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Singh D, Dwivedi S, Singh N, Trivedi PK. HY5 and COP1 function antagonistically in the regulation of nicotine biosynthesis in Nicotiana tabacum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108916. [PMID: 39002305 DOI: 10.1016/j.plaphy.2024.108916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/30/2024] [Accepted: 07/04/2024] [Indexed: 07/15/2024]
Abstract
Nicotine constitutes approximately 90% of the total alkaloid content in leaves within the Nicotiana species, rendering it the most prevalent alkaloid. While the majority of genes responsible for nicotine biosynthesis express in root tissue, the influence of light on this process through shoot-to-root mobile ELONGATED HYPOCOTYL 5 (HY5) has been recognized. CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1), a key regulator of light-associated responses, known for its role in modulating HY5 accumulation, remains largely unexplored in its relationship to light-dependent nicotine accumulation. Here, we identified NtCOP1, a COP1 homolog in Nicotiana tabacum, and demonstrated its ability to complement the cop1-4 mutant in Arabidopsis thaliana at molecular, morphological, and biochemical levels. Through the development of NtCOP1 overexpression (NtCOP1OX) plants, we observed a significant reduction in nicotine and flavonol content, inversely correlated with the down-regulation of nicotine and phenylpropanoid pathway. Conversely, CRISPR/Cas9-based knockout mutant plants (NtCOP1CR) exhibited an increase in nicotine levels. Further investigations, including yeast-two hybrid assays, grafting experiments, and Western blot analyses, revealed that NtCOP1 modulates nicotine biosynthesis by targeting NtHY5, thereby impeding its transport from shoot-to-root. We conclude that the interplay between HY5 and COP1 functions antagonistically in the light-dependent regulation of nicotine biosynthesis in tobacco.
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Affiliation(s)
- Deeksha Singh
- Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shambhavi Dwivedi
- Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India
| | - Nivedita Singh
- Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India
| | - Prabodh Kumar Trivedi
- Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India; CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow, 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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2
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Fu H, Zhong J, Zhao J, Huo L, Wang C, Ma D, Pan W, Sun L, Ren Z, Fan T, Wang Z, Wang W, Lei X, Yu G, Li J, Zhu Y, Geelen D, Liu B. Ultraviolet attenuates centromere-mediated meiotic genome stability and alters gametophytic ploidy consistency in flowering plants. THE NEW PHYTOLOGIST 2024; 243:2214-2234. [PMID: 39039772 DOI: 10.1111/nph.19978] [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: 03/15/2024] [Accepted: 06/29/2024] [Indexed: 07/24/2024]
Abstract
Ultraviolet (UV) radiation influences development and genome stability in organisms; however, its impact on meiosis, a special cell division essential for the delivery of genetic information across generations in eukaryotes, has not yet been elucidated. In this study, by performing cytogenetic studies, we reported that UV radiation does not damage meiotic chromosome integrity but attenuates centromere-mediated chromosome stability and induces unreduced gametes in Arabidopsis thaliana. We showed that functional centromere-specific histone 3 (CENH3) is required for obligate crossover formation and plays a role in the protection of sister chromatid cohesion under UV stress. Moreover, we found that UV specifically alters the orientation and organization of spindles and phragmoplasts at meiosis II, resulting in meiotic restitution and unreduced gametes. We determined that UV-induced meiotic restitution does not rely on the UV Resistance Locus8-mediated UV perception and the Tapetal Development and Function1- and Aborted Microspores-dependent tapetum development, but possibly occurs via altered JASON function and downregulated Parallel Spindle1. This study provides evidence that UV radiation influences meiotic genome stability and gametophytic ploidy consistency in flowering plants.
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Affiliation(s)
- Huiqi Fu
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Jiaqi Zhong
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Jiayi Zhao
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Li Huo
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Chong Wang
- Shanghai Key Laboratory of Plant Molecular Sciences, Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Dexuan Ma
- Shanghai Key Laboratory of Plant Molecular Sciences, Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Wenjing Pan
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Limin Sun
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, 9000, Belgium
| | - Ziming Ren
- Department of Landscape Architecture, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Tianyi Fan
- Department of Biochemistry, Institute of Plant Biology, School of Life Sciences, State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, 200438, China
| | - Ze Wang
- College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Wenyi Wang
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Xiaoning Lei
- School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Guanghui Yu
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
| | - Jing Li
- College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Yan Zhu
- Department of Biochemistry, Institute of Plant Biology, School of Life Sciences, State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, Fudan University, Shanghai, 200438, China
| | - Danny Geelen
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, 9000, Belgium
| | - Bing Liu
- College of Life Sciences, South-Central Minzu University, Wuhan, 430074, China
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Zhang Y, Liu X, Shi Y, Lang L, Tao S, Zhang Q, Qin M, Wang K, Xu Y, Zheng L, Cao H, Wang H, Zhu Y, Song J, Li K, Xu A, Huang Z. The B-box transcription factor BnBBX22.A07 enhances salt stress tolerance by indirectly activating BnWRKY33.C03. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39189937 DOI: 10.1111/pce.15119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 06/21/2024] [Accepted: 08/15/2024] [Indexed: 08/28/2024]
Abstract
Salt stress has a detrimental impact on both plant growth and global crop yields. B-box proteins have emerged as pivotal players in plant growth and development regulation. Although the precise role of B-box proteins orchestrating salt stress responses in B. napus (Brassica napus) is not well understood in the current literature, further research and molecular explorations are required. Here, we isolated the B-box protein BnBBX22.A07 from B. napus. The overexpression of BnBBX22.A07 significantly improved the salt tolerance of Arabidopsis (Arabidopsis thaliana) and B. napus. Transcriptomic and histological analysis showed that BnBBX22.A07 enhanced the salt tolerance of B. napus by activating the expression of reactive oxygen species (ROS) scavenging-related genes and decreasing salt-induced superoxide anions and hydrogen peroxide. Moreover, BnBBX22.A07 interacted with BnHY5.C09, which specifically bound to and activated the promoter of BnWRKY33.C03. The presence of BnBBX22.A07 enhanced the activation of BnHY5.C09 on BnWRKY33.C03. Overexpression of BnHY5.C09 and BnWRKY33.C03 improved the salt tolerance of Arabidopsis. Functional analyses revealed that BnBBX22.A07-mediated salt tolerance was partly dependent on WRKY33. Taken together, we demonstrate that BnBBX22.A07 functions positively in salt responses not only by activating ROS scavenging-related genes but also by indirectly activating BnWRKY33.C03. Notably, our study offers a promising avenue for the identification of candidate genes that could be harnessed in breeding endeavours to develop salt-resistant transgenic crops.
