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Zhang L, Wang L, Fang Y, Gao Y, Yang S, Su J, Ni J, Teng Y, Bai S. Phosphorylated transcription factor PuHB40 mediates ROS-dependent anthocyanin biosynthesis in pear exposed to high light. THE PLANT CELL 2024; 36:3562-3583. [PMID: 38842382 PMCID: PMC11371158 DOI: 10.1093/plcell/koae167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 05/15/2024] [Accepted: 06/03/2024] [Indexed: 06/07/2024]
Abstract
Plants are increasingly vulnerable to environmental stresses because of global warming and climate change. Stress-induced reactive oxygen species (ROS) accumulation results in plant cell damage, even cell death. Anthocyanins are important antioxidants that scavenge ROS to maintain ROS homeostasis. However, the mechanism underlying ROS-induced anthocyanin accumulation is unclear. In this study, we determined that the HD-Zip I family member transcription factor PuHB40 mediates ROS-dependent anthocyanin biosynthesis under high-light stress in pear (Pyrus ussuriensis). Specifically, PuHB40 induces the PuMYB123-like-PubHLH3 transcription factor complex for anthocyanin biosynthesis. The PuHB40-mediated transcriptional activation depends on its phosphorylation level, which is regulated by protein phosphatase PP2A. Elevated ROS content maintains high PuHB40 phosphorylation levels while also enhancing the PuHB40-induced PuMYB123-like transcription by decreasing the PuPP2AA2 expression, ultimately leading to increased anthocyanin biosynthesis. Our study reveals a pathway regulating the ROS-induced anthocyanin biosynthesis in pears, further clarifying the mechanism underlying the abiotic stress-induced anthocyanin biosynthesis, which may have implications for improving plant stress tolerance.
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Affiliation(s)
- Lu Zhang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Lu Wang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Yongchen Fang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Yuhao Gao
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Shulin Yang
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Jun Su
- Institute of Horticulture, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
| | - Junbei Ni
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Yuanwen Teng
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
- Hainan Institute of Zhejiang University, Sanya, Hainan 572000, China
| | - Songling Bai
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, Zhejiang, China
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Ren A, Wen T, Xu X, Wu J, Zhao G. Cotton HD-Zip I transcription factor GhHB4-like regulates the plant response to salt stress. Int J Biol Macromol 2024; 278:134857. [PMID: 39168205 DOI: 10.1016/j.ijbiomac.2024.134857] [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: 03/24/2024] [Revised: 08/14/2024] [Accepted: 08/17/2024] [Indexed: 08/23/2024]
Abstract
Soil salinity is a major environmental constraint to plant production. The homeodomain-leucine zipper I (HD-Zip I) transcription factors play a crucial role in growth, development and defence responses of plants. However, the function and underlying mechanism of HD-Zip I in cotton remain unexplored. This study investigated the role of GhHB4-like, a cotton HD-Zip I gene, in plant tolerance to salt stress. Ectopic expression of GhHB4-like gene enhanced, while its silencing impaired the salt tolerance in Arabidopsis. Y1H and effector-reporter assays revealed that GhHB4-like activated the expression of GhNAC007, which is essential for salt resistance. Knock-down of GhNAC007 also impaired salt resistance of cotton plants. In addition, GhHB4-like-GhNAC007 might have positively regulated the expression of GhMYB96 and ABA signalling-related genes, thereby leading to enhanced salt resistance. Interestingly, deleting motifs 3 and 5 near the 3'-end of GhHB4-like significantly enhanced GhNAC007 activation, indicating that both motifs acted as transcriptional activation inhibitory domains. The results suggest that GhHB4-like-GhNAC007 regulated plant response to salt stress, potentially by modulating GhMYB96 and ABA signalling-related genes.
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Affiliation(s)
- Aiping Ren
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Tianyang Wen
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Xiao Xu
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Jiahe Wu
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; State Key Laboratory of Plant Genomics, Institute of Microbiology Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Ge Zhao
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China.
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Scialò E, Sicilia A, Continella A, Gentile A, Lo Piero AR. Transcriptome Profiling and Weighted Gene Correlation Network Analysis Reveal Hub Genes and Pathways Involved in the Response to Polyethylene-Glycol-Induced Drought Stress of Two Citrus Rootstocks. BIOLOGY 2024; 13:595. [PMID: 39194533 DOI: 10.3390/biology13080595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 08/02/2024] [Accepted: 08/06/2024] [Indexed: 08/29/2024]
Abstract
Agriculture faces the dual challenge of increasing food production and safeguarding the environment. Climate change exacerbates this challenge, reducing crop yield and biomass due to drought stress, especially in semi-arid regions where Citrus plants are cultivated. Understanding the molecular mechanisms underlying drought tolerance in Citrus is crucial for developing adaptive strategies. Plants of two citrus rootstocks, Carrizo Citrange and Bitters (C22), were grown in aerated half-strength Hoagland's nutrient solution. Post-acclimation, the plants were exposed to a solution containing 0% (control) or 15% PEG-8000 for 10 days. Leaf malonyl dialdehyde (MDA) and hydrogen peroxide (H2O2) content were measured to assess the reached oxidative stress level. Total RNA was extracted, sequenced, and de novo-assembled. Weighted Gene Correlation Network Analysis (WGCNA) was conducted to examine the relationship between gene expression patterns and the levels of MDA and H2O2 used as oxidative stress indicators. Plant visual inspection and MDA and H2O2 contents clearly indicate that Bitters is more tolerant than Carrizo towards PEG-induced drought stress. RNA-Seq analysis revealed a significantly higher number of differentially expressed genes (DEGs) in Carrizo (6092) than in Bitters (320), with most being associated with drought sensing, ROS scavenging, osmolyte biosynthesis, and cell wall metabolism. Moreover, the WGCNA identified transcription factors significantly correlated with MDA and H2O2 levels, thus providing insights into drought-coping strategies and offering candidate genes for enhancing citrus drought tolerance.
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Affiliation(s)
- Emanuele Scialò
- Department of Agriculture, Food and Environment, University of Catania, 951213 Catania, Italy
| | - Angelo Sicilia
- Department of Agriculture, Food and Environment, University of Catania, 951213 Catania, Italy
| | - Alberto Continella
- Department of Agriculture, Food and Environment, University of Catania, 951213 Catania, Italy
| | - Alessandra Gentile
- Department of Agriculture, Food and Environment, University of Catania, 951213 Catania, Italy
| | - Angela Roberta Lo Piero
- Department of Agriculture, Food and Environment, University of Catania, 951213 Catania, Italy
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Hu M, Zhao S, Zhao Y, Lu M, Song X. PagKNAT2/6b regulates tension wood formation and gravitropism by targeting cytokinin metabolism. TREE PHYSIOLOGY 2024; 44:tpae090. [PMID: 39030690 DOI: 10.1093/treephys/tpae090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 06/21/2024] [Accepted: 07/18/2024] [Indexed: 07/21/2024]
Abstract
Tension wood is a specialized xylem tissue associated with gravitropism in angiosperm trees. However, few regulators of tension wood formation have been identified. The molecular mechanisms underpinning tension wood formation remain elusive. Here, we report that a Populus KNOTTED-like homeobox gene, PagKNAT2/6b, is involved in tension wood formation and gravity response. Transgenic poplar plants overexpressing PagKNAT2/6b displayed more sensitive gravitropism than controls, as indicated by increased stem curvature. Microscopic examination revealed greater abundance of fibre cells with a gelatinous cell wall layer (G-layer) and asymmetric growth of secondary xylem in PagKNAT2/6b overexpression lines. Conversely, PagKNAT2/6b dominant repression plants exhibited decreased tension wood formation and reduced response to gravity stimulation. Moreover, sensitivity to gravity stimulation showed a negative relationship with development stage. Expression of genes related to growth and senescence was affected in PagKNAT2/6b transgenic plants. More importantly, transcription activation and electrophoretic mobility shift assays suggested that PagKNAT2/6b promotes the expression of cytokinin metabolism genes. Consistently, cytokinin content was increased in PagKNAT2/6b overexpression plants. Therefore, PagKNAT2/6b is involved in gravitropism and tension wood formation, likely via modulation of cytokinin metabolism.
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Affiliation(s)
- Mengxuan Hu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Haidian District, Beijing 100091, China
| | - Shutang Zhao
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Haidian District, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Longpan Road, Xuanwu District, Nanjing, Jiangsu 210037, China
| | - Yanqiu Zhao
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Haidian District, Beijing 100091, China
- School of Agriculture, Ludong University, Hongqizhong Road, Zhifu District, Yantai 264025, China
| | - Mengzhu Lu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Haidian District, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Longpan Road, Xuanwu District, Nanjing, Jiangsu 210037, China
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang Agriculture & Forestry University, Wusu Street, Linan District, Hangzhou 311300, China
| | - Xueqin Song
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Road, Haidian District, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Longpan Road, Xuanwu District, Nanjing, Jiangsu 210037, China
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Zhang QY, Ma CN, Gu KD, Wang JH, Yu JQ, Liu B, Wang Y, He JX, Hu DG, Sun Q. The BTB-BACK-TAZ domain protein MdBT2 reduces drought resistance by weakening the positive regulatory effect of MdHDZ27 on apple drought tolerance via ubiquitination. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 119:283-299. [PMID: 38606500 DOI: 10.1111/tpj.16761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/13/2024]
Abstract
Drought stress is one of the dominating challenges to the growth and productivity in crop plants. Elucidating the molecular mechanisms of plants responses to drought stress is fundamental to improve fruit quality. However, such molecular mechanisms are poorly understood in apple (Malus domestica Borkh.). In this study, we explored that the BTB-BACK-TAZ protein, MdBT2, negatively modulates the drought tolerance of apple plantlets. Moreover, we identified a novel Homeodomain-leucine zipper (HD-Zip) transcription factor, MdHDZ27, using a yeast two-hybrid (Y2H) screen with MdBT2 as the bait. Overexpression of MdHDZ27 in apple plantlets, calli, and tomato plantlets enhanced their drought tolerance by promoting the expression of drought tolerance-related genes [responsive to dehydration 29A (MdRD29A) and MdRD29B]. Biochemical analyses demonstrated that MdHDZ27 directly binds to and activates the promoters of MdRD29A and MdRD29B. Furthermore, in vitro and in vivo assays indicate that MdBT2 interacts with and ubiquitinates MdHDZ27, via the ubiquitin/26S proteasome pathway. This ubiquitination results in the degradation of MdHDZ27 and weakens the transcriptional activation of MdHDZ27 on MdRD29A and MdRD29B. Finally, a series of transgenic analyses in apple plantlets further clarified the role of the relationship between MdBT2 and MdHDZ27, as well as the effect of their interaction on drought resistance in apple plantlets. Collectively, our findings reveal a novel mechanism by which the MdBT2-MdHDZ27 regulatory module controls drought tolerance, which is of great significance for enhancing the drought resistance of apple and other plants.
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Affiliation(s)
- Quan-Yan Zhang
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, Shandong, 276000, China
| | - Chang-Ning Ma
- National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Kai-Di Gu
- National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Jia-Hui Wang
- National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Jian-Qiang Yu
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Bo Liu
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, Shandong, 276000, China
| | - Yun Wang
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, Shandong, 276000, China
| | - Jun-Xia He
- Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi, Shandong, 276000, China
| | - Da-Gang Hu
- National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Quan Sun
- National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China
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6
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Wang Q, Wang Y, Zhang F, Han C, Wang Y, Ren M, Qi K, Xie Z, Zhang S, Tao S, Shiratake K. Genome-wide characterisation of HD-Zip transcription factors and functional analysis of PbHB24 during stone cell formation in Chinese white pear (Pyrus bretschneideri). BMC PLANT BIOLOGY 2024; 24:444. [PMID: 38778247 PMCID: PMC11112822 DOI: 10.1186/s12870-024-05138-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
BACKGROUND The homodomain-leucine zipper (HD-Zip) is a conserved transcription factor family unique to plants that regulate multiple developmental processes including lignificaion. Stone cell content is a key determinant negatively affecting pear fruit quality, which causes a grainy texture of fruit flesh, because of the lignified cell walls. RESULTS In this study, a comprehensive bioinformatics analysis of HD-Zip genes in Chinese white pear (Pyrus bretschneideri) (PbHBs) was performed. Genome-wide identification of the PbHB gene family revealed 67 genes encoding PbHB proteins, which could be divided into four subgroups (I, II, III, and IV). For some members, similar intron/exon structural patterns support close evolutionary relationships within the same subgroup. The functions of each subgroup of the PbHB family were predicted through comparative analysis with the HB genes in Arabidopsis and other plants. Cis-element analysis indicated that PbHB genes might be involved in plant hormone signalling and external environmental responses, such as light, stress, and temperature. Furthermore, RNA-sequencing data and quantitative real-time PCR (RT-qPCR) verification revealed the regulatory roles of PbHB genes in pear stone cell formation. Further, co-expression network analysis revealed that the eight PbHB genes could be classified into different clusters of co-expression with lignin-related genes. Besides, the biological function of PbHB24 in promoting stone cell formation has been demonstrated by overexpression in fruitlets. CONCLUSIONS This study provided the comprehensive analysis of PbHBs and highlighted the importance of PbHB24 during stone cell development in pear fruits.
