYPASS1-LIKE (B1L), a DUF793 family protein, participates in the regulation of cold tolerance, at least partly through stabilizing C-REPEAT BINDING FACTORS (CBFs). In this study, we found that B1L interacts with TRANSTHYRETIN-LIKE (TTL) protein, which is involved in brassinosteroid (BR)-mediated plant growth and catalyses the synthesis of S-allantoin, and both proteins participate in modulating plant growth and cold tolerance. RESULTS The results obtained with yeast two hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays showed that B1L directly interacted with TTL. Similar to the ttl-1 and ttl-2 mutants, the b1l mutant displayed a longer hypocotyl and greater fresh weight than wild type, whereas B1L-overexpressing lines exhibited a shorter hypocotyl and reduced fresh weight. Moreover, ttl-1 displayed freezing tolerance to cold treatment compared with WT, whereas the b1l mutant and TTL-overexpressing lines were freezing-sensitive. The b1l ttl double mutant had a developmental phenotype and freezing tolerance that were highly similar to those of ttl-1 compared to b1l, indicating that TTL is important for B1L function. Although low concentrations of brassinolide (0.1 or 1 nM) displayed similarly promoted hypocotyl elongation of WT and b1l under normal temperature, it showed less effect to the hypocotyl elongation of b1l than to that of WT under cold conditions. In addition, the b1l mutant also contained less amount of allantoin than Col-0. CONCLUSION Our results indicate that B1L and TTL co-regulate development and cold tolerance in Arabidopsis, and BR and allantoin may participate in these processes through B1L and TTL.
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Affiliation(s)
- Tao Chen
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Wei Zhang
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Gang Yang
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Jia-Hui Chen
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Bi-Xia Chen
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Rui Sun
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Hua Zhang
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China.
| | - Li-Zhe An
- The Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China.
- School of Forestry, Beijing Forestry University, Beijing, 100083, People's Republic of China.
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30
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Kidokoro S, Kim JS, Ishikawa T, Suzuki T, Shinozaki K, Yamaguchi-Shinozaki K. DREB1A/CBF3 Is Repressed by Transgene-Induced DNA Methylation in the Arabidopsis ice1 -1 Mutant. THE PLANT CELL 2020; 32:1035-1048. [PMID: 32034036 PMCID: PMC7145508 DOI: 10.1105/tpc.19.00532] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 12/17/2019] [Accepted: 02/03/2020] [Indexed: 05/22/2023]
Abstract
DREB1/CBFs are key transcription factors involved in plant cold stress adaptation. The expression of DREB1/CBFs triggers a cold-responsive transcriptional cascade, after which many stress tolerance genes are expressed. Thus, elucidating the mechanisms of cold stress-inducible DREB1/CBF expression is important to understand the molecular mechanisms of plant cold stress responses and tolerance. We analyzed the roles of a transcription factor, INDUCER OF CBF EXPRESSION1 (ICE1), that is well known as an important transcriptional activator in the cold-inducible expression of DREB1A/CBF3 in Arabidopsis (Arabidopsis thaliana). ice1-1 is a widely accepted mutant allele known to abolish cold-inducible DREB1A expression, and this evidence has strongly supported ICE1-DREB1A regulation for many years. However, in ice1-1 outcross descendants, we unexpectedly discovered that ice1-1 DREB1A repression was genetically independent of the ice1-1 allele ICE1(R236H). Moreover, neither ICE1 overexpression nor double loss-of-function mutation of ICE1 and its homolog SCRM2 altered DREB1A expression. Instead, a transgene locus harboring a reporter gene in the ice1-1 genome was responsible for altering DREB1A expression. The DREB1A promoter was hypermethylated due to the transgene. We showed that DREB1A repression in ice1-1 results from transgene-induced silencing and not genetic regulation by ICE1. The ICE1(R236H) mutation has also been reported as scrm-D, which confers constitutive stomatal differentiation. The scrm-D phenotype and the expression of a stomatal differentiation marker gene were confirmed to be linked to the ICE1(R236H) mutation. We propose that the current ICE1-DREB1 regulatory model should be revalidated without the previous assumptions.