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Affiliation(s)
- Yan Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Xiang Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Yiji Shi
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Lina Lang
- Shandong Seed Administration Station, Jinan, China
| | - Shunxian Tao
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Qi Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Mengfan Qin
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Kai Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Yu Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Lin Zheng
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Hanming Cao
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Han Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Yunlin Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Jia Song
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Keqi Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Aixia Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
| | - Zhen Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling, China
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Singh D, Dwivedi S, Sinha H, Singh N, Trivedi PK. Mutation in shoot-to-root mobile transcription factor, ELONGATED HYPOCOTYL 5, leads to low nicotine levels in tobacco. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133255. [PMID: 38103287 DOI: 10.1016/j.jhazmat.2023.133255] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/06/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
Tobacco remains one of the most commercially important crops due to the parasympathomimetic alkaloid nicotine used in cigarettes. Most genes involved in nicotine biosynthesis are expressed in root tissues; however, their light-dependent regulation has not been studied. Here, we identified the ELONGATED HYPOCOTYL 5 homolog, NtHY5, from Nicotiana tabacum and demonstrated that NtHY5 could complement the Arabidopsis thaliana hy5 mutant at molecular, morphological and biochemical levels. We report the development of CRISPR/Cas9-based knockout mutant plants of tobacco, NtHY5CR, and show down-regulation of the nicotine and phenylpropanoid pathway genes leading to a significant reduction in nicotine and flavonol content, whereas NtHY5 overexpression (NtHY5OX) plants show the opposite effect. Grafting experiments using wild-type, NtHY5CR, and NtHY5OX indicated that NtHY5 moves from shoot-to-root to regulate nicotine biosynthesis in the root tissue. Shoot HY5, directly or through enhancing expression of the root HY5, promotes nicotine biosynthesis by binding to light-responsive G-boxes present in the NtPMT, NtQPT and NtODC promoters. We conclude that the mobility of HY5 from shoot-to-root regulates light-dependent nicotine biosynthesis. The CRISPR/Cas9-based mutants developed, in this study; with low nicotine accumulation in leaves could help people to overcome their nicotine addiction and the risk of death.
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Affiliation(s)
- Deeksha Singh
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shambhavi Dwivedi
- Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India
| | - Hiteshwari Sinha
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Nivedita Singh
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India
| | - Prabodh Kumar Trivedi
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India.
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5
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Sharma M, Sidhu AK, Samota MK, Gupta M, Koli P, Choudhary M. Post-Translational Modifications in Histones and Their Role in Abiotic Stress Tolerance in Plants. Proteomes 2023; 11:38. [PMID: 38133152 PMCID: PMC10747722 DOI: 10.3390/proteomes11040038] [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: 10/12/2023] [Revised: 11/06/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023] Open
Abstract
Abiotic stresses profoundly alter plant growth and development, resulting in yield losses. Plants have evolved adaptive mechanisms to combat these challenges, triggering intricate molecular responses to maintain tissue hydration and temperature stability during stress. A pivotal player in this defense is histone modification, governing gene expression in response to diverse environmental cues. Post-translational modifications (PTMs) of histone tails, including acetylation, phosphorylation, methylation, ubiquitination, and sumoylation, regulate transcription, DNA processes, and stress-related traits. This review comprehensively explores the world of PTMs of histones in plants and their vital role in imparting various abiotic stress tolerance in plants. Techniques, like chromatin immune precipitation (ChIP), ChIP-qPCR, mass spectrometry, and Cleavage Under Targets and Tag mentation, have unveiled the dynamic histone modification landscape within plant cells. The significance of PTMs in enhancing the plants' ability to cope with abiotic stresses has also been discussed. Recent advances in PTM research shed light on the molecular basis of stress tolerance in plants. Understanding the intricate proteome complexity due to various proteoforms/protein variants is a challenging task, but emerging single-cell resolution techniques may help to address such challenges. The review provides the future prospects aimed at harnessing the full potential of PTMs for improved plant responses under changing climate change.
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Affiliation(s)
- Madhvi Sharma
- Post Graduate Department of Biotechnology, Khalsa College, Amritsar 143009, India; (M.S.); (A.K.S.)
| | - Amanpreet K. Sidhu
- Post Graduate Department of Biotechnology, Khalsa College, Amritsar 143009, India; (M.S.); (A.K.S.)
| | - Mahesh Kumar Samota
- ICAR-Central Institute of Post-Harvest Engineering and Technology, Regional Station, Abohar 152116, India
| | - Mamta Gupta
- ICAR-Indian Institute of Maize Research, Ludhiana 141001, India;
| | - Pushpendra Koli
- Plant Animal Relationship Division, ICAR-Indian Grassland and Fodder Research Institute, Jhansi 284003, India;
- Post-Harvest Biosecurity, Murdoch University, Perth, WA 6150, Australia
| | - Mukesh Choudhary
- ICAR-Indian Institute of Maize Research, Ludhiana 141001, India;
- School of Agriculture and Environment, The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
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An X, Zhao S, Luo X, Chen C, Liu T, Li W, Zou L, Sun C. Genome-wide identification and expression analysis of the regulator of chromosome condensation 1 gene family in wheat ( Triticum aestivum L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1124905. [PMID: 36909424 PMCID: PMC9998523 DOI: 10.3389/fpls.2023.1124905] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Wheat (Triticum aestivum L., 2n = 6x = 42, AABBDD) is the world's most widely cultivated crop and an important staple food for humans, accounting for one-fifth of calories consumed. Proteins encoded by the regulator of chromosome condensation 1 (RCC1) are highly conserved among eukaryotes and consist of seven repeated domains that fold into a seven-bladed propeller structure. In this study, a total of 76 RCC1 genes of bread wheat were identified via a genome-wide search, and their phylogenetic relationship, gene structure, protein-conserved domain, chromosome localization, conserved motif, and transcription factor binding sites were systematically analyzed using the bioinformatics approach to indicate the evolutionary and functional features of these genes. The expression patterns of 76 TaRCC1 family genes in wheat under various stresses were further analyzed, and RT-PCR verified that RCC1-3A (TraesCS3A02G362800), RCC1-3B (TraesCS3B02G395200), and RCC1-3D (TraesCS3D02G35650) were significantly induced by salt, cold, and drought stresses. Additionally, the co-expression network analysis and binding site prediction suggested that Myb-7B (TraesCS7B02G188000) and Myb-7D (TraesCS7D02G295400) may bind to the promoter of RCC1-3A/3B and upregulate their expression in response to abiotic stresses in wheat. The results have furthered our understanding of the wheat RCC1 family members and will provide important information for subsequent studies and the use of RCC1 genes in wheat.