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Affiliation(s)
- Qi Wang
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
- Laboratory of Horticultural Science, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yueyang Wang
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fanhang Zhang
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chengyang Han
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanling Wang
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Mei Ren
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kaijie Qi
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhihua Xie
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shaoling Zhang
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shutian Tao
- Sanya Institute, College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Katsuhiro Shiratake
- Laboratory of Horticultural Science, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan.
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Żyła N, Cieśla A, Szała L, Babula-Skowrońska D. Functional and regulatory diversity of homeobox-leucine zipper transcription factors BnaHB6 under dehydration and salt stress in Brassica napus L. PLANT MOLECULAR BIOLOGY 2024; 114:59. [PMID: 38750303 PMCID: PMC11096223 DOI: 10.1007/s11103-024-01465-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 05/07/2024] [Indexed: 05/18/2024]
Abstract
The plant-specific homeodomain-leucine zipper I subfamily is involved in the regulation of various biological processes, particularly growth, development and stress response. In the present study, we characterized four BnaHB6 homologues from Brassica napus. All BnaHB6 proteins have transcriptional activation activity. Structural and functional data indicate the complex role of BnaHB6 genes in regulating biological processes, with some functions conserved and others diverged. Transcriptional analyzes revealed that they are induced in a similar manner in different tissues but show different expression patterns in response to stress and circadian rhythm. Only the BnaA09HB6 and BnaC08HB6 genes are expressed under dehydration and salt stress, and in darkness. The partial transcriptional overlap of BnaHB6s with the evolutionarily related genes BnaHB5 and BnaHB16 was also observed. Transgenic Arabidopsis thaliana plants expressing a single proBnaHB6::GUS partially confirmed the expression results. Bioinformatic analysis allowed the identification of TF-binding sites in the BnaHB6 promoters that may control their expression under stress and circadian rhythm. ChIP-qPCR analysis revealed that BnaA09HB6 and BnaC08HB6 bind directly to the promoters of the target genes BnaABF4 and BnaDREB2A. Comparison of their expression patterns in the WT plants and the bnac08hb6 mutant showed that BnaC08HB6 positively regulates the expression of the BnaABF4 and BnaDREB2A genes under dehydration and salt stress. We conclude that four BnaHB6 homologues have distinct functions in response to stress despite high sequence similarity, possibly indicating different binding preferences with BnaABF4 and BnaDREB2A. We hypothesize that BnaC08HB6 and BnaA09HB6 function in a complex regulatory network under stress.
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Affiliation(s)
- Natalia Żyła
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479, Poznań, Poland
| | - Agata Cieśla
- Laboratory of Biotechnology, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Laurencja Szała
- Department of Oilseed Crops, Poznań Division, Plant Breeding and Acclimatization Institute-National Research Institute in Radzików, Strzeszyńska 36, 60‑479, Poznań, Poland
| | - Danuta Babula-Skowrońska
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479, Poznań, Poland.
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8
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Wu Z, Li T, Zhang Y, Zhang D, Teng N. HD-Zip I protein LlHOX6 antagonizes homeobox protein LlHB16 to attenuate basal thermotolerance in lily. PLANT PHYSIOLOGY 2024; 194:1870-1888. [PMID: 37930281 DOI: 10.1093/plphys/kiad582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 09/28/2023] [Accepted: 10/10/2023] [Indexed: 11/07/2023]
Abstract
Homeodomain-leucine zipper (HD-Zip) I transcription factors are crucial for plant responses to drought, salt, and cold stresses. However, how they are associated with thermotolerance remains mostly unknown. We previously demonstrated that lily (Lilium longiflorum) LlHB16 (HOMEOBOX PROTEIN 16) promotes thermotolerance, whereas the roles of other HD-Zip I members are still unclear. Here, we conducted a transcriptomic analysis and identified a heat-responsive HD-Zip I gene, LlHOX6 (HOMEOBOX 6). We showed that LlHOX6 represses the establishment of basal thermotolerance in lily. LlHOX6 expression was rapidly activated by high temperature, and its protein localized to the nucleus. Heterologous expression of LlHOX6 in Arabidopsis (Arabidopsis thaliana) and overexpression in lily reduced their basal thermotolerance. In contrast, silencing LlHOX6 in lily elevated basal thermotolerance. Cooverexpressing or cosilencing LlHOX6 and LlHB16 in vivo compromised their functions in modulating basal thermotolerance. LlHOX6 interacted with itself and with LlHB16, although heterologous interactions were stronger than homologous ones. Notably, LlHOX6 directly bounds DNA elements to repress the expression of the LlHB16 target genes LlHSFA2 (HEAT STRESS TRANSCRIPTION FACTOR A2) and LlMBF1c (MULTIPROTEIN BRIDGING FACTOR 1C). Moreover, LlHB16 activated itself to form a positive feedback loop, while LlHOX6 repressed LlHB16 expression. The LlHOX6-LlHB16 heterooligomers exhibited stronger DNA binding to compete for LlHB16 homooligomers, thus weakening the transactivation ability of LlHB16 for LlHSFA2 and LlMBF1c and reducing its autoactivation. Altogether, our findings demonstrate that LlHOX6 interacts with LlHB16 to limit its transactivation, thereby impairing heat stress responses in lily.
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Affiliation(s)
- Ze Wu
- Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland Administration, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
- Lily Department in Jiangsu Graduate Workstation of Nanjing Agricultural University and Nanjing Oriole Island Modern Agricultural Development Co., Ltd., Nanjing 210043, China
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Ting Li
- Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland Administration, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
- Lily Department in Jiangsu Graduate Workstation of Nanjing Agricultural University and Nanjing Oriole Island Modern Agricultural Development Co., Ltd., Nanjing 210043, China
| | - Yinyi Zhang
- Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland Administration, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
- Lily Department in Jiangsu Graduate Workstation of Nanjing Agricultural University and Nanjing Oriole Island Modern Agricultural Development Co., Ltd., Nanjing 210043, China
| | - Dehua Zhang
- Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland Administration, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
- Lily Department in Jiangsu Graduate Workstation of Nanjing Agricultural University and Nanjing Oriole Island Modern Agricultural Development Co., Ltd., Nanjing 210043, China
| | - Nianjun Teng
- Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, Key Laboratory of Biology of Ornamental Plants in East China, National Forestry and Grassland Administration, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
- Lily Department in Jiangsu Graduate Workstation of Nanjing Agricultural University and Nanjing Oriole Island Modern Agricultural Development Co., Ltd., Nanjing 210043, China
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9
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Shu J, Zhang L, Liu G, Wang X, Liu F, Zhang Y, Chen Y. Transcriptome Analysis and Metabolic Profiling Reveal the Key Regulatory Pathways in Drought Stress Responses and Recovery in Tomatoes. Int J Mol Sci 2024; 25:2187. [PMID: 38396864 PMCID: PMC10889177 DOI: 10.3390/ijms25042187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/05/2023] [Accepted: 12/30/2023] [Indexed: 02/25/2024] Open
Abstract
Drought stress is a major abiotic factor affecting tomato production and fruit quality. However, the genes and metabolites associated with tomato responses to water deficiency and rehydration are poorly characterized. To identify the functional genes and key metabolic pathways underlying tomato responses to drought stress and recovery, drought-susceptible and drought-tolerant inbred lines underwent transcriptomic and metabolomic analyses. A total of 332 drought-responsive and 491 rehydration-responsive core genes were robustly differentially expressed in both genotypes. The drought-responsive and rehydration-responsive genes were mainly related to photosynthesis-antenna proteins, nitrogen metabolism, plant-pathogen interactions, and the MAPK signaling pathway. Various transcription factors, including homeobox-leucine zipper protein ATHB-12, NAC transcription factor 29, and heat stress transcription factor A-6b-like, may be vital for tomato responses to water status. Moreover, 24,30-dihydroxy-12(13)-enolupinol, caffeoyl hawthorn acid, adenosine 5'-monophosphate, and guanosine were the key metabolites identified in both genotypes under drought and recovery conditions. The combined transcriptomic and metabolomic analysis highlighted the importance of 38 genes involved in metabolic pathways, the biosynthesis of secondary metabolites, the biosynthesis of amino acids, and ABC transporters for tomato responses to water stress. Our results provide valuable clues regarding the molecular basis of drought tolerance and rehydration. The data presented herein may be relevant for genetically improving tomatoes to enhance drought tolerance.
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Affiliation(s)
- Jinshuai Shu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, 12 Zhongguancun Nandajie Street, Beijing 100081, China; (X.W.); (F.L.); (Y.Z.); (Y.C.)
| | - Lili Zhang
- Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (L.Z.); (G.L.)
| | - Guiming Liu
- Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Institute of Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (L.Z.); (G.L.)
| | - Xiaoxuan Wang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, 12 Zhongguancun Nandajie Street, Beijing 100081, China; (X.W.); (F.L.); (Y.Z.); (Y.C.)
| | - Fuzhong Liu
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, 12 Zhongguancun Nandajie Street, Beijing 100081, China; (X.W.); (F.L.); (Y.Z.); (Y.C.)
| | - Ying Zhang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, 12 Zhongguancun Nandajie Street, Beijing 100081, China; (X.W.); (F.L.); (Y.Z.); (Y.C.)
| | - Yuhui Chen
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture, 12 Zhongguancun Nandajie Street, Beijing 100081, China; (X.W.); (F.L.); (Y.Z.); (Y.C.)
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10
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Li C, Zhang H, Qi Y, Zhao Y, Duan C, Wang Y, Meng Z, Zhang Q. Genome-wide identification of PYL/PYR-PP2C (A)-SnRK2 genes in Eutrema and their co-expression analysis in response to ABA and abiotic stresses. Int J Biol Macromol 2023; 253:126701. [PMID: 37673165 DOI: 10.1016/j.ijbiomac.2023.126701] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
ABA signaling core components PYR/PYL, group A PP2C and SnRK2 play important roles in various environmental stress responses of plants. This study identified 14 PYR/PYL, 9 PP2C (A), and 10 SnRK2 genes from halophytic Eutrema. Phylogenetic analysis showed 4 EsPYR/PYL, 4 EsPP2C (A) and 3 EsSnRK2 subfamilies characterized, which was supported by their gene structures and protein motifs. Large-scale segmental duplication event was demonstrated to be a major contributor to expansion of the EsPYL-PP2C (A)-SnRK2 gene families. Synteny relationship analysis revealed more orthologous PYL-PP2C (A)-SnRK2 gene pairs located in collinear blocks between Eutrema and Brassica than that between Eutrema and Arabidopsis. RNA-seq and qRT-PCR revealed EsABI1, EsABI2 and EsHAL2 showed a significantly up-regulated expression in leaves and roots in response to ABA, NaCl or cold stress. Three markedly co-expression modules of ABA/R-brown, NaCl/L-lightsteelblue1 and Cold/R-lightgreen were uncovered to contain EsPYL-PP2C (A)-SnRK2 genes by WGCNA analysis. GO and KEGG analysis indicated that the genes of ABA/R-brown module containing EsHAB1, EsHAI2 and EsSnRK2.6 were enriched in proteasome pathway. Further, EsHAI2-OE transgenic Arabidopsis lines showed significantly enhanced seeds germination and seedlings growth. This work provides a new insight for elucidating potential molecular functions of PYL-PP2C (A)-SnRK2 responding to ABA and abiotic stresses.
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Affiliation(s)
- Chuanshun Li
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Hengyang Zhang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China; Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China
| | - Yuting Qi
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Yaoyao Zhao
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China; Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China
| | - Chonghao Duan
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China; Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China
| | - Yujiao Wang
- Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China
| | - Zhe Meng
- Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China.
| | - Quan Zhang
- Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Sciences, Shandong Normal University, Jinan, China; Research team of plant pathogen microbiology and immunology, College of Life Science, Shandong Normal University, Jinan, China.
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11
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Maeda N, Matsuta F, Noguchi T, Fujii A, Ishida H, Kitagawa Y, Ishikawa A. The Homeodomain-Leucine Zipper Subfamily I Contributes to Leaf Age- and Time-Dependent Resistance to Pathogens in Arabidopsis thaliana. Int J Mol Sci 2023; 24:16356. [PMID: 38003546 PMCID: PMC10671646 DOI: 10.3390/ijms242216356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 11/11/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
In Arabidopsis thaliana (Arabidopsis), nonhost resistance (NHR) is influenced by both leaf age and the moment of inoculation. While the circadian clock and photoperiod have been linked to the time-dependent regulation of NHR in Arabidopsis, the mechanism underlying leaf age-dependent NHR remains unclear. In this study, we investigated leaf age-dependent NHR to Pyricularia oryzae in Arabidopsis. Our findings revealed that this NHR type is regulated by both miR156-dependent and miR156-independent pathways. To identify the key players, we utilized rice-FOX Arabidopsis lines and identified the rice HD-Zip I OsHOX6 gene. Notably, OsHOX6 expression confers robust NHR to P. oryzae and Colletotrichum nymphaeae in Arabidopsis, with its effect being contingent upon leaf age. Moreover, we explored the role of AtHB7 and AtHB12, the Arabidopsis closest homologues of OsHOX6, by studying mutants and overexpressors in Arabidopsis-C. higginsianum interaction. AtHB7 and AtHB12 were found to contribute to both penetration resistance and post-penetration resistance to C. higginsianum in a leaf age- and time-dependent manner. These findings highlight the involvement of HD-Zip I AtHB7 and AtHB12, well-known regulators of development and abiotic stress responses, in biotic stress responses in Arabidopsis.