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Affiliation(s)
- Satoshi Kidokoro
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - June-Sik Kim
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Tsukuba, Ibaraki 305-0074, Japan
| | - Tomona Ishikawa
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Takamasa Suzuki
- College of Bioscience and Biotechnology, Chubu University, Matsumoto-cho, Kasugai, Aichi, 478-8501, Japan
| | - Kazuo Shinozaki
- Gene Discovery Research Group, RIKEN Center for Sustainable Resource Science, Tsukuba, Ibaraki 305-0074, Japan
| | - Kazuko Yamaguchi-Shinozaki
- Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
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Lugassi N, Kelly G, Arad T, Farkash C, Yaniv Y, Yeselson Y, Schaffer AA, Raveh E, Granot D, Carmi N. Expression of Hexokinase in Stomata of Citrus Fruit Reduces Fruit Transpiration and Affects Seed Development. FRONTIERS IN PLANT SCIENCE 2020; 11:255. [PMID: 32211009 PMCID: PMC7068913 DOI: 10.3389/fpls.2020.00255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
The temporal formation and spatial distribution of stomata on the surface of citrus floral organs and, specifically, on the ovule from which the fruit develops, were analyzed using citrus plants that express green fluorescent protein (GFP) under the guard cell-specific KST1 promoter. Stomata are found on the style, sepal, and anther of the closed flower and on ovules from the stage of anthesis. It has previously been shown that hexokinase (HXK) mediates sugar-sensing in leaf guard cells and stimulates stomatal closure. The activity and response of citrus fruit stomata to sugar-sensing by HXK was examined using plants that express HXK under the KST1 promoter. Those plants are referred to as GCHXK plants. The transpiration of young green GCHXK citrus fruits was significantly reduced, indicating that their stomata respond to sugar similar to leaf stomata. Toward fruit maturation, fruit stomata are plugged and stop functioning, which explains why WT and GCHXK mature yellow fruits exhibited similar water loss. Seeds of the GCHXK plants were smaller and germinated more slowly than the WT seeds. We suggest that the stomata of young green citrus fruits, but not mature yellow fruits, respond to sugar levels via HXK and that fruit stomata are important for proper seed development.
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Affiliation(s)
- Nitsan Lugassi
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Gilor Kelly
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Tal Arad
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Chagai Farkash
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Yossi Yaniv
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Yelena Yeselson
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Arthur A. Schaffer
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Eran Raveh
- Department of Fruit Tree Sciences, Institute of Plant Sciences, Agricultural Research Organization, Gilat Research Center, Negev, Israel
| | - David Granot
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
| | - Nir Carmi
- Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel
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32
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The SWI/SNF ATP-Dependent Chromatin Remodeling Complex in Arabidopsis Responds to Environmental Changes in Temperature-Dependent Manner. Int J Mol Sci 2020; 21:ijms21030762. [PMID: 31979421 PMCID: PMC7037086 DOI: 10.3390/ijms21030762] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 01/13/2023] Open
Abstract
SWI/SNF ATP-dependent chromatin remodeling complexes (CRCs) play important roles in the regulation of transcription, cell cycle, DNA replication, repair, and hormone signaling in eukaryotes. The core of SWI/SNF CRCs composed of a SWI2/SNF2 type ATPase, a SNF5 and two of SWI3 subunits is sufficient for execution of nucleosome remodeling in vitro. The Arabidopsis genome encodes four SWI2/SNF2 ATPases, four SWI3, a single SNF5 and two SWP73 subunits. Genes of the core SWI/SNF components have critical but not fully overlapping roles during plant growth, embryogenesis, and sporophyte development. Here we show that the Arabidopsis swi3c mutant exhibits a phenotypic reversion when grown at lower temperature resulting in partial restoration of its embryo, root development and fertility defects. Our data indicates that the swi3c mutation alters the expression of several genes engaged in low temperature responses. The location of SWI3C-containing SWI/SNF CRCs on the ICE1, MYB15 and CBF1 target genes depends on the temperature conditions, and the swi3c mutation thus also influences the transcription of several cold-responsive (COR) genes. These findings, together with genetic analysis of swi3c/ice1 double mutant and enhanced freezing tolerance of swi3c plants illustrate that SWI/SNF CRCs contribute to fine-tuning of plant growth responses to different temperature regimes.