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Affiliation(s)
- Xia An
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Shuqi Zhao
- Cotton and Wheat Research Institute, Huanggang Academy of Agricultural Sciences, Huanggang, China
| | - Xiahong Luo
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Changli Chen
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Tingting Liu
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Wenlue Li
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Lina Zou
- Zhejiang Xiaoshan Institute of Cotton and Bast Fiber Crops, Zhejiang Institute of Landscape Plants and Flowers, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Chendong Sun
- The Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
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7
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Zhang Q, Lin L, Fang F, Cui B, Zhu C, Luo S, Yin R. Dissecting the functions of COP1 in the UVR8 pathway with a COP1 variant in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 113:478-492. [PMID: 36495441 DOI: 10.1111/tpj.16059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/21/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
COP1 is a critical repressor of plant photomorphogenesis in darkness. However, COP1 plays distinct roles in the photoreceptor UVR8 pathway in Arabidopsis thaliana. COP1 interacts with ultraviolet B (UV-B)-activated UVR8 monomers and promotes their retention and accumulation in the nucleus. Moreover, COP1 has a function in UV-B signaling, which involves the binding of its WD40 domain to UVR8 and HY5 via conserved Val-Pro (VP) motifs of these proteins. UV-B-activated UVR8 interacts with COP1 via both the core domain and the VP motif, leading to the displacement of HY5 from COP1 and HY5 stabilization. However, it remains unclear whether the function of COP1 in UV-B signaling is solely dependent on its VP motif binding capacity and whether UV-B regulates the subcellular localization of COP1. Based on published structures of the COP1 WD40 domain, we generated a COP1 variant with a single amino acid substitution, COP1C509S , which cannot bind to VP motifs but retains the ability to interact with the UVR8 core domain. UV-B only marginally increased nuclear YFP-COP1 levels and significantly promoted YFP-COP1 accumulation in the cytosol, but did not exert the same effects on YFP-COP1C509S . Thus, the full UVR8-COP1 interaction is important for COP1 accumulation in the cytosol. Notably, UV-B signaling including activation of HY5 transcription was obviously inhibited in the Arabidopsis lines expressing YFP-COP1C509S , which cannot bind VP motifs. We conclude that the full binding of UVR8 to COP1 leads to the predominant accumulation of COP1 in the cytosol and that COP1 has an additional function in UV-B signaling besides VP binding-mediated protein destabilization.
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Affiliation(s)
- Qianwen Zhang
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai, 200240, China
| | - Li Lin
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai, 200240, China
- Key Laboratory of Urban Agriculture Ministry of Agriculture, Shanghai Jiao Tong University, 200240, Shanghai, China
- Joint Center for Single Cell Biology, Shanghai Jiao Tong University, 200240, Shanghai, China
| | - Fang Fang
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai, 200240, China
| | - Beimi Cui
- Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3BF, UK
| | - Cheng Zhu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Shukun Luo
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Ruohe Yin
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan RD. Minhang District, Shanghai, 200240, China
- Key Laboratory of Urban Agriculture Ministry of Agriculture, Shanghai Jiao Tong University, 200240, Shanghai, China
- Joint Center for Single Cell Biology, Shanghai Jiao Tong University, 200240, Shanghai, China
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Effects and Mechanism of Enhanced UV-B Radiation on the Flag Leaf Angle of Rice. Int J Mol Sci 2022; 23:ijms232112776. [PMID: 36361567 PMCID: PMC9654109 DOI: 10.3390/ijms232112776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/25/2022] Open
Abstract
Leaf angle is an influential agricultural trait that influences rice (Oryza sativa L.) plant type and yield, which results from the leaf bending from the vertical axis to the abaxial axis. UV-B radiation affects plant morphology, but the effects of varying UV-B intensities on rice flag leaves and the underlying molecular, cellular, and physiological mechanisms remain unknown. This experiment aims to examine the effect of natural light and field-enhanced UV-B radiation (2.5, 5.0, 7.5 kJ·m−2) on the leaf angle of the traditional rice variety Baijiaolaojing on Yuanyang terraces. In comparison with natural light, the content of brassinolide and gibberellin in rice flag leaves increased by 29.94% and 60.1%, respectively. The auxin content decreased by 17.3%. Compared with the natural light treatment, the cellulose content in the pulvini was reduced by 13.8% and hemicellulose content by 25.7% under 7.5 kJ·m−2 radiation intensity. The thick-walled cell area and vascular bundle area of the leaf pulvini decreased with increasing radiation intensity, and the growth of mechanical tissue in the rice leaf pulvini was inhibited. The flag leaf angle of rice was greatest at 7.5 kJ·m−2 radiation intensity, with an increase of 50.2%. There are two pathways by which the angle of rice flag leaves is controlled under high-intensity UV-B radiation. The leaf angle regulation genes OsBUL1, OsGSR1, and OsARF19 control hormone levels, whereas the ILA1 gene controls fiber levels. Therefore, as cellulose, hemicellulose, sclerenchyma, and vascular bundles weaken the mechanical support of the pulvini, the angle of the flag leaf increases.
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Wiesner-Reinhold M, Dutra Gomes JV, Herz C, Tran HTT, Baldermann S, Neugart S, Filler T, Glaab J, Einfeldt S, Schreiner M, Lamy E. Subsequent treatment of leafy vegetables with low doses of UVB-radiation does not provoke cytotoxicity, genotoxicity, or oxidative stress in a human liver cell model. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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10
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Basu R, Dutta S, Pal A, Sengupta M, Chattopadhyay S. Calmodulin7: recent insights into emerging roles in plant development and stress. PLANT MOLECULAR BIOLOGY 2021; 107:1-20. [PMID: 34398355 DOI: 10.1007/s11103-021-01177-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 07/27/2021] [Indexed: 05/25/2023]
Abstract
Analyses of the function of Arabidopsis Calmodulin7 (CAM7) in concert with multiple regulatory proteins involved in various signal transduction processes. Calmodulin (CaM) plays various regulatory roles in multiple signaling pathways in eukaryotes. Arabidopsis CALMODULIN 7 (CAM7) is a unique member of the CAM family that works as a transcription factor in light signaling pathways. CAM7 works in concert with CONSTITUTIVE PHOTOMORPHOGENIC 1 and ELONGATED HYPOCOTYL 5, and plays an important role in seedling development. Further, it is involved in the regulation of the activity of various Ca2+-gated channels such as cyclic nucleotide gated channel 6 (CNGC6), CNGC14 and auto-inhibited Ca2+ ATPase 8. Recent studies further indicate that CAM7 is also an integral part of multiple signaling pathways including hormone, immunity and stress. Here, we review the recent advances in understanding the multifaceted role of CAM7. We highlight the open-ended questions, and also discuss the diverse aspects of CAM7 characterization that need to be addressed for comprehensive understanding of its cellular functions.
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Affiliation(s)
- Riya Basu
- Department of Biotechnology, National Institute of Technology, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Siddhartha Dutta
- Department of Biotechnology, National Institute of Technology, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
- Department of Biotechnology, University of Engineering and Management, University Area, Plot, Street Number 03, Action Area III, B/5, Newtown, Kolkata, West Bengal, 700156, India
| | - Abhideep Pal
- Department of Biotechnology, National Institute of Technology, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Mandar Sengupta
- Department of Biotechnology, National Institute of Technology, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India
| | - Sudip Chattopadhyay
- Department of Biotechnology, National Institute of Technology, Mahatma Gandhi Avenue, Durgapur, West Bengal, 713209, India.