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Affiliation(s)
| | | | | | | | | | | | - Atsushi Ishikawa
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Fukui 910-1195, Japan
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12
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Żyła N, Babula-Skowrońska D. Evolutionary Consequences of Functional and Regulatory Divergence of HD-Zip I Transcription Factors as a Source of Diversity in Protein Interaction Networks in Plants. J Mol Evol 2023; 91:581-597. [PMID: 37351602 PMCID: PMC10598176 DOI: 10.1007/s00239-023-10121-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 05/27/2023] [Indexed: 06/24/2023]
Abstract
The HD superfamily has been studied in detail for several decades. The plant-specific HD-Zip I subfamily attracts the most attention because of its involvement in plant development and stress responses. In this review, we provide a comprehensive insight into the evolutionary events responsible for the functional redundancy and diversification of the HD-Zip I genes in regulating various biological processes. We summarized the evolutionary history of the HD-Zip family, highlighting the important role of WGDs in its expansion and divergence of retained duplicates in the genome. To determine the relationship between the evolutionary origin and functional conservation of HD-Zip I in different species, we performed a phylogenetic analysis, compared their expression profiles in different tissues and under stress and traced the role of orthologs and paralogs in regulating developmental processes. We found that HD-Zip I from different species have similar gene structures with a highly conserved HD and Zip, bind to the same DNA sequences and are involved in similar biological processes. However, they exhibit a functional diversity, which is manifested in altered expression patterns. Some of them are involved in the regulation of species-specific leaf morphology and phenotypes. Here, we discuss the role of changes in functional domains involved in DNA binding and protein interaction of HD-Zip I and in cis-regulated regions of its target genes in promoting adaptive innovations through the formation of de novo regulatory systems. Understanding the role of the HD-Zip I subfamily in organism-environment interactions remains a challenge for evolutionary developmental biology (evo-devo).
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Affiliation(s)
- Natalia Żyła
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479, Poznan, Poland
| | - Danuta Babula-Skowrońska
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479, Poznan, Poland.
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13
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Kitavi M, Gemenet DC, Wood JC, Hamilton JP, Wu S, Fei Z, Khan A, Buell CR. Identification of genes associated with abiotic stress tolerance in sweetpotato using weighted gene co-expression network analysis. PLANT DIRECT 2023; 7:e532. [PMID: 37794882 PMCID: PMC10546384 DOI: 10.1002/pld3.532] [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: 01/28/2023] [Revised: 04/22/2023] [Accepted: 08/31/2023] [Indexed: 10/06/2023]
Abstract
Sweetpotato, Ipomoea batatas (L.), a key food security crop, is negatively impacted by heat, drought, and salinity stress. The orange-fleshed sweetpotato cultivar "Beauregard" was exposed to heat, salt, and drought treatments for 24 and 48 h to identify genes responding to each stress condition in leaves. Analysis revealed both common (35 up regulated, 259 down regulated genes in the three stress conditions) and unique sets of up regulated (1337 genes by drought, 516 genes by heat, and 97 genes by salt stress) and down regulated (2445 genes by drought, 678 genes by heat, and 204 genes by salt stress) differentially expressed genes (DEGs) suggesting common, yet stress-specific transcriptional responses to these three abiotic stressors. Gene Ontology analysis of down regulated DEGs common to both heat and salt stress revealed enrichment of terms associated with "cell population proliferation" suggestive of an impact on the cell cycle by the two stress conditions. To identify shared and unique gene co-expression networks under multiple abiotic stress conditions, weighted gene co-expression network analysis was performed using gene expression profiles from heat, salt, and drought stress treated 'Beauregard' leaves yielding 18 co-expression modules. One module was enriched for "response to water deprivation," "response to abscisic acid," and "nitrate transport" indicating synergetic crosstalk between nitrogen, water, and phytohormones with genes encoding osmotin, cell expansion, and cell wall modification proteins present as key hub genes in this drought-associated module. This research lays the groundwork for exploring to a further degree, mechanisms for abiotic stress tolerance in sweetpotato.
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Affiliation(s)
- Mercy Kitavi
- Research Technology Support Facility (RTSF)Michigan State UniversityEast LansingMichiganUSA
- Center for Applied Genetic TechnologiesUniversity of GeorgiaAthensGeorgiaUSA
| | - Dorcus C. Gemenet
- International Potato CenterLimaPeru
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF HouseNairobiKenya
| | - Joshua C. Wood
- Center for Applied Genetic TechnologiesUniversity of GeorgiaAthensGeorgiaUSA
| | - John P. Hamilton
- Center for Applied Genetic TechnologiesUniversity of GeorgiaAthensGeorgiaUSA
- Department of Crop & Soil SciencesUniversity of GeorgiaAthensGeorgiaUSA
| | - Shan Wu
- Boyce Thompson InstituteCornell UniversityIthacaNew YorkUSA
| | - Zhangjun Fei
- Boyce Thompson InstituteCornell UniversityIthacaNew YorkUSA
| | - Awais Khan
- International Potato CenterLimaPeru
- Present address:
Plant Pathology and Plant‐Microbe Biology Section, School of Integrative Plant ScienceCornell UniversityGenevaNew YorkUSA
| | - C. Robin Buell
- Center for Applied Genetic TechnologiesUniversity of GeorgiaAthensGeorgiaUSA
- Department of Crop & Soil SciencesUniversity of GeorgiaAthensGeorgiaUSA
- Institute of Plant Breeding, Genetics, & GenomicsUniversity of GeorgiaAthensGeorgiaUSA
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14
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Lei Y, Hannoufa A, Yu P. Effect of Transparent Testa8 (TT8) gene and Homeobox12 (HB12) gene silencing in alfalfa (Medicago sativa L.) on molecular structure spectral profile in relation to energy, degradation, and fermentation characteristics in ruminant systems. ANIMAL NUTRITION 2023. [DOI: 10.1016/j.aninu.2023.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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15
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Xu H, Wang S, Larkin RM, Zhang F. The transcription factors DcHB30 and DcWRKY75 antagonistically regulate ethylene-induced petal senescence in carnation (Dianthus caryophyllus). JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:7326-7343. [PMID: 36107792 DOI: 10.1093/jxb/erac357] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Although numerous transcription factors with antagonistic activities have been shown to contribute to growth and development, whether and how they regulate senescence in plants is largely unknown. In this study, we investigated the role of antagonistic transcription factors in petal senescence in carnation (Dianthus caryophyllus), one of the most common types of ethylene-sensitive cut flowers produced worldwide. We identified DcHB30 that encodes a ZF-HD transcription factor that is down-regulated in ethylene-treated petal transcriptomes. We found that silencing DcHB30 accelerated ethylene-induced petal senescence and that DcHB30 physically interacts with DcWRKY75, a positive regulator of ethylene-induced petal senescence. Phenotypic characterization and molecular evidence indicated that DcHB30 and DcWRKY75 competitively regulate the expression of their co-targeted genes DcACS1, DcACO1, DcSAG12, and DcSAG29 by reciprocally inhibiting the DNA-binding activity of each other on the gene promoters. This transcriptional regulation mechanism demonstrates that these transcription factors serve as positive and negative regulators in ethylene-induced petal senescence in carnation. Thus, our study provides insights into how antagonizing transcription factors regulate plant senescence.
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Affiliation(s)
- Han Xu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- National R&D Center for Citrus Preservation, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Siqi Wang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- National R&D Center for Citrus Preservation, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Robert M Larkin
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Hongshan Laboratory, Wuhan 430070, China
| | - Fan Zhang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- National R&D Center for Citrus Preservation, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Hongshan Laboratory, Wuhan 430070, China
- Key Laboratory of Huazhong Urban Agriculture, Ministry of Agriculture and Rural Affairs, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
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16
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Wang Y, Fan J, Wu X, Guan L, Li C, Gu T, Li Y, Ding J. Genome-Wide Characterization and Expression Profiling of HD-Zip Genes in ABA-Mediated Processes in Fragaria vesca. PLANTS (BASEL, SWITZERLAND) 2022; 11:3367. [PMID: 36501406 PMCID: PMC9737017 DOI: 10.3390/plants11233367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Members of homeodomain-leucine zipper (HD-Zip) transcription factors can play their roles by modulating abscisic acid (ABA) signaling in Arabidopsis. So far, our knowledge of the functions of HD-Zips in woodland strawberries (Fragaria vesca), a model plant for studying ABA-mediated fruit ripening, is limited. Here, we identified a total of 31 HD-Zip genes (FveHDZ1-31) in F. vesca, and classified them into four subfamilies (I to IV). Promoter analyses show that the ABA-responsive element, ABRE, is prevalent in the promoters of subfamily I and II FveHDZs. RT-qPCR results demonstrate that 10 of the 14 investigated FveHDZs were consistently >1.5-fold up-regulated or down-regulated in expression in response to exogenous ABA, dehydration, and ABA-induced senescence in leaves. Five of the six consistently up-regulated genes are from subfamily I and II. Thereinto, FveHDZ4, and 20 also exhibited significantly enhanced expression along with increased ABA content during fruit ripening. In yeast one-hybrid assays, FveHDZ4 proteins could bind the promoter of an ABA signaling gene FvePP2C6. Collectively, our results strongly support that the FveHDZs, particularly those from subfamilies I and II, are involved in the ABA-mediated processes in F. vesca, providing a basis for further functional characterization of the HD-Zips in strawberry and other plants.
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Affiliation(s)
- Yong Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
| | - Junmiao Fan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
| | - Xinjie Wu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
| | - Ling Guan
- Institute of Pomology, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China
| | - Chun Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
| | - Tingting Gu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
| | - Yi Li
- Department of Plant Science and Landscape Architecture, University of Connecticut, Storrs, CT 06269, USA
| | - Jing Ding
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210023, China
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17
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Liu X, Li A, Wang S, Lan C, Wang Y, Li J, Zhu J. Overexpression of Pyrus sinkiangensis HAT5 enhances drought and salt tolerance, and low-temperature sensitivity in transgenic tomato. FRONTIERS IN PLANT SCIENCE 2022; 13:1036254. [PMID: 36420018 PMCID: PMC9676457 DOI: 10.3389/fpls.2022.1036254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
The homeodomain-leucine zipper protein HAT belongs to the homeodomain leucine zipper subfamily (HD-Zip) and is important for regulating plant growth and development and stress tolerance. To investigate the role of HAT5 in tolerance to drought, salt, and low temperature stress, we selected a HAT gene from Pyrus sinkiangensis Yü (Pyrus sinkiangensis T.T. Yu). The sequences were analyzed using ioinformatics, and the overexpressed tomato lines were obtained using molecular biology techniques. The phenotypes, physiological, and biochemical indexes of the wild-type and transgenic tomato lines were observed under different stress conditions. We found that the gene had the highest homology with PbrHAT5. Under drought and NaCl stress, osmotic regulatory substances (especially proline) were significantly accumulated, and antioxidant enzyme activities were enhanced. The malondialdehyde level and relative electrical conductivity of transgenic tomatoes under low temperature (freezing) stress were significantly higher than those of wild-type tomatoes. The reactive oxygen species scavenging system was unbalanced. This study found that PsHAT5 improved the tolerance of tomatoes to drought and salt stress by regulating proline metabolism and oxidative stress ability, reducing the production of reactive oxygen species, and maintaining normal cell metabolism. In conclusion, the PsHAT5 transcription factor has great potential in crop resistance breeding, which lays a theoretical foundation for future excavation of effective resistance genes of the HD-Zip family and experimental field studies.
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Affiliation(s)
| | | | | | | | | | - Jin Li
- *Correspondence: Jianbo Zhu, ; Jin Li,
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18
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Wang K, Xu L, Wang Y, Ying J, Li J, Dong J, Li C, Zhang X, Liu L. Genome-wide characterization of homeodomain-leucine zipper genes reveals RsHDZ17 enhances the heat tolerance in radish (Raphanus sativus L.). PHYSIOLOGIA PLANTARUM 2022; 174:e13789. [PMID: 36183327 DOI: 10.1111/ppl.13789] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 09/06/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Homeodomain-leucine zipper (HD-Zip) transcription factors are involved in various biological processes of plant growth, development, and abiotic stress response. However, how they regulate heat stress (HS) response remains largely unclear in plants. In this study, a total of 83 RsHD-Zip genes were firstly identified from the genome of Raphanus sativus. RNA-Seq, RT-qPCR and promoter activity assays revealed that RsHDZ17 from HD-Zip Class I was highly expressed under heat, salt, and Cd stresses. RsHDZ17 is a nuclear protein with transcriptional activity at the C-terminus. Ectopic overexpression (OE) of RsHDZ17 in Arabidopsis thaliana enhanced the HS tolerance by improving the survival rate, photosynthesis capacity, and scavenging for reactive oxygen species (ROS). In addition, transient OE of RsHDZ17 in radish cotyledons impeded cell injury and augmented ROS scavenging under HS. Moreover, yeast one-hybrid, dual-luciferase assay, and electrophoretic mobility shift assay revealed that RsHDZ17 could bind to the promoter of HSFA1e. Collectively, these pieces of evidence demonstrate that RsHDZ17 could play a positive role in thermotolerance, partially through up-regulation of the expression of HSFA1e in plants. These results provide novel insights into the role of HD-Zips in radish and facilitate genetical engineering and development of heat-tolerant radish in breeding programs.