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Acosta IF, Przybyl M. Jasmonate Signaling during Arabidopsis Stamen Maturation. PLANT & CELL PHYSIOLOGY 2019; 60:2648-2659. [PMID: 31651948 PMCID: PMC6896695 DOI: 10.1093/pcp/pcz201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
The last stages of stamen development, collectively called stamen maturation, encompass pollen viability, filament elongation and anther dehiscence or opening. These processes are essential for male fertility in Arabidopsis and require the function of jasmonate signaling. There is a good understanding of jasmonate synthesis, perception and transcriptional outputs in Arabidopsis stamens. In addition, the spatiotemporal localization of jasmonate signaling components at the tissue and cellular levels has started to emerge in recent years. However, the ultimate cellular functions activated by jasmonate to promote stamen maturation remain unknown. The hormones auxin and gibberellin have been proposed to control the activation of jasmonate synthesis to promote stamen maturation, although we hypothesize that this action is rather indirect. In this review, we examine these different areas, attempt to clarify some confusing aspects found in the literature and raise testable hypothesis that may help to further understand how jasmonate controls male fertility in Arabidopsis.
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Affiliation(s)
- Ivan F Acosta
- Max Planck Institute for Plant Breeding Research, Carl-von-Linn�-Weg 10, 50829 Cologne, Germany
| | - Marine Przybyl
- Max Planck Institute for Plant Breeding Research, Carl-von-Linn�-Weg 10, 50829 Cologne, Germany
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Lyu X, Chen S, Liao N, Liu J, Hu Z, Yang J, Zhang M. Characterization of watermelon anther and its programmed cell death-associated events during dehiscence under cold stress. PLANT CELL REPORTS 2019; 38:1551-1561. [PMID: 31463555 DOI: 10.1007/s00299-019-02466-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 08/19/2019] [Indexed: 05/13/2023]
Abstract
The 'neglected' thermophile fruit crop of watermelon was first used as a model crop to study the PCD associated with anther dehiscence in cold-exposed condition during anther development. Anther dehiscence ensures normal pollen release and successful fertilization at fruit-setting stages in flowering plants. However, most researches pertinent to anther dehiscence are centered on model plant and/or major field crops under optimal growth condition. Due to anther indehiscence in cold condition, crop plants of thermophile tropical or subtropical fruit crops fail to accomplish timely pollination and fertilization, resulting in a great yield loss annually. Herein, we developed an ideal model crop for studying the programmed cell death (PCD) associated with anther dehiscence under low-temperature stress using the S-shaped spiral anther in watermelon as instead. Our results revealed that, including the tapetal cell layers, both cells of the interlocular septum and the stomium were blocked in PCD associated with anther dehiscence at 15 °C. Likewise, TUNEL assays visualized the evidence that low temperature at 15 °C interferes with not only the PCD of tapetal cells, but also the PCD of interlocular septum and stomium. Furthermore, the expressions of genes correlated with PCD of tapetum and stomium were significantly inhibited at 15 °C, suggesting that low temperature affects anther dehiscence by inhibiting PCD of sporophytic tissue-related gene expressions. The findings of the current research provide mechanistic insights into anther indehiscence leading to poor fruit-setting for thermophile fruit crop such as watermelon under adverse cold condition in flowering.
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Affiliation(s)
- Xiaolong Lyu
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
| | - Shuna Chen
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
| | - Nanqiao Liao
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
| | - Jie Liu
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
| | - Zhongyuan Hu
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
- Key Laboratory of Horticultural Plant Growth, Development & Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, People's Republic of China
| | - Jinghua Yang
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China
- Key Laboratory of Horticultural Plant Growth, Development & Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, People's Republic of China
| | - Mingfang Zhang
- Laboratory of Germplasm Innovation and Molecular Breeding, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhang Road, Hangzhou, 310058, People's Republic of China.
- Key Laboratory of Horticultural Plant Growth, Development & Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, People's Republic of China.