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Wang X, Liu S, Zuo H, Zheng W, Zhang S, Huang Y, Pingcuo G, Ying H, Zhao F, Li Y, Liu J, Yi TS, Zan Y, Larkin RM, Deng X, Zeng X, Xu Q. Genomic basis of high-altitude adaptation in Tibetan Prunus fruit trees. Curr Biol 2021; 31:3848-3860.e8. [PMID: 34314676 DOI: 10.1016/j.cub.2021.06.062] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/25/2021] [Accepted: 06/22/2021] [Indexed: 01/03/2023]
Abstract
The Great Himalayan Mountains and their foothills are believed to be the place of origin and development of many plant species. The genetic basis of adaptation to high plateaus is a fascinating topic that is poorly understood at the population level. We comprehensively collected and sequenced 377 accessions of Prunus germplasm along altitude gradients ranging from 2,067 to 4,492 m in the Himalayas. We de novo assembled three high-quality genomes of Tibetan Prunus species. A comparative analysis of Prunus genomes indicated a remarkable expansion of the SINE retrotransposons occurred in the genomes of Tibetan species. We observed genetic differentiation between Tibetan peaches from high and low altitudes and that genes associated with light stress signaling, especially UV stress signaling, were enriched in the differentiated regions. By profiling the metabolomes of Tibetan peach fruit, we determined 379 metabolites had significant genetic correlations with altitudes and that in particular phenylpropanoids were positively correlated with altitudes. We identified 62 Tibetan peach-specific SINEs that colocalized with metabolites differentially accumualted in Tibetan relative to cultivated peach. We demonstrated that two SINEs were inserted in a locus controlling the accumulation of 3-O-feruloyl quinic acid. SINE1 was specific to Tibetan peach. SINE2 was predominant in high altitudes and associated with the accumulation of 3-O-feruloyl quinic acid. These genomic and metabolic data for Prunus populations native to the Himalayan region indicate that the expansion of SINE retrotransposons helped Tibetan Prunus species adapt to the harsh environment of the Himalayan plateau by promoting the accumulation of beneficial metabolites.
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Affiliation(s)
- Xia Wang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Shengjun Liu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Zuo
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Weikang Zheng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Shanshan Zhang
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China
| | - Yue Huang
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Gesang Pingcuo
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China
| | - Hong Ying
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China
| | - Fan Zhao
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China
| | - Yuanrong Li
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China
| | - Junwei Liu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Ting-Shuang Yi
- Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yanjun Zan
- Department of Forestry Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå 90736, Sweden
| | - Robert M Larkin
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China
| | - Xiuxin Deng
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China
| | - Xiuli Zeng
- Qinghai-Tibet Plateau Fruit Trees Scientific Observation Test Station (Ministry of Agriculture and Rural Affairs), Lhasa, Tibet 850032, China; Institute of Vegetables, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850002, China.
| | - Qiang Xu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan 430070, China; Key Laboratory of Horticultural Crop (Fruit trees) Biology and Genetic Improvement (Ministry of Agriculture and Rural Affairs), Huazhong Agricultural University, Wuhan 430070, China.
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12
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Dong H, Liu X, Zhang C, Guo H, Liu Y, Chen H, Yin R, Lin L. Expression of Tomato UVR8 in Arabidopsis reveals conserved photoreceptor function. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 303:110766. [PMID: 33487351 DOI: 10.1016/j.plantsci.2020.110766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/27/2020] [Accepted: 11/15/2020] [Indexed: 06/12/2023]
Abstract
UV RESISTANCE LOCUS 8 (UVR8) is a photoreceptor that regulates UV-B photomorphogenesis in plants. UV-B photon perception promotes UVR8 homodimer dissociation into monomer, which is reverted to homodimer post UV-B, forming a complete photocycle. UVR8 monomer interacts with CONSTITUTIVELY PHOTOMORPHOGENEIC 1 (COP1) to initiate UV-B signaling. The function and mechanism of Arabidopsis UVR8 (AtUVR8) are extensively investigated, however, little is known about UVR8 and its signaling mechanisms in other plant species. Tomato is a widely used model plant for horticulture research. In this report we tested whether an ortholog of AtUVR8 in Tomato (SIUVR8) can complement Arabidopsis uvr8 mutant and whether the above-mentioned key signaling mechanisms of UVR8 are conserved. Heterologous expressed SIUVR8 in an Arabidopsis uvr8 null mutant rescued the uvr8 mutant in the tested UV-B responses including hypocotyl elongation, UV-B target gene expression and anthocyanin accumulation, demonstrating that the SIUVR8 is a putative UV-B photoreceptor. Moreover, in response to UV-B, SIUVR8 forms a protein complex with Arabidopsis COP1 in plants, suggesting conserved signaling mechanism. SIUVR8 exhibits similar photocycle as AtUVR8 in plants, which highlights conserved photoreceptor activation and inactivation mechanisms.
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Affiliation(s)
- Huaxi Dong
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Xiaorui Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Chunli Zhang
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Huicong Guo
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Yang Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Huoying Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Ruohe Yin
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China; Key Laboratory of Urban Agriculture, Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
| | - Li Lin
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, 200240, PR China.
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13
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Lin L, Dong H, Yang G, Yin R. The C-terminal 17 amino acids of the photoreceptor UVR8 is involved in the fine-tuning of UV-B signaling. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:1327-1340. [PMID: 32492260 DOI: 10.1111/jipb.12977] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 06/01/2020] [Indexed: 05/26/2023]
Abstract
Plant UV-B responses are mediated by the photoreceptor UV RESISTANCE LOCUS 8 (UVR8). In response to UV-B irradiation, UVR8 homodimers dissociate into monomers that bind to the E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1). The interaction of the C27 domain in the C-terminal tail of UVR8 with the WD40 domain of COP1 is critical for UV-B signaling. However, the function of the last 17 amino acids (C17) of the C-terminus of UVR8, which are adjacent to C27, is unknown, although they are largely conserved in land plants. In this study, we established that Arabidopsis thaliana UVR8 C17 binds to full-length UVR8, but not to COP1, and reduces COP1 binding to the remaining portion of UVR8, including C27. We hypothesized that overexpression of C17 in a wild-type background would have a dominant negative effect on UVR8 activity; however, C17 overexpression caused strong silencing of endogenous UVR8, precluding a detailed analysis. We therefore generated YFP-UVR8N423 transgenic lines, in which C17 was deleted, to examine C17 function indirectly. YFP-UVR8N423 was more active than YFP-UVR8, suggesting that C17 inhibits UV-B signaling by attenuating binding between C27 and COP1. Our study reveals an inhibitory role for UVR8 C17 in fine-tuning UVR8-COP1 interactions during UV-B signaling.