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Affiliation(s)
- Kai Wang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Liang Xu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Yan Wang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Jiali Ying
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Jingxue Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Junhui Dong
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Cui Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Xiaoli Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Liwang Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, People's Republic of China
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Bano N, Fakhrah S, Mohanty CS, Bag SK. Transcriptome Meta-Analysis Associated Targeting Hub Genes and Pathways of Drought and Salt Stress Responses in Cotton ( Gossypium hirsutum): A Network Biology Approach. FRONTIERS IN PLANT SCIENCE 2022; 13:818472. [PMID: 35548277 PMCID: PMC9083274 DOI: 10.3389/fpls.2022.818472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 03/21/2022] [Indexed: 06/12/2023]
Abstract
Abiotic stress tolerance is an intricate feature controlled through several genes and networks in the plant system. In abiotic stress, salt, and drought are well known to limit cotton productivity. Transcriptomics meta-analysis has arisen as a robust method to unravel the stress-responsive molecular network in crops. In order to understand drought and salt stress tolerance mechanisms, a meta-analysis of transcriptome studies is crucial. To confront these issues, here, we have given details of genes and networks associated with significant differential expression in response to salt and drought stress. The key regulatory hub genes of drought and salt stress conditions have notable associations with functional drought and salt stress-responsive (DSSR) genes. In the network study, nodulation signaling pathways 2 (NSP2), Dehydration-responsive element1 D (DRE1D), ethylene response factor (ERF61), cycling DOF factor 1 (CDF1), and tubby like protein 3 (TLP3) genes in drought and tubby like protein 1 (TLP1), thaumatin-like proteins (TLP), ethylene-responsive transcription factor ERF109 (EF109), ETS-Related transcription Factor (ELF4), and Arabidopsis thaliana homeodomain leucine-zipper gene (ATHB7) genes in salt showed the significant putative functions and pathways related to providing tolerance against drought and salt stress conditions along with the significant expression values. These outcomes provide potential candidate genes for further in-depth functional studies in cotton, which could be useful for the selection of an improved genotype of Gossypium hirsutum against drought and salt stress conditions.
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Affiliation(s)
- Nasreen Bano
- CSIR-National Botanical Research Institute (CSIR-NBRI), Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Shafquat Fakhrah
- CSIR-National Botanical Research Institute (CSIR-NBRI), Lucknow, India
- Department of Botany, University of Lucknow, Lucknow, India
| | - Chandra Sekhar Mohanty
- CSIR-National Botanical Research Institute (CSIR-NBRI), Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Sumit Kumar Bag
- CSIR-National Botanical Research Institute (CSIR-NBRI), Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Mehmood M, Khan MJ, Khan MJ, Akhtar N, Mughal F, Shah STA, Hyder MZ, Farrakh S, Sadiq I. Systematic analysis of HD-ZIP transcription factors in sesame genome and gene expression profiling of SiHD-ZIP class I entailing drought stress responses at early seedling stage. Mol Biol Rep 2022; 49:2059-2071. [PMID: 34993726 DOI: 10.1007/s11033-021-07024-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 11/26/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Sesame is an ancient oilseed crop, known for its high oil content and quality. Its sensitivity to drought at early seedling stage is one of the limiting factors affecting its world-wide growth and productivity. Among plant specific transcription factors, the association of HD-ZIPs with sesame drought responses at early seedling stage is not well-established yet and is very important to develop our molecular understanding on sesame drought tolerance. METHODS AND RESULTS In this study, total 61 sesame HD-ZIP proteins were identified, based on their protein sequence homology with Arabidopsis and protein domain(s) architecture prediction, followed by their phylogenetic, conserved domain(s) motifs and gene structure analyses to classify them into four classes (HD-ZIP Class I-IV). HD-ZIP Class I was also subdivided into four subgroups: α (SiHZ25, SiHZ43, SiHZ9 and SiHZ16), β1 (SiHZ10, SiHZ30, SiHZ32 and SiHZ26), β2 (SiHZ42 and SiHZ45) and γ (SiHZ17, SiHZ7 and SiHZ35) by a comparative phylogenetic analysis of sesame with Arabidopsis and maize. Afterwards, twenty-one days old sesame seedlings were exposed to drought stress by withholding water for 7 days (when soil moisture content reduced to ~16%) and gene expression of HD-ZIP Class I (13 members) was performed in well- watered (control) and drought stressed seedlings. The gene expression analysis showed that the expressions of SiHZ7 (6.8 fold) and SiHZ35 (2.6 fold) from γ subgroup were significantly high in drought seedlings. CONCLUSIONS This study is useful in demonstrating the role of SiHD-ZIP Class I in sesame drought responses at early seedling stage and to develop its novel drought tolerant varieties.
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Affiliation(s)
- Maryam Mehmood
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | - Muhammad Jadoon Khan
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | - Muhammad Jawad Khan
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | - Nadeem Akhtar
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | - Fizza Mughal
- Illinois Informatics Institute, University of Illinois, Urbana-Champaign, USA
| | - Syed Tahir Abbas Shah
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | | | - Sumaira Farrakh
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan.
| | - Irfan Sadiq
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan.
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21
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Jiao P, Jiang Z, Wei X, Liu S, Qu J, Guan S, Ma Y. Overexpression of the homeobox-leucine zipper protein ATHB-6 improves the drought tolerance of maize (Zea mays L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 316:111159. [PMID: 35151445 DOI: 10.1016/j.plantsci.2021.111159] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/14/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Homeo-Leucine Zipper (HD-Zip) proteins are a class of transcription factors unique to higher plants and are involved in plant stress responses and regulation of growth and development. However, the function of maize HD-Zip genes in enhancing drought tolerance is unknown. Here, Sub-Cellular Localization results showed that ATHB-6 fusion proteins were only localized in the nucleus. The malondialdehyde content was lower than the wild type under drought tolerance, proving that the introduction of the ATHB-6 gene can improve the drought tolerance of plants. Follow-up analysis showed that ATHB-6 could promote root growth and activities of a series of ROS-scavenging enzymes in maize. Moreover, overexpression of ATHB-6 in maize activated the expression of critical genes in the ROS signals pathway and ABA-dependent pathway under drought tolerance.Our results provides a significant advancement in undestanding the functions of HD-Zip transcription factors in maize.
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Affiliation(s)
- Peng Jiao
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China
| | - Zhenzhong Jiang
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China
| | - Xiaotong Wei
- College of Life Sciences, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China
| | - Siyan Liu
- College of Agronomy, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China
| | - Jing Qu
- College of Agronomy, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China
| | - Shuyan Guan
- College of Agronomy, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China.
| | - Yiyong Ma
- College of Agronomy, Jilin Agricultural University, Changchun, China; Joint Laboratory of Intemational Cooperation in Modem Agricultural Technology of Ministry of Educaltion, Jilin Agricultural University, Changchun, China.
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22
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Elnaggar A, Mosa KA, Ramamoorthy K, El-Keblawy A, Navarro T, Soliman SSM. De novo transcriptome sequencing, assembly, and gene expression profiling of a salt-stressed halophyte (Salsola drummondii) from a saline habitat. PHYSIOLOGIA PLANTARUM 2021; 173:1695-1714. [PMID: 34741316 DOI: 10.1111/ppl.13591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 09/30/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
Salsola drummondii is a perennial habitat-indifferent halophyte growing in saline and nonsaline habitats of the Arabian hyperarid deserts. It offers an invaluable opportunity to examine the molecular mechanisms of salt tolerance. The present study was conducted to elucidate these mechanisms through transcriptome profiling of seedlings grown from seeds collected in a saline habitat. The Illumina Hiseq 2500 platform was employed to sequence cDNA libraries prepared from shoots and roots of nonsaline-treated plants (controls) and plants treated with 1200 mM NaCl. Transcriptomic comparison between salt-treated and control samples resulted in 17,363 differentially expressed genes (DEGs), including 12,000 upregulated genes (7870 in roots, 4130 in shoots) and 5363 downregulated genes (4258 in roots and 1105 in shoots). The majority of identified DEGs are known to be involved in transcription regulation (79), signal transduction (82), defense metabolism (101), transportation (410), cell wall metabolism (27), regulatory processes (392), respiration (85), chaperoning (9), and ubiquitination (98) during salt tolerance. This study identified potential genes associated with the salt tolerance of S. drummondii and demonstrated that this tolerance may depend on the induction of certain genes in shoot and root tissues. These gene expressions were validated using reverse-transcription quantitative PCR, the results of which were consistent with transcriptomics results. To the best of our knowledge, this is the first study providing genetic information on salt tolerance mechanisms in S. drummondii.
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Affiliation(s)
- Attiat Elnaggar
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, UAE
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
- Departmento de Botanica y Fisiologia Vegetal, Universidad de Málaga, Málaga, Spain
| | - Kareem A Mosa
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, UAE
- Department of Biotechnology, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
| | - Kalidoss Ramamoorthy
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, UAE
| | - Ali El-Keblawy
- Department of Applied Biology, College of Sciences, University of Sharjah, Sharjah, UAE
- Department of Biology, Faculty of Science, Al-Arish University, Egypt
| | - Teresa Navarro
- Departmento de Botanica y Fisiologia Vegetal, Universidad de Málaga, Málaga, Spain
| | - Sameh S M Soliman
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah, UAE
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23
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Yuan W, Zhang Q, Li Y, Wang Q, Xu F, Dang X, Xu W, Zhang J, Miao R. Abscisic acid is required for root elongation associated with Ca 2+ influx in response to water stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 169:127-137. [PMID: 34781213 DOI: 10.1016/j.plaphy.2021.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/15/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Abscisic acid (ABA) is a critical hormone for plant survival upon water stress. In this study, a large-scale mutants of Arabidopsis ecotype Columbia-0 (Col-0) by ethyl methanesulfonate (EMS)-mutagenesis were generated, and an improved root elongation under water-stress 1 (irew1) mutant showing significantly enhanced root growth was isolated upon a water potential gradient assay. Then, irew1 and ABA-related mutants in Arabidopsis or tomato plants were observed under water potential gradient assay or water-deficient condition. ABA pathway, Ca2+ response and primary root (PR) elongation rate were monitored in addition to DNA- and RNA-Seq analyses. We found that based on phenotyping and transcriptional analyses, irew1 exhibited the enhanced PR growth, ABA and Ca2+ responses compared to wild-type subjected to water stress. Interestingly, exogenous Ca2+ application enhanced PR growth of irew1, ABA-biosynthesis deficient mutants in Arabidopsis and tomato plants in response to water potential gradients or water-deficient condition. In combination with other ABA-related mutants and pharmacological study, our results suggest that ABA is required for root elongation associated with Ca2+ influx in response to water stress.
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Affiliation(s)
- Wei Yuan
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Qian Zhang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Ying Li
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Qianwen Wang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Feiyun Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Xiaolin Dang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China
| | - Weifeng Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China.
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, Hong Kong and Stake Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong
| | - Rui Miao
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Jinshan, Fuzhou, 350002, China.
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24
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Li Z, Jiao Y, Zhang C, Dou M, Weng K, Wang Y, Xu Y. VvHDZ28 positively regulate salicylic acid biosynthesis during seed abortion in Thompson Seedless. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1824-1838. [PMID: 33835678 PMCID: PMC8428834 DOI: 10.1111/pbi.13596] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 03/28/2021] [Indexed: 06/10/2023]
Abstract
Seedlessness in grapes is one of the features most appreciated by consumers. However, the mechanisms underlying seedlessness in grapes remain obscure. Here, we observe small globular embryos and globular embryos in Pinot Noir and Thompson Seedless from 20 to 30 days after flowering (DAF). From 40 to 50 DAF, we observe torpedo embryos and cotyledon embryos in Pinot Noir but aborted embryos and endosperm in Thompson Seedless. Thus, RNA-Seq analyses of seeds at these stages from Thompson Seedless and Pinot Noir were performed. A total of 6442 differentially expressed genes were identified. Among these, genes involved in SA biosynthesis, VvEDS1 and VvSARD1, were more highly expressed in Thompson Seedless than in Pinot Noir. Moreover, the content of endogenous SA is at least five times higher in Thompson Seedless than in Pinot Noir. Increased trimethylation of H3K27 of VvEDS1 and VvSARD1 may be correlated with lower SA content in Pinot Noir. We also demonstrate that VvHDZ28 positively regulates the expression of VvEDS1. Moreover, over-expression of VvHDZ28 results in seedless fruit and increased SA contents in Solanum lycopersicum. Our results reveal the potential role of SA and feedback regulation of VvHDZ28 in seedless grapes.