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35
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Santiago JP, Sharkey TD. Pollen development at high temperature and role of carbon and nitrogen metabolites. PLANT, CELL & ENVIRONMENT 2019; 42:2759-2775. [PMID: 31077385 DOI: 10.1111/pce.13576] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/06/2019] [Accepted: 05/06/2019] [Indexed: 05/11/2023]
Abstract
Fruit and seed crop production heavily relies on successful stigma pollination, pollen tube growth, and fertilization of female gametes. These processes depend on production of viable pollen grains, a process sensitive to high-temperature stress. Therefore, rising global temperatures threaten worldwide crop production. Close observation of plant development shows that high-temperature stress causes morpho-anatomical changes in male reproductive tissues that contribute to reproductive failure. These changes include early tapetum degradation, anther indehiscence, and deformity of pollen grains, all of which are contributing factors to pollen fertility. At the molecular level, reactive oxygen species (ROS) accumulate when plants are subjected to high temperatures. ROS is a signalling molecule that can be beneficial or detrimental for plant cells depending on its balance with the endogenous cellular antioxidant system. Many metabolites have been linked with ROS over the years acting as direct scavengers or molecular stabilizers that promote antioxidant enzyme activity. This review highlights recent advances in research on anther and pollen development and how these might explain the aberrations seen during high-temperature stress; recent work on the role of nitrogen and carbon metabolites in anther and pollen development is discussed including their potential role at high temperature.
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Affiliation(s)
- James P Santiago
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan, 48824
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan, 48824
| | - Thomas D Sharkey
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan, 48824
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, 48824
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan, 48824
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36
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Zheng L, Nagpal P, Villarino G, Trinidad B, Bird L, Huang Y, Reed JW. miR167 limits anther growth to potentiate anther dehiscence. Development 2019; 146:dev.174375. [PMID: 31262724 DOI: 10.1242/dev.174375] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 06/21/2019] [Indexed: 01/28/2023]
Abstract
In flowering plants, anther dehiscence and pollen release are essential for sexual reproduction. Anthers dehisce after cell wall degradation weakens stomium cell junctions in each anther locule, and desiccation creates mechanical forces that open the locules. Either effect or both together may break stomium cell junctions. The microRNA miR167 negatively regulates ARF6 and ARF8, which encode auxin response transcription factors. Arabidopsis mARF6 or mARF8 plants with mutated miR167 target sites have defective anther dehiscence and ovule development. Null mir167a mutations recapitulated mARF6 and mARF8 anther and ovule phenotypes, indicating that MIR167a is the main miR167 precursor gene that delimits ARF6 and ARF8 expression in these organs. Anthers of mir167a or mARF6/8 plants overexpressed genes encoding cell wall loosening functions associated with cell expansion, and grew larger than wild-type anthers did starting at flower stage 11. Experimental desiccation enabled dehiscence of miR167-deficient anthers, indicating competence to dehisce. Conversely, high humidity conditions delayed anther dehiscence in wild-type flowers. These results support a model in which miR167-mediated anther growth arrest permits anther dehiscence. Without miR167 regulation, excess anther growth delays dehiscence by prolonging desiccation.
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Affiliation(s)
- Lanjie Zheng
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA.,College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Punita Nagpal
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Gonzalo Villarino
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA
| | - Brendan Trinidad
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Laurina Bird
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA
| | - Yubi Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Jason W Reed
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3280, USA .,Laboratoire de Reproduction et Developpement des Plantes, Ecole Normale Superieure de Lyon, 69342 Lyon, France
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Hu Y, Han X, Yang M, Zhang M, Pan J, Yu D. The Transcription Factor INDUCER OF CBF EXPRESSION1 Interacts with ABSCISIC ACID INSENSITIVE5 and DELLA Proteins to Fine-Tune Abscisic Acid Signaling during Seed Germination in Arabidopsis. THE PLANT CELL 2019; 31:1520-1538. [PMID: 31123050 PMCID: PMC6635857 DOI: 10.1105/tpc.18.00825] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 04/19/2019] [Accepted: 05/06/2019] [Indexed: 05/04/2023]
Abstract
ABSCISIC ACID INSENSITIVE5 (ABI5) is a crucial regulator of abscisic acid (ABA) signaling pathways involved in repressing seed germination and postgerminative growth in Arabidopsis (Arabidopsis thaliana). ABI5 is precisely modulated at the posttranslational level; however, the transcriptional regulatory mechanisms underlying ABI5 and its interacting transcription factors remain largely unknown. Here, we found that INDUCER OF CBF EXPRESSION1 (ICE1) physically associates with ABI5. ICE1 negatively regulates ABA responses during seed germination and directly suppresses ABA-responsive LATE EMBRYOGENESIS ABUNDANT6 (EM6) and EM1 expression. Genetic analysis demonstrated that the ABA-hypersensitive phenotype of the ice1 mutant requires ABI5. ICE1 interferes with the transcriptional activity of ABI5 to mediate downstream regulons. Importantly, ICE1 also interacts with DELLA proteins, which stimulate ABI5 during ABA signaling. Disruption of ICE1 partially restored the ABA-hyposensitive phenotype of the della mutant, gai-t6 rga-t2 rgl1-1 rgl2-1, indicating that ICE1 functions antagonistically with DELLA in ABA signaling. Consistently, DELLA proteins repress ICE1's transcriptional function and the antagonistic effect of ICE1 on ABI5. Collectively, our study demonstrates that ICE1 antagonizes ABI5 and DELLA activity to maintain the appropriate level of ABA signaling during seed germination, providing a mechanistic understanding of how ABA signaling is fine-tuned by a transcriptional complex involving ABI5 and its interacting partners.