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Affiliation(s)
- Li Lin
- Joint Center for Single Cell Biology, Key Laboratory of Urban Agriculture Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Huaxi Dong
- Joint Center for Single Cell Biology, Key Laboratory of Urban Agriculture Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Guoqian Yang
- Joint Center for Single Cell Biology, Key Laboratory of Urban Agriculture Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Ruohe Yin
- Joint Center for Single Cell Biology, Key Laboratory of Urban Agriculture Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China
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Yan Y, Stoddard FL, Neugart S, Oravec M, Urban O, Sadras VO, Aphalo PJ. The transgenerational effects of solar short-UV radiation differed in two accessions of Vicia faba L. from contrasting UV environments. JOURNAL OF PLANT PHYSIOLOGY 2020; 248:153145. [PMID: 32145578 DOI: 10.1016/j.jplph.2020.153145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/03/2020] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND AIMS UVB radiation can rapidly induce gene regulation leading to cumulative changes for plant physiology and morphology. We hypothesized that a transgenerational effect of chronic exposure to solar short UV modulates the offspring's responses to UVB and blue light, and that the transgenerational effect is genotype dependent. METHODS We established a factorial experiment combining two Vicia faba L. accessions, two parental UV treatments (full sunlight and exclusion of short UV, 290-350 nm), and four offspring light treatments from the factorial combination of UVB and blue light. The accessions were Aurora from southern Sweden, and ILB938 from Andean region of Colombia and Ecuador. KEY RESULTS The transgenerational effect influenced morphological responses to blue light differently in the two accessions. In Aurora, when UVB was absent, blue light increased shoot dry mass only in plants whose parents were protected from short UV. In ILB938, blue light increased leaf area and shoot dry mass more in plants whose parents were exposed to short UV than those that were not. Moreover, when the offspring was exposed to UVB, the transgenerational effect decreased in ILB938 and disappeared in Aurora. For flavonoids, the transgenerational effect was detected only in Aurora: parental exposure to short UV was associated with a greater induction of total quercetin in response to UVB. Transcript abundance was higher in Aurora than in ILB938 for both CHALCONE SYNTHASE (99-fold) and DON-GLUCOSYLTRANSFERASE 1 (19-fold). CONCLUSIONS The results supported both hypotheses. Solar short UV had transgenerational effects on progeny responses to blue and UVB radiation, and they differed between the accessions. These transgenerational effects could be adaptive by acclimation of slow and cumulative morphological change, and by early build-up of UV protection through flavonoid accumulation on UVB exposure. The differences between the two accessions aligned with their adaptation to contrasting UV environments.
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Affiliation(s)
- Yan Yan
- Viikki Plant Science Centre (ViPS), Department of Biosciences, 00014, University of Helsinki, Finland.
| | - Frederick L Stoddard
- Department of Agricultural Sciences, Viikki Plant Science Centre (ViPS) and Helsinki Sustainability Centre, 00014, University of Helsinki, Finland
| | - Susanne Neugart
- Leibniz-Institute of Vegetable and Ornamental Crops, Großbeeren, Germany
| | - Michal Oravec
- Global Change Research Institute CAS, Brno, Czech Republic
| | - Otmar Urban
- Global Change Research Institute CAS, Brno, Czech Republic
| | - Victor O Sadras
- South Australian Research and Development Institute, Adelaide, Australia; The University of Adelaide, School of Agriculture, Food and Wine, Australia
| | - Pedro J Aphalo
- Viikki Plant Science Centre (ViPS), Department of Biosciences, 00014, University of Helsinki, Finland
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15
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Functional Aspects of Early Light-Induced Protein (ELIP) Genes from the Desiccation-Tolerant Moss Syntrichia caninervis. Int J Mol Sci 2020; 21:ijms21041411. [PMID: 32093042 PMCID: PMC7073071 DOI: 10.3390/ijms21041411] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/11/2020] [Accepted: 02/14/2020] [Indexed: 11/17/2022] Open
Abstract
The early light-induced proteins (ELIPs) are postulated to act as transient pigment-binding proteins that protect the chloroplast from photodamage caused by excessive light energy. Desert mosses such as Syntrichia caninervis, that are desiccation-tolerant and homoiochlorophyllous, are often exposed to high-light conditions when both hydrated and dry ELIP transcripts are accumulated in response to dehydration. To gain further insights into ELIP gene function in the moss S. caninervis, two ELIP cDNAs cloned from S. caninervis, ScELIP1 and ScELIP2 and both sequences were used as the basis of a transcript abundance assessment in plants exposed to high-light, UV-A, UV-B, red-light, and blue-light. ScELIPs were expressed separately in an ArabidopsisELIP mutant Atelip. Transcript abundance for ScELIPs in gametophytes respond to each of the light treatments, in similar but not in identical ways. Ectopic expression of either ScELIPs protected PSII against photoinhibition and stabilized leaf chlorophyll content and thus partially complementing the loss of AtELIP2. Ectopic expression of ScELIPs also complements the germination phenotype of the mutant and improves protection of the photosynthetic apparatus of transgenic Arabidopsis from high-light stress. Our study extends knowledge of bryophyte photoprotection and provides further insight into the molecular mechanisms related to the function of ELIPs.
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Prudnikova ON, Rakitina TY, Karyagin VV, Rakitin VY. Adaptation to UV-B Radiation in the Ontogenesis of Arabidopsis thaliana Plants: The Participation of Ethylene, ABA, and Polyamines. Russ J Dev Biol 2019. [DOI: 10.1134/s1062360419050072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liu X, Wu X, Sun C, Rong J. Identification and Expression Profiling of the Regulator of Chromosome Condensation 1 (RCC1) Gene Family in Gossypium Hirsutum L. under Abiotic Stress and Hormone Treatments. Int J Mol Sci 2019; 20:E1727. [PMID: 30965557 PMCID: PMC6479978 DOI: 10.3390/ijms20071727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/29/2019] [Accepted: 04/04/2019] [Indexed: 12/17/2022] Open
Abstract
The regulator of chromosome condensation 1 (RCC1) is the nucleotide exchange factor for a GTPase called the Ras-related nuclear protein, and it is important for nucleo-plasmic transport, mitosis, nuclear membrane assembly, and control of chromatin agglutination during the S phase of mitosis in animals. In plants, RCC1 molecules act mainly as regulating factors for a series of downstream genes during biological processes such as the ultraviolet-B radiation (UV-B) response and cold tolerance. In this study, 56 genes were identified in upland cotton by searching the associated reference genomes. The genes were found to be unevenly distributed on 26 chromosomes, except A06, A12, D03, and D12. Phylogenetic analysis by maximum-likelihood revealed that the genes were divided into five subgroups. The RCC1 genes within the same group shared similar exon/intron patterns and conserved motifs in their encoded proteins. Most genes of the RCC1 family are expressed differently under various hormone treatments and are negatively controlled by salt stress. Gh_A05G3028 and Gh_D10G2310, which encode two proteins located in the nucleus, were strongly induced under salt treatment, while mutants of their homoeologous gene (UVR8) in Arabidopsis and VIGS (virus induced gene silencing) lines of the two genes above in G. hirsutum exhibited a salt-sensitive phenotype indicating their potential role in salt resistance in cotton. These results provide valuable reference data for further study of RCC1 genes in cotton.