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Affiliation(s)
- Zhiqian Li
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Yuntong Jiao
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Chen Zhang
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Mengru Dou
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Kai Weng
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- College of life scienceNorthwest A&F UniversityYanglingChina
| | - Yuejin Wang
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
| | - Yan Xu
- College of HorticultureNorthwest A&F UniversityYanglingChina
- State Key Laboratory of Crop Stress Biology in Arid AreasNorthwest A&F UniversityYanglingChina
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest ChinaMinistry of AgricultureYanglingChina
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25
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Basso MF, Costa JA, Ribeiro TP, Arraes FBM, Lourenço-Tessutti IT, Macedo AF, Neves MRD, Nardeli SM, Arge LW, Perez CEA, Silva PLR, de Macedo LLP, Lisei-de-Sa ME, Santos Amorim RM, Pinto ERDC, Silva MCM, Morgante CV, Floh EIS, Alves-Ferreira M, Grossi-de-Sa MF. Overexpression of the CaHB12 transcription factor in cotton (Gossypium hirsutum) improves drought tolerance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 165:80-93. [PMID: 34034163 DOI: 10.1016/j.plaphy.2021.05.009] [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: 02/13/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
The Coffea arabica HB12 gene (CaHB12), which encodes a transcription factor belonging to the HD-Zip I subfamily, is upregulated under drought, and its constitutive overexpression (35S:CaHB12OX) improves the Arabidopsis thaliana tolerance to drought and salinity stresses. Herein, we generated transgenic cotton events constitutively overexpressing the CaHB12 gene, characterized these events based on their increased tolerance to water deficit, and exploited the gene expression level from the CaHB12 network. The segregating events Ev8.29.1, Ev8.90.1, and Ev23.36.1 showed higher photosynthetic yield and higher water use efficiency under severe water deficit and permanent wilting point conditions compared to wild-type plants. Under well-irrigated conditions, these three promising transformed events showed an equivalent level of Abscisic acid (ABA) and decreased Indole-3-acetic acid (IAA) accumulation, and a higher putrescine/(spermidine + spermine) ratio in leaf tissues was found in the progenies of at least two transgenic cotton events compared to non-transgenic plants. In addition, genes that are considered as modulated in the A. thaliana 35S:CaHB12OX line were also shown to be modulated in several transgenic cotton events maintained under field capacity conditions. The upregulation of GhPP2C and GhSnRK2 in transgenic cotton events maintained under permanent wilting point conditions suggested that CaHB12 might act enhancing the ABA-dependent pathway. All these data confirmed that CaHB12 overexpression improved the tolerance to water deficit, and the transcriptional modulation of genes related to the ABA signaling pathway or downstream genes might enhance the defense responses to drought. The observed decrease in IAA levels indicates that CaHB12 overexpression can prevent leaf abscission in plants under or after stress. Thus, our findings provide new insights on CaHB12 gene and identify several promising cotton events for conducting field trials on water deficit tolerance and agronomic performance.
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Affiliation(s)
- Marcos Fernando Basso
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil
| | - Julia Almeida Costa
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; Catholic University of Brasília, Brasília, DF, 71966-700, Brazil
| | - Thuanne Pires Ribeiro
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; Federal University of Brasília, Brasília, DF, 70910-900, Brazil
| | - Fabricio Barbosa Monteiro Arraes
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; Federal University of Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil
| | | | | | | | | | - Luis Willian Arge
- Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-901, Brazil
| | | | - Paolo Lucas Rodrigues Silva
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; Catholic University of Brasília, Brasília, DF, 71966-700, Brazil
| | | | - Maria Eugênia Lisei-de-Sa
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil; EPAMIG, Uberaba, MG, 31170-495, Brazil
| | | | | | - Maria Cristina Mattar Silva
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil
| | - Carolina Vianna Morgante
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil; Embrapa Semi-Arid, Petrolina, PE, 56302-970, Brazil
| | | | - Marcio Alves-Ferreira
- National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil; Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-901, Brazil
| | - Maria Fatima Grossi-de-Sa
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, 70297-400, Brazil; National Institute of Science and Technology, INCT PlantStress Biotech, EMBRAPA, Brasília, DF, 70297-400, Brazil; Catholic University of Brasília, Brasília, DF, 71966-700, Brazil.
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26
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Ding W, Wang Y, Qi C, Luo Y, Wang C, Xu W, Qu S. Fine mapping identified the gibberellin 2-oxidase gene CpDw leading to a dwarf phenotype in squash (Cucurbita pepo L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 306:110857. [PMID: 33775356 DOI: 10.1016/j.plantsci.2021.110857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 02/10/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
Dwarfism is an important agronomic trait in pumpkin that can increase yield. In this study, the dwarf Cucurbita pepo L. line X10 exhibited significantly longitudinally shorter cell length in the stem than did the normal-vine line JIN234. The dwarf stature of X10 was recovered with exogenous gibberellin (GA3) application, suggesting that X10 might be sensitive to GA biosynthesis. Genetic analysis revealed that this dwarf trait is controlled by a single completely dominant locus: CpDw (Cucurbita pepo L. Dwarf). Using 1,300 F2 individuals derived from a cross between X10 and JIN234, we mapped the CpDw locus to a region of approximately 24.6 kb on chromosome 10 that contain 5 annotated genes. The high expression level of Cp4.1LG10g05910.1 and high GA2ox enzyme activity in X10 revealed that the GA 2-oxidase gene Cp4.1LG10g05910.1 is a candidate gene for CpDw. Alignment of the Cp4.1LG10g05910.1 gene revealed two nonsynonymous single nucleotide polymorphism (SNP) mutations in the two exons, as well as several SNPs and InDels in the important functional elements of promoter between parental lines. Further allelic diversity analysis of the Cucurbita spp. germplasm resources indicated that Cp4.1LG10g05910.1 may be involved in vine growth during the early developmental stage in C. pepo but not in C. maxima or C. moschata. This study provides an important theoretical basis for the genetic regulation of vine length and crop breeding in pumpkin.
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Affiliation(s)
- Wenqi Ding
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Yunli Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Cong Qi
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Yusong Luo
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Chaojie Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Wenlong Xu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China
| | - Shuping Qu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs/Northeast Agricultural University, Harbin, 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China.
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27
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Bashyal BM, Parmar P, Zaidi NW, Aggarwal R. Molecular Programming of Drought-Challenged Trichoderma harzianum-Bioprimed Rice ( Oryza sativa L.). Front Microbiol 2021; 12:655165. [PMID: 33927706 PMCID: PMC8076752 DOI: 10.3389/fmicb.2021.655165] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/24/2021] [Indexed: 12/18/2022] Open
Abstract
Trichoderma biopriming enhances rice growth in drought-stressed soils by triggering various plant metabolic pathways related to antioxidative defense, secondary metabolites, and hormonal upregulation. In the present study, transcriptomic analysis of rice cultivar IR64 bioprimed with Trichoderma harzianum under drought stress was carried out in comparison with drought-stressed samples using next-generation sequencing techniques. Out of the 2,506 significant (p < 0.05) differentially expressed genes (DEGs), 337 (15%) were exclusively expressed in drought-stressed plants, 382 (15%) were expressed in T. harzianum-treated drought-stressed plants, and 1,787 (70%) were commonly expressed. Furthermore, comparative analysis of upregulated and downregulated genes under stressed conditions showed that 1,053 genes (42%) were upregulated and 733 genes (29%) were downregulated in T. harzianum-treated drought-stressed rice plants. The genes exclusively expressed in T. harzianum-treated drought-stressed plants were mostly photosynthetic and antioxidative such as plastocyanin, small chain of Rubisco, PSI subunit Q, PSII subunit PSBY, osmoproteins, proline-rich protein, aquaporins, stress-enhanced proteins, and chaperonins. The Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis states that the most enriched pathways were metabolic (38%) followed by pathways involved in the synthesis of secondary metabolites (25%), carbon metabolism (6%), phenyl propanoid (7%), and glutathione metabolism (3%). Some of the genes were selected for validation using real-time PCR which showed consistent expression as RNA-Seq data. Furthermore, to establish host-T. harzianum interaction, transcriptome analysis of Trichoderma was also carried out. The Gene Ontology (GO) analysis of T. harzianum transcriptome suggested that the annotated genes are functionally related to carbohydrate binding module, glycoside hydrolase, GMC oxidoreductase, and trehalase and were mainly upregulated, playing an important role in establishing the mycelia colonization of rice roots and its growth. Overall, it can be concluded that T. harzianum biopriming delays drought stress in rice cultivars by a multitude of molecular programming.
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Affiliation(s)
- Bishnu Maya Bashyal
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, India
| | - Pooja Parmar
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, India
| | | | - Rashmi Aggarwal
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa, New Delhi, India
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González-Morales S, Solís-Gaona S, Valdés-Caballero MV, Juárez-Maldonado A, Loredo-Treviño A, Benavides-Mendoza A. Transcriptomics of Biostimulation of Plants Under Abiotic Stress. Front Genet 2021; 12:583888. [PMID: 33613631 PMCID: PMC7888440 DOI: 10.3389/fgene.2021.583888] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 01/06/2021] [Indexed: 12/20/2022] Open
Abstract
Plant biostimulants are compounds, living microorganisms, or their constituent parts that alter plant development programs. The impact of biostimulants is manifested in several ways: via morphological, physiological, biochemical, epigenomic, proteomic, and transcriptomic changes. For each of these, a response and alteration occur, and these alterations in turn improve metabolic and adaptive performance in the environment. Many studies have been conducted on the effects of different biotic and abiotic stimulants on plants, including many crop species. However, as far as we know, there are no reviews available that describe the impact of biostimulants for a specific field such as transcriptomics, which is the objective of this review. For the commercial registration process of products for agricultural use, it is necessary to distinguish the specific impact of biostimulants from that of other legal categories of products used in agriculture, such as fertilizers and plant hormones. For the chemical or biological classification of biostimulants, the classification is seen as a complex issue, given the great diversity of compounds and organisms that cause biostimulation. However, with an approach focused on the impact on a particular field such as transcriptomics, it is perhaps possible to obtain a criterion that allows biostimulants to be grouped considering their effects on living systems, as well as the overlap of the impact on metabolism, physiology, and morphology occurring between fertilizers, hormones, and biostimulants.
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Zhang RX, Zhu WC, Cheng GX, Yu YN, Li QH, Haq SU, Said F, Gong ZH. A novel gene, CaATHB-12, negatively regulates fruit carotenoid content under cold stress in Capsicum annuum. Food Nutr Res 2020; 64:3729. [PMID: 33447178 PMCID: PMC7778427 DOI: 10.29219/fnr.v64.3729] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 05/20/2020] [Accepted: 09/10/2020] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Carotenoids, the secondary metabolites terpenoids, are the largest factors that form the fruit color. Similar to flavonoids, they are not only safe and natural colorants of fruits but also play a role as stress response biomolecules. METHODS To study the contribution of the key genes in carotenoids biosynthesis, fruit-color formation, and in response to cold stress, we characterized the key regulatory factor CaATHB-12 from the HD-ZIP I sub-gene family members in pepper. RESULTS Cold stress enhanced carotenoid accumulation as compared with the normal condition. CaATHB-12 silencing through virus-induced gene silencing changed the fruit color by regulating the carotenoid contents. CaATHB-12 silencing increased the antioxidant enzyme activities in the fruits of pepper, exposed to cold stress, whereas CaATHB-12 overexpression decreased the activities of antioxidant enzymes in the transgenic Arabidopsis lines, exposed to cold stress, suggesting that CaATHB-12 is involved in the regulation of cold stress in the pepper fruits. CONCLUSION Our research will provide insights into the formation of fruit color in pepper and contribution of CaATHB-12 in response to cold stress. Further study should be focused on the interaction between CaATHB-12 and its target gene.
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Affiliation(s)
- Rui-Xing Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Wen-Chao Zhu
- Guizhou Institute of Pepper, Guiyang, P.R. China
| | - Guo-Xin Cheng
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Ya-Nan Yu
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Quan-Hui Li
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Saeed ul Haq
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
| | - Fazal Said
- Department of Agriculture, Abdul Wali Khan University, Mardan, Paksitan
| | - Zhen-Hui Gong
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, P.R. China
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Wei M, Liu Q, Wang Z, Yang J, Li W, Chen Y, Lu H, Nie J, Liu B, Lv K, Mao X, Chen S, Sanders J, Wei H, Li C. PuHox52-mediated hierarchical multilayered gene regulatory network promotes adventitious root formation in Populus ussuriensis. THE NEW PHYTOLOGIST 2020; 228:1369-1385. [PMID: 32589766 DOI: 10.1111/nph.16778] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/15/2020] [Indexed: 05/25/2023]
Abstract
Adventitious root (AR) formation is critically important in vegetative propagation through cuttings in some plants, especially woody species. However, the underlying molecular mechanisms remain elusive. Here, we report the identification of a poplar homeobox gene, PuHox52, which was induced rapidly (within 15 min) at the basal ends of stems upon cutting and played a key regulatory role in adventitious rooting. We demonstrated that overexpression of PuHox52 significantly increased the number of ARs while suppression of PuHox52 had the opposite effect. A multilayered hierarchical gene regulatory network (ML-hGRN) mediated by PuHox52 was reverse-engineered and demonstrated to govern AR formation. PuHox52 regulated AR formation through upregulation of nine hub regulators, including a jasmonate signaling pathway gene, PuMYC2, and an auxin signaling pathway gene, PuAGL12. We also identified coherent type 4 feed-forward loops within this ML-hGRN; PuHox52 repressed PuHDA9, which encodes a histone deacetylase, and led to an increase in acetylation and presumably expression of three hub regulators, PuWRKY51, PuLBD21 and PuIAA7. Our results indicate that the ML-hGRN mediated by PuHox52 governs AR formation at the basal ends of stem cuttings from poplar trees.