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Affiliation(s)
- Yanru Hu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Xiao Han
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Milian Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Minghui Zhang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinjing Pan
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Diqiu Yu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
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Pacini E, Dolferus R. Pollen Developmental Arrest: Maintaining Pollen Fertility in a World With a Changing Climate. FRONTIERS IN PLANT SCIENCE 2019; 10:679. [PMID: 31178886 PMCID: PMC6544056 DOI: 10.3389/fpls.2019.00679] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 05/06/2019] [Indexed: 05/07/2023]
Abstract
During evolution of land plants, the haploid gametophytic stage has been strongly reduced in size and the diploid sporophytic phase has become the dominant growth form. Both male and female gametophytes are parasitic to the sporophyte and reside in separate parts of the flower located either on the same plant or on different plants. For fertilization to occur, bi-cellular or tri-cellular male gametophytes (pollen grains) have to travel to the immobile female gametophyte in the ovary. To survive exposure to a hostile atmosphere, pollen grains are thought to enter a state of complete or partial developmental arrest (DA). DA in pollen is strongly associated with acquisition of desiccation tolerance (DT) to extend pollen viability during air travel, but occurrence of DA in pollen is both species-dependent and at the same time strongly dependent on the reigning environmental conditions at the time of dispersal. Several environmental stresses (heat, drought, cold, humidity) are known to affect pollen production and viability. Climate change is also posing a serious threat to plant reproductive behavior and crop productivity. It is therefore timely to gain a better understanding of how DA and pollen viability are controlled in plants and how pollen viability can be protected to secure crop yields in a changing environment. Here, we provide an overview of how DA and pollen viability are controlled and how the environment affects them. We make emphasis on what is known and areas where a deeper understanding is needed.
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Affiliation(s)
- Ettore Pacini
- Department of Life Sciences, University of Siena, Siena, Italy
| | - Rudy Dolferus
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, Canberra, ACT, Australia
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Abstract
Stomata are structures on the surfaces of most land plants that are required for gas exchange between plants and their environment. In Arabidopsis thaliana, stomata comprise two kidney bean-shaped epidermal guard cells that flank a central pore overlying a cavity in the mesophyll. These guard cells can adjust their shape to occlude or facilitate access to this pore, and in so doing regulate the release of water vapor and oxygen from the plant, in exchange for the intake of carbon dioxide from the atmosphere. Stomatal guard cells are the end product of a specialized lineage whose cell divisions and fate transitions ensure both the production and pattern of cells in aerial epidermal tissues. The stomatal lineage is dynamic and flexible, altering stomatal production in response to environmental change. As such, the stomatal lineage is an excellent system to study how flexible developmental transitions are regulated in plants. In this Cell Science at a Glance article and accompanying poster, we will summarize current knowledge of the divisions and fate decisions during stomatal development, discussing the role of transcriptional regulators, cell-cell signaling and polarity proteins. We will highlight recent work that links the core regulators to systemic or environmental information and provide an evolutionary perspective on stomata lineage regulators in plants.
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Affiliation(s)
- Laura R Lee
- Biology Department, Stanford University, Stanford, CA, USA 94305-5020
| | - Dominique C Bergmann
- Biology Department, Stanford University, Stanford, CA, USA 94305-5020
- Howard Hughes Medical Institute, Stanford, CA, USA 94305
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