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Affiliation(s)
- Xiao Liu
- The State Key Laboratory of Subtropical Silviculture, College of Forest and Biotechnology, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China.
| | - Xingchen Wu
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China.
| | - Chendong Sun
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China.
| | - Junkang Rong
- The State Key Laboratory of Subtropical Silviculture, College of Forest and Biotechnology, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China.
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Agriculture and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China.
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18
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Kumari S, Panigrahi KCS. Light and auxin signaling cross-talk programme root development in plants. J Biosci 2019; 44:26. [PMID: 30837377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Root development in plants is affected by light and phytohormones. Different ranges of light wavelength influence root patterning in a particular manner. Red and white light promote overall root development, whereas blue light has both positive as well as negative role in these processes. Light-mediated root development primarily occurs through modulation of synthesis, signaling and transport of the phytohormone auxin. Auxin has been shown to play a critical role in root development. It is being well-understood that components of light and auxin signaling cross-talk with each other. However, the signaling network that can modulate the root development is an intense area of research. Currently, limited information is available about the interaction of these two signaling pathways. This review not only summarizes the current findings on how different quality and quantity of light affect various aspects of root development but also present the role of auxin in these developmental aspects starting from lower to higher plants.
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Affiliation(s)
- Sony Kumari
- School of Biological Sciences, National Institute of Science Education and Research (NISER), HBNI, P.O. Bhimpur-Padanpur, Via Jatni, Dist. Khurda, Odisha 752 050, India
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19
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Tossi VE, Regalado JJ, Iannicelli J, Laino LE, Burrieza HP, Escandón AS, Pitta-Álvarez SI. Beyond Arabidopsis: Differential UV-B Response Mediated by UVR8 in Diverse Species. FRONTIERS IN PLANT SCIENCE 2019; 10:780. [PMID: 31275337 PMCID: PMC6591365 DOI: 10.3389/fpls.2019.00780] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 05/28/2019] [Indexed: 05/04/2023]
Abstract
Ultraviolet-B radiation (UV-B, 280-315 nm) is an important environmental signal that regulates growth and development in plants. Two dose-dependent UV-B response pathways were described in plants: a specific one, mediated by UVR8 (the specific UV-B receptor) and an unspecific one, activated by the oxidative damage produced by radiation. The constitutively expressed receptor appears inactive as a dimer, with the two monomers dissociating upon UV-B irradiation. The monomer then interacts with COP1, an ubiquitin ligase, hindering its ability to poly-ubiquitinate transcriptional factor HY5, thus averting its degradation and activating the photomorphogenic response. HY5 induces the synthesis of proteins RUP1 and RUP2, which interact with UVR8, releasing COP1, and inducing the re-dimerization of UVR8. This mechanism has been thoroughly characterized in Arabidopsis, where studies have demonstrated that the UVR8 receptor is key in UV-B response. Although Arabidopsis importance as a model plant many mechanisms described in this specie differ in other plants. In this paper, we review the latest information regarding UV-B response mediated by UVR8 in different species, focusing on the differences reported compared to Arabidopsis. For instance, UVR8 is not only induced by UV-B but also by other agents that are expressed differentially in diverse tissues. Also, in some of the species analyzed, proteins with low homology to RUP1 and RUP2 were detected. We also discuss how UVR8 is involved in other developmental and stress processes unrelated to UV-B. We conclude that the receptor is highly versatile, showing differences among species.
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Affiliation(s)
- Vanesa Eleonora Tossi
- Laboratorio de Cultivo Experimental de Plantas y Microalgas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Micología y Botánica, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jose Javier Regalado
- Laboratorio de Cultivo Experimental de Plantas y Microalgas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Micología y Botánica, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jesica Iannicelli
- Instituto de Genética “Ewald A. Favret,” Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
- CONICET-Consejo Nacional de Investigaciones Científicas y Tecnológicas, Buenos Aires, Argentina
| | - Leandro Ezequiel Laino
- Laboratorio de Cultivo Experimental de Plantas y Microalgas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Hernan Pablo Burrieza
- Laboratorio de biología del desarrollo de las plantas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Biodiversidad y Biología Experimental, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Alejandro Salvio Escandón
- Instituto de Genética “Ewald A. Favret,” Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
| | - Sandra Irene Pitta-Álvarez
- Laboratorio de Cultivo Experimental de Plantas y Microalgas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Micología y Botánica, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
- *Correspondence: Sandra Irene Pitta-Álvarez ;
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20
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Jenkins GI. Photomorphogenic responses to ultraviolet-B light. PLANT, CELL & ENVIRONMENT 2017; 40:2544-2557. [PMID: 28183154 DOI: 10.1111/pce.12934] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/03/2017] [Accepted: 02/04/2017] [Indexed: 05/18/2023]
Abstract
Exposure to ultraviolet B (UV-B) light regulates numerous aspects of plant metabolism, morphology and physiology through the differential expression of hundreds of genes. Photomorphogenic responses to UV-B are mediated by the photoreceptor UV RESISTANCE LOCUS8 (UVR8). Considerable progress has been made in understanding UVR8 action: the structural basis of photoreceptor function, how interaction with CONSTITUTIVELY PHOTOMORPHOGENIC 1 initiates signaling and how REPRESSOR OF UV-B PHOTOMORPHOGENESIS proteins negatively regulate UVR8 action. In addition, recent research shows that UVR8 mediates several responses through interaction with other signaling pathways, in particular auxin signaling. Nevertheless, many aspects of UVR8 action remain poorly understood. Most research to date has been undertaken with Arabidopsis, and it is important to explore the functions and regulation of UVR8 in diverse plant species. Furthermore, it is essential to understand how UVR8, and UV-B signaling in general, regulates processes under natural growth conditions. Ultraviolet B regulates the expression of many genes through UVR8-independent pathways, but the activity and importance of these pathways in plants growing in sunlight are poorly understood.
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Affiliation(s)
- Gareth I Jenkins
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, Bower Building, University of Glasgow, Glasgow, G12 8QQ, UK
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21
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Huang WY, Wu YC, Pu HY, Wang Y, Jang GJ, Wu SH. Plant dual-specificity tyrosine phosphorylation-regulated kinase optimizes light-regulated growth and development in Arabidopsis. PLANT, CELL & ENVIRONMENT 2017; 40:1735-1747. [PMID: 28437590 DOI: 10.1111/pce.12977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 06/07/2023]
Abstract
Light controls vegetative and reproductive development of plants. For a plant, sensing the light input properly ensures coordination with the ever-changing environment. Previously, we found that LIGHT-REGULATED WD1 (LWD1) and LWD2 regulate the circadian clock and photoperiodic flowering. Here, we identified Arabidopsis YET ANOTHER KINASE1 (AtYAK1), an evolutionarily conserved protein and a member of dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs), as an interacting protein of LWDs. Our study revealed that AtYAK1 is an important regulator for various light responses, including the circadian clock, photomorphogenesis and reproductive development. AtYAK1 could antagonize the function of LWDs in regulating the circadian clock and photoperiodic flowering. By examining phenotypes of atyak1, we found that AtYAK1 regulated light-induced period-length shortening and photomorphogenic development. Moreover, AtYAK1 mediated plant fertility especially under inferior light conditions including low light and short-day length. This study discloses a new regulator connecting environmental light to plant growth.