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Affiliation(s)
- Ming Wei
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Quangang Liu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
- College of Forestry, Shenyang Agricultural University, Shenyang, 110866, China
| | - Zhanchao Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Jingli Yang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Wenlong Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Yingxi Chen
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Han Lu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Jinfu Nie
- Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230000, China
- Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510000, China
| | - Baoguang Liu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Kaiwen Lv
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Xuliang Mao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Su Chen
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
| | - Jennifer Sanders
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, 49931, USA
| | - Hairong Wei
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, 49931, USA
| | - Chenghao Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China
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Miguel VN, Ribichich KF, Giacomelli JI, Chan RL. Key role of the motor protein Kinesin 13B in the activity of homeodomain-leucine zipper I transcription factors. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:6282-6296. [PMID: 32882705 DOI: 10.1093/jxb/eraa379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 08/13/2020] [Indexed: 06/11/2023]
Abstract
The sunflower (Helianthus annuus) homeodomain-leucine zipper I transcription factor HaHB11 conferred differential phenotypic features when it was expressed in Arabidopsis, alfalfa, and maize plants. Such differences were increased biomass, seed yield, and tolerance to flooding. To elucidate the molecular mechanisms leading to such traits and identify HaHB11-interacting proteins, a yeast two-hybrid screening of an Arabidopsis cDNA library was carried out using HaHB11 as bait. The sole protein identified with high confidence as interacting with HaHB11 was Kinesin 13B. The interaction was confirmed by bimolecular fluorescence complementation and by yeast two-hybrid assay. Kinesin 13B also interacted with AtHB7, the Arabidopsis closest ortholog of HaHB11. Histochemical analyses revealed an overlap between the expression patterns of the three genes in hypocotyls, apical meristems, young leaves, vascular tissue, axillary buds, cauline leaves, and cauline leaf nodes at different developmental stages. AtKinesin 13B mutants did not exhibit a differential phenotype when compared with controls; however, both HaHB11 and AtHB7 overexpressor plants lost, partially or totally, their differential phenotypic characteristics when crossed with such mutants. Altogether, the results indicated that Kinesin 13B is essential for the homeodomain-leucine zipper transcription factors I to exert their functions, probably via regulation of the intracellular distribution of these transcription factors by the motor protein.
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Affiliation(s)
- Virginia Natali Miguel
- Instituto de Agrobiotecnología del Litoral, CONICET, Universidad Nacional del Litoral, FBCB, Colectora Ruta Nacional 168 km 0, 3000, Santa Fe, Argentina
| | - Karina Fabiana Ribichich
- Instituto de Agrobiotecnología del Litoral, CONICET, Universidad Nacional del Litoral, FBCB, Colectora Ruta Nacional 168 km 0, 3000, Santa Fe, Argentina
| | - Jorge Ignacio Giacomelli
- Instituto de Agrobiotecnología del Litoral, CONICET, Universidad Nacional del Litoral, FBCB, Colectora Ruta Nacional 168 km 0, 3000, Santa Fe, Argentina
| | - Raquel Lia Chan
- Instituto de Agrobiotecnología del Litoral, CONICET, Universidad Nacional del Litoral, FBCB, Colectora Ruta Nacional 168 km 0, 3000, Santa Fe, Argentina
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Romani F, Banić E, Florent SN, Kanazawa T, Goodger JQ, Mentink RA, Dierschke T, Zachgo S, Ueda T, Bowman JL, Tsiantis M, Moreno JE. Oil Body Formation in Marchantia polymorpha Is Controlled by MpC1HDZ and Serves as a Defense against Arthropod Herbivores. Curr Biol 2020; 30:2815-2828.e8. [DOI: 10.1016/j.cub.2020.05.081] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/03/2020] [Accepted: 05/27/2020] [Indexed: 12/26/2022]
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Liu Y, Xu J, Guo S, Yuan X, Zhao S, Tian H, Dai S, Kong X, Ding Z. AtHB7/12 Regulate Root Growth in Response to Aluminum Stress. Int J Mol Sci 2020; 21:ijms21114080. [PMID: 32517364 PMCID: PMC7312248 DOI: 10.3390/ijms21114080] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 01/19/2023] Open
Abstract
Aluminum (Al) stress is a major limiting factor for plant growth and crop production in acid soils. At present, only a few transcription factors involved in the regulation of Al resistance have been characterized. Here, we used reversed genetic approach through phenotype analysis of overexpressors and mutants to demonstrate that AtHB7 and AtHB12, two HD-Zip I transcription factors, participate in Al resistance. In response to Al stress, AtHB7 and AtHB12 displayed different dynamic expression patterns. Although both AtHB7 and AtHB12 positively regulate root growth in the absence of Al stress, our results showed that AtHB7 antagonizes with AtHB12 to control root growth in response to Al stress. The athb7/12 double mutant displayed a wild-type phenotype under Al stress. Consistently, our physiological analysis showed that AtHB7 and AtHB12 oppositely regulate the capacity of cell wall to bind Al. Yeast two hybrid assays showed that AtHB7 and AtHB12 could form homo-dimers and hetero-dimers in vitro, suggesting the interaction between AtHB7 and AtHB12 in the regulation of root growth. The conclusion was that AtHB7 and AtHB12 oppositely regulate Al resistance by affecting Al accumulation in root cell wall.
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Affiliation(s)
- Yang Liu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao 266237, China; (Y.L.); (J.X.); (H.T.)
| | - Jiameng Xu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao 266237, China; (Y.L.); (J.X.); (H.T.)
| | - Siyi Guo
- The Key Laboratory of Plant Stress Biology, School of Life Science, Henan University, JinMing Avenue, Henan University, Kaifeng 475004, China;
| | - Xianzheng Yuan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China; (X.Y.); (S.Z.)
| | - Shan Zhao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China; (X.Y.); (S.Z.)
| | - Huiyu Tian
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao 266237, China; (Y.L.); (J.X.); (H.T.)
| | - Shaojun Dai
- Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China;
| | - Xiangpei Kong
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao 266237, China; (Y.L.); (J.X.); (H.T.)
- Correspondence: (X.K.); (Z.D.); Tel.: +86-532-5863-0889 (Z.D.)
| | - Zhaojun Ding
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao 266237, China; (Y.L.); (J.X.); (H.T.)
- Correspondence: (X.K.); (Z.D.); Tel.: +86-532-5863-0889 (Z.D.)
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Fan Y, Liu J, Zou J, Zhang X, Jiang L, Liu K, Lü P, Gao J, Zhang C. The RhHB1/ RhLOX4 module affects the dehydration tolerance of rose flowers ( Rosa hybrida) by fine-tuning jasmonic acid levels. HORTICULTURE RESEARCH 2020; 7:74. [PMID: 32377364 PMCID: PMC7195446 DOI: 10.1038/s41438-020-0299-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 05/14/2023]
Abstract
Phytohormones are key factors in plant responsiveness to abiotic and biotic stresses, and maintaining hormone homeostasis is critically important during stress responses. Cut rose (Rosa hybrida) flowers experience dehydration stress during postharvest handling, and jasmonic acid (JA) levels change as a result of this stress. However, how JA is involved in dehydration tolerance remains unclear. We investigated the functions of the JA- and dehydration-induced RhHB1 gene, which encodes a homeodomain-leucine zipper I γ-clade transcription factor, in rose flowers. Silencing RhHB1 decreased petal dehydration tolerance and resulted in a persistent increase in JA-Ile content and reduced dehydration tolerance. An elevated JA-Ile level had a detrimental effect on rose petal dehydration tolerance. RhHB1 was shown to lower the transient induction of JA-Ile accumulation in response to dehydration. In addition to transcriptomic data, we obtained evidence that RhHB1 suppresses the expression of the lipoxygenase 4 (RhLOX4) gene by directly binding to its promoter both in vivo and in vitro. We propose that increased JA-Ile levels weaken the capacity for osmotic adjustment in petal cells, resulting in reduced dehydration tolerance. In conclusion, a JA feedback loop mediated by an RhHB1/RhLOX4 regulatory module provides dehydration tolerance by fine-tuning bioactive JA levels in dehydrated flowers.
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Affiliation(s)
- Youwei Fan
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Jitao Liu
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
- Crop Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of Crop Genetic Improvement, Guangzhou, Guangdong 510642 China
| | - Jing Zou
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Xiangyu Zhang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Liwei Jiang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Kun Liu
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Peitao Lü
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Junping Gao
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
| | - Changqing Zhang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193 China
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González FG, Rigalli N, Miranda PV, Romagnoli M, Ribichich KF, Trucco F, Portapila M, Otegui ME, Chan RL. An Interdisciplinary Approach to Study the Performance of Second-generation Genetically Modified Crops in Field Trials: A Case Study With Soybean and Wheat Carrying the Sunflower HaHB4 Transcription Factor. FRONTIERS IN PLANT SCIENCE 2020; 11:178. [PMID: 32210989 PMCID: PMC7069416 DOI: 10.3389/fpls.2020.00178] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/05/2020] [Indexed: 05/22/2023]
Abstract
Research, production, and use of genetically modified (GM) crops have split the world between supporters and opponents. Up to now, this technology has been limited to the control of weeds and pests, whereas the second generation of GM crops is expected to assist farmers in abiotic stress tolerance or improved nutritional features. Aiming to analyze this subject holistically, in this presentation we address an advanced technology for drought-tolerant GM crops, upscaling from molecular details obtained in the laboratory to an extensive network of field trials as well as the impact of the introduction of this innovation into the market. Sunflower has divergent transcription factors, which could be key actors in the drought response orchestrating several signal transduction pathways, generating an improved performance to deal with water deficit. One of such factors, HaHB4, belongs to the homeodomain-leucine zipper family and was first introduced in Arabidopsis. Transformed plants had improved tolerance to water deficits, through the inhibition of ethylene sensitivity and not by stomata closure. Wheat and soybean plants expressing the HaHB4 gene were obtained and cropped across a wide range of growing conditions exhibiting enhanced adaptation to drought-prone environments, the most important constraint affecting crop yield worldwide. The performance of wheat and soybean, however, differed slightly across mentioned environments; whereas the improved behavior of GM wheat respect to controls was less dependent on the temperature regime (cool or warm), differences between GM and wild-type soybeans were remarkably larger in warmer compared to cooler conditions. In both species, these GM crops are good candidates to become market products in the near future. In anticipation of consumers' and other stakeholders' interest, spectral analyses of field crops have been conducted to differentiate these GM crops from wild type and commercial cultivars. In this paper, the potential impact of the release of such market products is discussed, considering the perspectives of different stakeholders.
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Affiliation(s)
| | - Nicolás Rigalli
- CIFASIS, Universidad Nacional de Rosario—CONICET, Rosario, Argentina
| | - Patricia Vivian Miranda
- Instituto de Agrobiotecnología Rosario (INDEAR)/BIOCERES, Rosario, Argentina
- CONICET, Buenos Aires, Argentina
| | - Martín Romagnoli
- CIFASIS, Universidad Nacional de Rosario—CONICET, Rosario, Argentina
| | - Karina Fabiana Ribichich
- Instituto de Agrobiotecnología del Litoral, Universidad Nacional del Litoral—CONICET, Facultad de Bioquímica y Ciencias Biológicas, Santa Fe, Argentina
| | - Federico Trucco
- Instituto de Agrobiotecnología Rosario (INDEAR)/BIOCERES, Rosario, Argentina
| | | | - María Elena Otegui
- CONICET-INTA-FAUBA, Estación Experimental Pergamino, Facultad de Agronomía Universidad de Buenos Aires, Pergamino, Argentina
| | - Raquel Lía Chan
- Instituto de Agrobiotecnología del Litoral, Universidad Nacional del Litoral—CONICET, Facultad de Bioquímica y Ciencias Biológicas, Santa Fe, Argentina
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Sebastián D, Fernando FD, Raúl DG, Gabriela GM. Overexpression of Arabidopsis aspartic protease APA1 gene confers drought tolerance. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 292:110406. [PMID: 32005402 DOI: 10.1016/j.plantsci.2020.110406] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 12/26/2019] [Accepted: 12/31/2019] [Indexed: 05/12/2023]
Abstract
Drought is an environmental stress that severely affects plant growth and crop production. Different studies have focused on drought responses but the molecular bases that regulate these mechanisms are still unclear. We report the participation of Aspartic Protease (APA1) in drought tolerance. Overexpressing APA1 Arabidopsis plants (OE-APA1), showed a phenotype more tolerant to drought compared with WT. On the contrary, apa1 insertional lines were more sensitive to this stress compared to WT plants. Morphological and physiological differences related with the water loss were observed between leaves of OE- APA1 and WT plants. OE-APA1 leaves showed lower stomata index and stomata density as well as a smaller of the stomatic aperture compared to WT plants. qPCR analysis in OE-APA1 leaves, showed higher expression levels of genes related to ABA signaling and synthesis. Analysis of plant lines expressing APA1 promoter fused to GUS showed that APA1 is expressed in epidermal and stomata cells. In summary, this work suggests that APA1 is involved in ABA-dependent response that its overexpression confers drought tolerance in Arabidopsis.
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Affiliation(s)
- D'Ippólito Sebastián
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina
| | - Fiol Diego Fernando
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina
| | - Daleo Gustavo Raúl
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina
| | - Guevara María Gabriela
- Biological Research Institute, National Council of Scientific and Technique Research (CONICET), University of Mar del Plata, Mar del Plata (UNMDP), Argentina.