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Affiliation(s)
- Wen-Yu Huang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan
- Graduate Institute of Biotechnology and Department of Life Sciences, National Chung Hsing University, Taichung, 402, Taiwan
| | - Yi-Chen Wu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
| | - Hsin-Yi Pu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
| | - Ying Wang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
| | - Geng-Jen Jang
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
- Institute of Plant Biology, National Taiwan University, Taipei, 106, Taiwan
| | - Shu-Hsing Wu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan
- Graduate Institute of Biotechnology and Department of Life Sciences, National Chung Hsing University, Taichung, 402, Taiwan
- Biotechnology Center, National Chung Hsing University, Taichung, 402, Taiwan
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Gangappa SN, Botto JF. The Multifaceted Roles of HY5 in Plant Growth and Development. MOLECULAR PLANT 2016; 9:1353-1365. [PMID: 27435853 DOI: 10.1016/j.molp.2016.07.002] [Citation(s) in RCA: 345] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 06/27/2016] [Accepted: 07/08/2016] [Indexed: 05/18/2023]
Abstract
ELONGATED HYPOCOTYL5 (HY5), a member of the bZIP transcription factor family, inhibits hypocotyl growth and lateral root development, and promotes pigment accumulation in a light-dependent manner in Arabidopsis. Recent research on its role in different processes such as hormone, nutrient, abiotic stress (abscisic acid, salt, cold), and reactive oxygen species signaling pathways clearly places HY5 at the center of a transcriptional network hub. HY5 regulates the transcription of a large number of genes by directly binding to cis-regulatory elements. Recently, HY5 has also been shown to activate its own expression under both visible and UV-B light. Moreover, HY5 acts as a signal that moves from shoot to root to promote nitrate uptake and root growth. Here, we review recent advances on HY5 research in diverse aspects of plant development and highlight still open questions that need to be addressed in the near future for a complete understanding of its function in plant signaling and beyond.
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Affiliation(s)
- Sreeramaiah N Gangappa
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg 40530, Sweden.
| | - Javier F Botto
- IFEVA, UBA, CONICET, Facultad de Agronomía, Avenida San Martín 4453, C1417DSE Buenos Aires, Argentina.
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23
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Zhang J, Tian Y, Yan L, Zhang G, Wang X, Zeng Y, Zhang J, Ma X, Tan Y, Long N, Wang Y, Ma Y, He Y, Xue Y, Hao S, Yang S, Wang W, Zhang L, Dong Y, Chen W, Sheng J. Genome of Plant Maca (Lepidium meyenii) Illuminates Genomic Basis for High-Altitude Adaptation in the Central Andes. MOLECULAR PLANT 2016; 9:1066-77. [PMID: 27174404 DOI: 10.1016/j.molp.2016.04.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/01/2016] [Accepted: 04/26/2016] [Indexed: 05/20/2023]
Abstract
Maca (Lepidium meyenii Walp, 2n = 8x = 64), belonging to the Brassicaceae family, is an economic plant cultivated in the central Andes sierra in Peru (4000-4500 m). Considering that the rapid uplift of the central Andes occurred 5-10 million years ago (Ma), an evolutionary question arises regarding how plants such as maca acquire high-altitude adaptation within a short geological period. Here, we report the high-quality genome assembly of maca, in which two closely spaced maca-specific whole-genome duplications (WGDs; ∼6.7 Ma) were identified. Comparative genomic analysis between maca and closely related Brassicaceae species revealed expansions of maca genes and gene families involved in abiotic stress response, hormone signaling pathway, and secondary metabolite biosynthesis via WGDs. The retention and subsequent functional divergence of many duplicated genes may account for the morphological and physiological changes (i.e., small leaf shape and self-fertility) in maca in a high-altitude environment. In addition, some duplicated maca genes were identified with functions in morphological adaptation (i.e., LEAF CURLING RESPONSIVENESS) and abiotic stress response (i.e., GLYCINE-RICH RNA-BINDING PROTEINS and DNA-DAMAGE-REPAIR/TOLERATION 2) under positive selection. Collectively, the maca genome provides useful information to understand the important roles of WGDs in the high-altitude adaptation of plants in the Andes.
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Affiliation(s)
- Jing Zhang
- College of Life Science, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yang Tian
- College of Life Sciences, Jilin University, Changchun 130012, China; Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
| | - Liang Yan
- Pu'er Institute of Pu-erh Tea, Pu'er 665000, China
| | - Guanghui Zhang
- Yunnan Research Center on Good Agricultural Practice for Dominant Chinese Medicinal Materials, Yunnan Agricultural University, Kunming 650201, China
| | - Xiao Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zeng
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiajin Zhang
- School of Science and Information Engineering, Yunnan Agricultural University, Kunming 650201, China
| | - Xiao Ma
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
| | - Yuntao Tan
- College of Life Science, Kunming University of Science and Technology, Kunming 650504, China
| | - Ni Long
- College of Life Science, Kunming University of Science and Technology, Kunming 650504, China
| | - Yangzi Wang
- College of Life Science, Kunming University of Science and Technology, Kunming 650504, China
| | - Yujin Ma
- College of Life Science, Kunming University of Science and Technology, Kunming 650504, China
| | - Yuqi He
- Public Technical Service Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Yu Xue
- College of Life Science, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shumei Hao
- Yunnan University, Kunming 650091, China
| | - Shengchao Yang
- Yunnan Research Center on Good Agricultural Practice for Dominant Chinese Medicinal Materials, Yunnan Agricultural University, Kunming 650201, China
| | - Wen Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Liangsheng Zhang
- Center for Genomics and Biotechnology, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yang Dong
- College of Life Science, Kunming University of Science and Technology, Kunming 650504, China; Yunnan Research Institute for Local Plateau Agriculture and Industry, Kunming 650201, China.
| | - Wei Chen
- Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Yunnan Research Institute for Local Plateau Agriculture and Industry, Kunming 650201, China.
| | - Jun Sheng
- College of Life Sciences, Jilin University, Changchun 130012, China; Key Laboratory of Pu-erh Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Pu'er Institute of Pu-erh Tea, Pu'er 665000, China.