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Comprehensive Genomic Analysis and Expression Profiling of the C2H2 Zinc Finger Protein Family Under Abiotic Stresses in Cucumber ( Cucumis sativus L.). Genes (Basel) 2020; 11:genes11020171. [PMID: 32041281 PMCID: PMC7074296 DOI: 10.3390/genes11020171] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/01/2020] [Accepted: 02/04/2020] [Indexed: 11/17/2022] Open
Abstract
Cucumber is one of the most important vegetables in the world. The C2H2 zinc finger protein (C2H2-ZFP) family plays an important role in the growth development and abiotic stress responses of plants. However, there have been no systematic studies on cucumber. In this study, we performed a genome-wide study of C2H2-ZFP genes and analyzed their chromosomal location, gene structure, conservation motif, and transcriptional expression. In total, 101 putative cucumber C2H2-ZFP genes were identified and divided into six groups (I–VI). RNA-seq transcriptome data on different organs revealed temporal and spatial expression specificity of the C2H2-ZFP genes. Expression analysis of sixteen selected C2H2-ZFP genes in response to cold, drought, salt, and abscisic acid (ABA) treatments by real-time quantitative polymerase chain reaction showed that C2H2-ZFP genes may be involved in different signaling pathways. These results provide valuable information for studying the function of cucumber C2H2-ZFP genes in the future.
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Hu Z, Fu Q, Zheng J, Zhang A, Wang H. Transcriptomic and metabolomic analyses reveal that melatonin promotes melon root development under copper stress by inhibiting jasmonic acid biosynthesis. HORTICULTURE RESEARCH 2020; 7:79. [PMID: 32528691 PMCID: PMC7261800 DOI: 10.1038/s41438-020-0293-5] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/03/2020] [Accepted: 03/20/2020] [Indexed: 05/17/2023]
Abstract
Melatonin has been shown to alleviate the effects of abiotic stress and to regulate plant development. Copper, a common heavy metal and soil pollutant, can suppress plant growth and development. In this work, we explored the protective effects of exogenous melatonin on lateral root formation in response to copper stress using melon seeds subjected to three germination treatments: CK1 (control), CK2 (300 μmol/L CuSO4), and MT3 (300 μmol/L melatonin + 300 μmol/L CuSO4). Melatonin pretreatment increased the antioxidant enzyme activities and root vigor, and decreased the proline and malondialdehyde (MDA) contents in the roots of copper-stressed melon seedlings. We then used transcriptomic and metabolomic analyses to explore the mechanisms by which exogenous melatonin protects against copper stress. There were 70 significant differentially expressed genes (DEGs) (28 upregulated, 42 downregulated) and 318 significantly differentially expressed metabolites (DEMs) (168 upregulated, 150 downregulated) between the MT3 and CK2 treatments. Melatonin pretreatment altered the expression of genes related to redox and cell wall formation processes. In addition, we found that members of the AP2/ERF, BBR/BPC, GRAS, and HD-ZIP transcription factor families may have vital roles in lateral root development. Melatonin also increased the level of Glutathione (GSH), which chelates excess Cu2+. The combined transcriptomic and metabolomic analysis revealed DEGs and DEMs involved in jasmonic acid (JA) biosynthesis, including four lipoxygenase-related genes and two metabolites (linoleic acid and lecithin) related to melatonin's alleviation effect on copper toxicity. This research elucidated the molecular mechanisms of melatonin's protective effects in copper-stressed melon.
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Affiliation(s)
- Zhicheng Hu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Qiushi Fu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Jing Zheng
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Aiai Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
| | - Huaisong Wang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100081 Beijing, China
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Yuan W, Zhang Q, Li Y, Wang Q, Xu F, Dang X, Xu W, Zhang J, Miao R. Abscisic Acid Is Required for Root Elongation Associated With Ca 2+ Influx in Response to Water Stress. FRONTIERS IN PLANT SCIENCE 2020; 11:332. [PMID: 33193463 PMCID: PMC7188952 DOI: 10.3389/fpls.2020.00332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 03/05/2020] [Indexed: 05/12/2023]
Abstract
Abscisic acid (ABA) is a critical hormone for plant survival under water stress. In this study, large-scale mutants of the Arabidopsis ecotype Columbia-0 (Col-0) were generated by ethyl methanesulfonate (EMS)-mutagenesis, and an improved root elongation under water-stress 1 (irew1) mutant showing significantly enhanced root growth was isolated under a water potential gradient assay. Then, irew1 and ABA-related mutants in Arabidopsis or tomato plants were observed under water potential gradient assay or water-deficient conditions. ABA pathway, Ca2+ response, and primary root (PR) elongation rate were monitored in addition to DNA- and RNA-Seq analyses. We found that based on phenotyping and transcriptional analyses, irew1 exhibited enhanced PR growth, ABA, and Ca2+ responses, compared to wild type subjected to water stress. Interestingly, exogenous Ca2+ application enhanced PR growth of irew1, ABA-biosynthesis deficient mutants in Arabidopsis, and tomato plants, in response to water potential gradients or water-deficient conditions. In combination with other ABA-related mutants and pharmacological studies, our results suggest that ABA is required for root elongation associated with Ca2+ influx in response to water stress.
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Affiliation(s)
- Wei Yuan
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qian Zhang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ying Li
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qianwen Wang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Feiyun Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaolin Dang
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weifeng Xu
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
- Weifeng Xu,
| | - Jianhua Zhang
- Department of Biology, Hong Kong Baptist University, Hong Kong and Stake Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Rui Miao
- Center for Plant Water-Use and Nutrition Regulation and College of Resources and Environment, Joint International Research Laboratory of Water and Nutrient in Crops and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
- *Correspondence: Rui Miao, ;
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Gong S, Ding Y, Hu S, Ding L, Chen Z, Zhu C. The role of HD-Zip class I transcription factors in plant response to abiotic stresses. PHYSIOLOGIA PLANTARUM 2019; 167:516-525. [PMID: 30851063 DOI: 10.1111/ppl.12965] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 03/02/2019] [Accepted: 03/07/2019] [Indexed: 05/27/2023]
Abstract
Abiotic stresses usually affect plant growth and development, indirectly or directly causing crop production reduction and even plant death. To survive, plants utilize different mechanisms to adapt themselves to continuously changing surrounding environmental stresses. Homeodomain-leucine zipper (HD-Zip) transcription factors are unique to the plant kingdom and divided into four different subfamilies (HD-Zip I∼IV). Many HD-Zip I members have been shown to play critical roles in the regulation of plant developmental processes, signaling networks and responses to environmental stresses. This review focuses on the role of HD-Zip I transcription factors in plant responses to various abiotic stresses, including abscisic acid-mediated stress, drought and cold stress, oxidative stress, helping to identify the potential regulatory mechanisms that alleviate abiotic stress in plants.
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Affiliation(s)
- Shaohua Gong
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Yanfei Ding
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Shanshan Hu
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Lihong Ding
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
| | - Zhixiang Chen
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, 47907, USA
| | - Cheng Zhu
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, 310018, China
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Li C, Zhao M, Ma X, Wen Z, Ying P, Peng M, Ning X, Xia R, Wu H, Li J. The HD-Zip transcription factor LcHB2 regulates litchi fruit abscission through the activation of two cellulase genes. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:5189-5203. [PMID: 31173099 PMCID: PMC6793447 DOI: 10.1093/jxb/erz276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 05/30/2019] [Indexed: 05/05/2023]
Abstract
Cellulases play important roles in the shedding of plant organs; however, little is yet known about the functions of cellulase genes during the process of organ abscission. Abnormal fruitlet abscission is a serious problem in the production of litchi (Litchi chinensis), an economically important fruit widely grown in South Asia. In this study, two abscission-accelerating treatments (carbohydrate stress and application of ethephon) were evaluated in litchi fruitlets. Cell wall degradation and cell separation were clearly observed in the abscission zones of treated fruitlets, consistent with enhanced cellulase activities and reduced cellulose contents. The expression of two cellulase genes (LcCEL2 and LcCEL8) was strongly associated with abscission. Floral organs of transgenic Arabidopsis overexpressing LcCEL2 or LcCEL8 showed remarkably precocious abscission. Electrophoretic mobility shift assays and transient expression experiments demonstrated that a novel homeodomain-leucine zipper transcription factor, LcHB2, could directly bind to and activate HD-binding cis-elements in the LcCEL2 and LcCEL8 promoters. Our results provide new information regarding the transcriptional regulation of the cellulase genes responsible for cell wall degradation and cell separation during plant organ shedding, and raise the possibility of future manipulation of litchi fruitlet abscission by modulation of the activities of these two cellulases.
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Affiliation(s)
- Caiqin Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Zhenxi Wen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Peiyuan Ying
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Manjun Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Xiping Ning
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Rui Xia
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Hong Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Correspondence: or
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
- Correspondence: or
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Li C, Ma X, Huang X, Wang H, Wu H, Zhao M, Li J. Involvement of HD-ZIP I transcription factors LcHB2 and LcHB3 in fruitlet abscission by promoting transcription of genes related to the biosynthesis of ethylene and ABA in litchi. TREE PHYSIOLOGY 2019; 39:1600-1613. [PMID: 31222320 DOI: 10.1093/treephys/tpz071] [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: 02/18/2019] [Revised: 05/07/2019] [Accepted: 06/11/2019] [Indexed: 05/28/2023]
Abstract
Abnormal fruitlet abscission is a limiting factor in the production of litchi, an economically important fruit in Southern Asia. Both ethylene and abscisic acid (ABA) induce organ abscission in plants. Although ACS/ACO and NCED genes are known to encode key enzymes required for ethylene and ABA biosynthesis, respectively, the transcriptional regulation of these genes is unclear in the process of plant organ shedding. Here, two polygalacturonase (PG) genes (LcPG1 and LcPG2) and two novel homeodomain-leucine zipper I transcription factors genes (LcHB2 and LcHB3) were identified as key genes associated with the fruitlet abscission in litchi. The expression of LcPG1 and LcPG2 was strongly associated with litchi fruitlet abscission, consistent with enhanced PG activity and reduced homogalacturonan content in fruitlet abscission zones (FAZs). The promoter activities of LcPG1/2 were enhanced by ethephon and ABA. In addition, the production of ethylene and ABA in fruitlets was significantly increased during fruit abscission. Consistently, expression of five genes (LcACO2, LcACO3, LcACS1, LcACS4 and LcACS7) related to ethylene biosynthesis and one gene (LcNCED3) related to ABA biosynthesis in FAZs were activated. Further, electrophoretic mobility shift assays and transient expression experiments demonstrated that both LcHB2 and LcHB3 could directly bind to the promoter of LcACO2/3, LcACS1/4/7 and LcNCED3 genes and activate their expression. Collectively, we propose that LcHB2/3 are involved in the litchi fruitlet abscission through positive regulation of ethylene and ABA biosynthesis.
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Affiliation(s)
- Caiqin Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Xingshuai Ma
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Xuming Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Huicong Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Hong Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
| | - Minglei Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jianguo Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China
- Guangdong Litchi Engineering Research Center, College of Horticulture, South China Agricultural University, Guangzhou, China
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Hur YS, Kim J, Kim S, Son O, Kim WY, Kim GT, Ohme-Takagi M, Cheon CI. Identification of TCP13 as an Upstream Regulator of ATHB12 during Leaf Development. Genes (Basel) 2019; 10:E644. [PMID: 31455029 PMCID: PMC6770448 DOI: 10.3390/genes10090644] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 01/24/2023] Open
Abstract
Leaves grow by distinct phases controlled by gene regulatory networks including many transcription factors. Arabidopsis thaliana homeobox 12 (ATHB12) promotes leaf growth especially during the cell expansion phase. In this study, we identify TCP13, a member of the TCP transcription factor family, as an upstream inhibitor of ATHB12. Yeast one-hybrid screening using a 1.2-kb upstream region of ATHB12 resulted in the isolation of TCP13 as well as other transcription factors. Transgenic plants constitutively expressing TCP13 displays a significant reduction in leaf cell size especially during the cell expansion period, while repression of TCP13 and its paralogs (TCP5 and TCP17) result in enlarged leaf cells, indicating that TCP13 and its paralogs inhibit leaf development, mainly at the cell expansion phase. Its expression pattern during leaf expansion phase is opposite to ATHB12 expression. Consistently, the expression of ATHB12 and its downstream genes decreases when TCP13 was overexpressed, and increases when the expression of TCP13 and its paralogs is repressed. In chromatin immunoprecipitation assays using TCP13-GFP plants, a fragment of the ATHB12 upstream region that contains the consensus sequence for TCP binding is strongly enriched. Taken together, these findings indicate that TCP13 and its paralogs inhibit leaf growth by repressing ATHB12 expression.
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Affiliation(s)
- Yoon-Sun Hur
- Department of Biological Science and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea
| | - Jiyoung Kim
- Department of Biological Science and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea
| | - Sunghan Kim
- Department of Biological Science and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea
| | - Ora Son
- Department of Biological Science and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea
| | - Woo-Young Kim
- College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Gyung-Tae Kim
- Bioproduction Department of Molecular Biotechnology, Dong-A University, Busan 49315, Korea
| | - Masaru Ohme-Takagi
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8566, Japan
- Institute for Environmental Science and Technology (IEST), Saitama University, Saitama 338-8570, Japan
| | - Choong-Ill Cheon
- Department of Biological Science and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea.
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Dong L, Qin L, Dai X, Ding Z, Bi R, Liu P, Chen Y, Brutnell TP, Wang X, Li P. Transcriptomic Analysis of Leaf Sheath Maturation in Maize. Int J Mol Sci 2019; 20:ijms20102472. [PMID: 31109136 PMCID: PMC6566692 DOI: 10.3390/ijms20102472] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/11/2019] [Accepted: 05/17/2019] [Indexed: 01/02/2023] Open
Abstract
The morphological development of the leaf greatly influences plant architecture and crop yields. The maize leaf is composed of a leaf blade, ligule and sheath. Although extensive transcriptional profiling of the tissues along the longitudinal axis of the developing maize leaf blade has been conducted, little is known about the transcriptional dynamics in sheath tissues, which play important roles in supporting the leaf blade. Using a comprehensive transcriptome dataset, we demonstrated that the leaf sheath transcriptome dynamically changes during maturation, with the construction of basic cellular structures at the earliest stages of sheath maturation with a transition to cell wall biosynthesis and modifications. The transcriptome again changes with photosynthesis and lignin biosynthesis at the last stage of sheath tissue maturation. The different tissues of the maize leaf are highly specialized in their biological functions and we identified 15 genes expressed at significantly higher levels in the leaf sheath compared with their expression in the leaf blade, including the BOP2 homologs GRMZM2G026556 and GRMZM2G022606, DOGT1 (GRMZM2G403740) and transcription factors from the B3 domain, C2H2 zinc finger and homeobox gene families, implicating these genes in sheath maturation and organ specialization.
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Affiliation(s)
- Lei Dong
- College of Agronomy, Synergetic Innovation Centre of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China.
| | - Lei Qin
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai'an 271018, China.
| | - Xiuru Dai
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai'an 271018, China.
| | - Zehong Ding
- The Institute of Tropical Bioscience and Biotechnology (ITBB), Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou 571101, China.
| | - Ran Bi
- Department of Statistics, Iowa State University, Ames, IA 50011, USA.
| | - Peng Liu
- Department of Statistics, Iowa State University, Ames, IA 50011, USA.
| | - Yanhui Chen
- College of Agronomy, Synergetic Innovation Centre of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China.
| | - Thomas P Brutnell
- College of Agronomy, Synergetic Innovation Centre of Henan Grain Crops and National Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, China.
| | - Xianglan Wang
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai'an 271018, China.
| | - Pinghua Li
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai'an 271018, China.
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Li W, Dong J, Cao M, Gao X, Wang D, Liu B, Chen Q. Genome-wide identification and characterization of HD-ZIP genes in potato. Gene 2019; 697:103-117. [PMID: 30776460 DOI: 10.1016/j.gene.2019.02.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 12/31/2018] [Accepted: 02/01/2019] [Indexed: 11/19/2022]
Abstract
HD-ZIP (Homeodomain leucine zipper) transcription factors play an important regulatory role in stress resistance in plants. The purpose of this study was to analyze the characteristics of the HD-ZIP genes/proteins and to study their expression profiles under high and low temperature conditions in potato (Solanum tuberosum L.). A strict homology search was used to find 43 HD-ZIP genes located on potato chromosomes 1-12. Exons/introns, protein features and conserved motifs were analyzed, and six segment duplications were identified from 43 HD-ZIP genes. Then, we analyzed the data from the PGSC (Potato Genome Sequencing Consortium) database regarding the expression of 43 HD-ZIP genes that were induced by biotic and abiotic stresses and phytohormone treatments and conducted an expression analysis for these genes across all potato life stages. Additionally, the expression levels of 13 HD-ZIP genes were analyzed under high temperature (37 °C) and low temperature (4 °C) conditions. The results showed that the transcript levels of all 13 genes changed, which indicated that these genes respond to heat and cold in plants. Especially for StHOX20, the expression significantly upregulated in roots at 37 °C and 4 °C. Our findings laid the foundation and provided clues for understanding the biological functions of HD-ZIP family genes.
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Affiliation(s)
- Wan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
| | - Jieya Dong
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
| | - Minxuan Cao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
| | - Xianxian Gao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
| | - Dongdong Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Bailin Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
| | - Qin Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
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Pomares-Viciana T, Del Río-Celestino M, Román B, Die J, Pico B, Gómez P. First RNA-seq approach to study fruit set and parthenocarpy in zucchini (Cucurbita pepo L.). BMC PLANT BIOLOGY 2019; 19:61. [PMID: 30727959 PMCID: PMC6366093 DOI: 10.1186/s12870-019-1632-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 01/04/2019] [Indexed: 05/29/2023]
Abstract
BACKGROUND Zucchini fruit set can be limited due to unfavourable environmental conditions in off-seasons crops that caused ineffective pollination/fertilization. Parthenocarpy, the natural or artificial fruit development without fertilization, has been recognized as an important trait to avoid this problem, and is related to auxin signalling. Nevertheless, differences found in transcriptome analysis during early fruit development of zucchini suggest that other complementary pathways could regulate fruit formation in parthenocarpic cultivars of this species. The development of next-generation sequencing technologies (NGS) as RNA-sequencing (RNA-seq) opens a new horizon for mapping and quantifying transcriptome to understand the molecular basis of pathways that could regulate parthenocarpy in this species. The aim of the current study was to analyze fruit transcriptome of two cultivars of zucchini, a non-parthenocarpic cultivar and a parthenocarpic cultivar, in an attempt to identify key genes involved in parthenocarpy. RESULTS RNA-seq analysis of six libraries (unpollinated, pollinated and auxin treated fruit in a non-parthenocarpic and parthenocarpic cultivar) was performed mapping to a new version of C. pepo transcriptome, with a mean of 92% success rate of mapping. In the non-parthenocarpic cultivar, 6479 and 2186 genes were differentially expressed (DEGs) in pollinated fruit and auxin treated fruit, respectively. In the parthenocarpic cultivar, 10,497 in pollinated fruit and 5718 in auxin treated fruit. A comparison between transcriptome of the unpollinated fruit for each cultivar has been performed determining that 6120 genes were differentially expressed. Annotation analysis of these DEGs revealed that cell cycle, regulation of transcription, carbohydrate metabolism and coordination between auxin, ethylene and gibberellin were enriched biological processes during pollinated and parthenocarpic fruit set. CONCLUSION This analysis revealed the important role of hormones during fruit set, establishing the activating role of auxins and gibberellins against the inhibitory role of ethylene and different candidate genes that could be useful as markers for parthenocarpic selection in the current breeding programs of zucchini.
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Affiliation(s)
- Teresa Pomares-Viciana
- Genomics and Biotechnology Department, IFAPA Research Centre La Mojonera, Camino de San Nicolás, 1, 04745 La Mojonera, Almería, Spain
| | - Mercedes Del Río-Celestino
- Genomics and Biotechnology Department, IFAPA Research Centre La Mojonera, Camino de San Nicolás, 1, 04745 La Mojonera, Almería, Spain
| | - Belén Román
- Genomics and Biotechnology Department, IFAPA Research Centre Alameda del Obispo, Avd. Menéndez Pidal s/n, 14004 Córdoba, Spain
| | - Jose Die
- Genetics Department, University of Cordoba, Av. de Medina Azahara, 5, 14071 Córdoba, Spain
| | - Belén Pico
- Institute for the Conservation and Breeding of Agricultural Biodiversity (COMAV-UPV), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Pedro Gómez
- Genomics and Biotechnology Department, IFAPA Research Centre La Mojonera, Camino de San Nicolás, 1, 04745 La Mojonera, Almería, Spain
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Gu C, Guo ZH, Cheng HY, Zhou YH, Qi KJ, Wang GM, Zhang SL. A HD-ZIP II HOMEBOX transcription factor, PpHB.G7, mediates ethylene biosynthesis during fruit ripening in peach. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 278:12-19. [PMID: 30471725 DOI: 10.1016/j.plantsci.2018.10.008] [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: 06/28/2018] [Revised: 10/04/2018] [Accepted: 10/08/2018] [Indexed: 05/10/2023]
Abstract
Homeobox transcription factors belong to a superfamily that has been widely studied in plant growth and development, but little is known regarding their role in fruit development and ripening. Using a genome-wide expression analysis of homeobox (HB) genes and quantitative real-time PCR, a HD-ZIP II member, PpHB.G7, which presented higher levels of expression in ripening fruits than in developing fruits in all of the tested cultivars, was isolated from peach. Transient transformations showed that PpHB.G7 affects ethylene production and the expression of ethylene biosynthesis genes (PpACS1 and PpACO1). Both dual-luciferase and yeast one-hybrid assays confirmed that PpHB.G7 interacts with the promoters of PpACS1 and PpACO1. Thus, PpHB.G7 mediates ethylene biosynthesis by stimulating PpACS1 and PpACO1 activities. Furthermore, we also found that the other eight HB genes were differentially expressed in the developing fruits, with seven of these genes belonging to the HD-ZIP family. These results suggest that the HB genes in the HD-ZIP family play important roles in fruit development and ripening.
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Affiliation(s)
- Chao Gu
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Zhi-Hua Guo
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hai-Yan Cheng
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu-Hang Zhou
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kai-Jie Qi
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guo-Ming Wang
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shao-Ling Zhang
- College of Horticulture/State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
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48
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Stochasticity in transcriptional expression of a negative regulator of Arabidopsis ABA network. 3 Biotech 2019; 9:15. [PMID: 30622853 DOI: 10.1007/s13205-018-1542-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 12/16/2018] [Indexed: 10/27/2022] Open
Abstract
Stably heritable spatiotemporal co/over-expression of distinct transcriptional regulators across generations is a desired target as they signal traffic in the cell. Here, the stability and expression pattern of AtHB7 (Arabidopsis homeodomain-leucine zipper class I) cDNA was characterized in 220 random population of transformed tomato clones where no AtHB7 orthologous has been identified in to date. Integration of p35S::AtHB7 casette was tested by the amplification of the stretches (700/425 bp) in the target by NPT II/AtHB7 oligos. Transcriptional expression pattern for the amplicons of the specific transcripts in the leaf tissues of transformants were determined by qRT-PCR. Transgene copy number was negatively correlated with transgene expression level, yet a majority of transformants (78%) carried single-copy of transgene. About 1:3 of the lines containing two-copy inserts showed less transcript expression. Heterologous CaMV 35S promoter drove AtHB7, illuminated no penalty on transgene expression levels, stability or plant phenotype under drought stress. Integration and expression analysis of transcription factors is of great significance for reliable prediction of gene dosing/functions in plant genomes so as to sustain breeding under abiotic stress to guarantee food security.
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He X, Wang T, Zhu W, Wang Y, Zhu L. GhHB12, a HD-ZIP I Transcription Factor, Negatively Regulates the Cotton Resistance to Verticillium dahliae. Int J Mol Sci 2018; 19:E3997. [PMID: 30545043 PMCID: PMC6321269 DOI: 10.3390/ijms19123997] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/04/2018] [Accepted: 12/08/2018] [Indexed: 12/18/2022] Open
Abstract
The homeodomain-leucine zipper (HD-ZIP) is a plant-specific transcription factor family that plays important roles in plant developmental processes in response to multiple stressors. We previously isolated a cotton HD-ZIP class I transcription factor gene, GhHB12, which is regulated by the circadian clock and photoperiodism. Furthermore, it regulates cotton architecture, phase transition, and photoperiod sensitivity. Here we report that GhHB12 was induced by methyl jasmonate (MeJA) and Verticillium dahliae infection. Additionally, stress-responsive elements were found in the GhHB12 promoter. Promoter fusion analysis showed that GhHB12 was predominantly expressed in primary roots and that it was induced by mechanical damage. Overexpression of GhHB12 increased susceptibility of the cotton plant to the fungal pathogens Botrytis cinerea and V. dahliae, which was coupled with suppression of the jasmonic acid (JA)-response genes GhJAZ2 and GhPR3. Our results suggest that GhHB12, a cotton stress-responsive HD-ZIP I transcription factor, negatively regulates cotton resistance to V. dahliae by suppressing JA-response genes.
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Affiliation(s)
- Xin He
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Hunan Agricultural University, Changsha 410128, China.
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
| | - Tianyi Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
| | - Wan Zhu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
| | - Yujing Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
| | - Longfu Zhu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
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50
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Jeon BW, Kim J. Role of LBD14 during ABA-mediated control of root system architecture in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2018; 13:e1507405. [PMID: 30125143 PMCID: PMC6149438 DOI: 10.1080/15592324.2018.1507405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 07/23/2018] [Indexed: 05/31/2023]
Abstract
The LATERAL ORGAN BOUNDARIES DOMAIN/ASYMMETRIC LEAVES2-LIKE (LBD/ASL) gene family encode plant-specific transcription factors that regulate various aspects of plant growth and development. Arabidopsis genome has 42 LBD genes. Several LBD genes, such as LBD16, -18, -29, and -33, have been shown to function in lateral root (LR) development via auxin signaling. Although abscisic acid (ABA) is a well-known antistress plant hormone regulating various plant developmental processes, it also plays a role in LR growth regulation. Our recent study showed that LBD14 expression is downregulated by ABA during the entire steps of LR development. The RNAi-induced downregulation and overexpression of LBD14 indicated that LBD14 promotes LR formation. LBD14RNAi enhanced the ABA-induced suppression of LR density compared with the wild type, suggesting that LBD14 is involved in the ABA-mediated control of LR formation. Our study provides an insight into the signaling mechanism of developmental plasticity whereby ABA controls LR branching via LBD14 downregulation under abiotic stress conditions.
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Affiliation(s)
- Byeong Wook Jeon
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, Korea
| | - Jungmook Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, Korea
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