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Joubert C, Young PR, Eyéghé-Bickong HA, Vivier MA. Field-Grown Grapevine Berries Use Carotenoids and the Associated Xanthophyll Cycles to Acclimate to UV Exposure Differentially in High and Low Light (Shade) Conditions. FRONTIERS IN PLANT SCIENCE 2016; 7:786. [PMID: 27375645 PMCID: PMC4901986 DOI: 10.3389/fpls.2016.00786] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/22/2016] [Indexed: 05/21/2023]
Abstract
Light quantity and quality modulate grapevine development and influence berry metabolic processes. Here we studied light as an information signal for developing and ripening grape berries. A Vitis vinifera Sauvignon Blanc field experiment was used to identify the impacts of UVB on core metabolic processes in the berries under both high light (HL) and low light (LL) microclimates. The primary objective was therefore to identify UVB-specific responses on berry processes and metabolites and distinguish them from those responses elicited by variations in light incidence. Canopy manipulation at the bunch zone via early leaf removal, combined with UVB-excluding acrylic sheets installed over the bunch zones resulted in four bunch microclimates: (1) HL (control); (2) LL (control); (3) HL with UVB attenuation and (4) LL with UVB attenuation. Metabolite profiles of three berry developmental stages showed predictable changes to known UV-responsive compound classes in a typical UV acclimation (versus UV damage) response. Interestingly, the berries employed carotenoids and the associated xanthophyll cycles to acclimate to UV exposure and the berry responses differed between HL and LL conditions, particularly in the developmental stages where berries are still photosynthetically active. The developmental stage of the berries was an important factor to consider in interpreting the data. The green berries responded to the different exposure and/or UVB attenuation signals with metabolites that indicate that the berries actively managed its metabolism in relation to the exposure levels, displaying metabolic plasticity in the photosynthesis-related metabolites. Core processes such as photosynthesis, photo-inhibition and acclimation were maintained by differentially modulating metabolites under the four treatments. Ripe berries also responded metabolically to the light quality and quantity, but mostly formed compounds (volatiles and polyphenols) that have direct antioxidant and/or "sunscreening" abilities. The data presented for the green berries and those for the ripe berries conform to what is known for UVB and/or light stress in young, active leaves and older, senescing tissues respectively and provide scope for further evaluation of the sink/source status of fruits in relation to photosignalling and/or stress management.
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Affiliation(s)
- Chandré Joubert
- Department of Viticulture and Oenology, Stellenbosch UniversityStellenbosch, South Africa
| | - Philip R. Young
- Department of Viticulture and Oenology, Stellenbosch UniversityStellenbosch, South Africa
- Institute for Wine Biotechnology, Stellenbosch UniversityStellenbosch, South Africa
| | - Hans A. Eyéghé-Bickong
- Department of Viticulture and Oenology, Stellenbosch UniversityStellenbosch, South Africa
- Institute for Wine Biotechnology, Stellenbosch UniversityStellenbosch, South Africa
| | - Melané A. Vivier
- Department of Viticulture and Oenology, Stellenbosch UniversityStellenbosch, South Africa
- Institute for Wine Biotechnology, Stellenbosch UniversityStellenbosch, South Africa
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25
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Tilbrook K, Dubois M, Crocco CD, Yin R, Chappuis R, Allorent G, Schmid-Siegert E, Goldschmidt-Clermont M, Ulm R. UV-B Perception and Acclimation in Chlamydomonas reinhardtii. THE PLANT CELL 2016; 28:966-83. [PMID: 27020958 PMCID: PMC4863380 DOI: 10.1105/tpc.15.00287] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 03/25/2016] [Indexed: 05/03/2023]
Abstract
Plants perceive UV-B, an intrinsic component of sunlight, via a signaling pathway that is mediated by the photoreceptor UV RESISTANCE LOCUS8 (UVR8) and induces UV-B acclimation. To test whether similar UV-B perception mechanisms exist in the evolutionarily distant green alga Chlamydomonas reinhardtii, we identified Chlamydomonas orthologs of UVR8 and the key signaling factor CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1). Cr-UVR8 shares sequence and structural similarity to Arabidopsis thaliana UVR8, has conserved tryptophan residues for UV-B photoreception, monomerizes upon UV-B exposure, and interacts with Cr-COP1 in a UV-B-dependent manner. Moreover, Cr-UVR8 can interact with At-COP1 and complement the Arabidopsis uvr8 mutant, demonstrating that it is a functional UV-B photoreceptor. Chlamydomonas shows apparent UV-B acclimation in colony survival and photosynthetic efficiency assays. UV-B exposure, at low levels that induce acclimation, led to broad changes in the Chlamydomonas transcriptome, including in genes related to photosynthesis. Impaired UV-B-induced activation in the Cr-COP1 mutant hit1 indicates that UVR8-COP1 signaling induces transcriptome changes in response to UV-B. Also, hit1 mutants are impaired in UV-B acclimation. Chlamydomonas UV-B acclimation preserved the photosystem II core proteins D1 and D2 under UV-B stress, which mitigated UV-B-induced photoinhibition. These findings highlight the early evolution of UVR8 photoreceptor signaling in the green lineage to induce UV-B acclimation and protection.
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Affiliation(s)
- Kimberley Tilbrook
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Marine Dubois
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Carlos D Crocco
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Ruohe Yin
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Richard Chappuis
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Guillaume Allorent
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Emanuel Schmid-Siegert
- SIB-Swiss Institute of Bioinformatics, University of Lausanne, CH-1015 Lausanne, Switzerland
| | - Michel Goldschmidt-Clermont
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, CH-1211 Geneva 4, Switzerland
| | - Roman Ulm
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, CH-1211 Geneva 4, Switzerland
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26
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Binkert M, Crocco CD, Ekundayo B, Lau K, Raffelberg S, Tilbrook K, Yin R, Chappuis R, Schalch T, Ulm R. Revisiting chromatin binding of the Arabidopsis UV-B photoreceptor UVR8. BMC PLANT BIOLOGY 2016; 16:42. [PMID: 26864020 PMCID: PMC4750278 DOI: 10.1186/s12870-016-0732-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/06/2016] [Indexed: 05/05/2023]
Abstract
BACKGROUND Plants perceive UV-B through the UV RESISTANCE LOCUS 8 (UVR8) photoreceptor and UVR8 activation leads to changes in gene expression such as those associated with UV-B acclimation and stress tolerance. Albeit functionally unrelated, UVR8 shows some homology with RCC1 (Regulator of Chromatin Condensation 1) proteins from non-plant organisms at the sequence level. These proteins act as guanine nucleotide exchange factors for Ran GTPases and bind chromatin via histones. Subsequent to the revelation of this sequence homology, evidence was presented showing that UVR8 activity involves interaction with chromatin at the loci of some target genes through histone binding. This suggested a UVR8 mode-of-action intimately and directly linked with gene transcription. However, several aspects of UVR8 chromatin association remained undefined, namely the impact of UV-B on the process and how UVR8 chromatin association related to the transcription factor ELONGATED HYPOCOTYL 5 (HY5), which is important for UV-B signalling and has overlapping chromatin targets. Therefore, we have investigated UVR8 chromatin association in further detail. RESULTS Unlike the claims of previous studies, our chromatin immunoprecipitation (ChIP) experiments do not confirm UVR8 chromatin association. In contrast to human RCC1, recombinant UVR8 also does not bind nucleosomes in vitro. Moreover, fusion of a VP16 activation domain to UVR8 did not alter expression of proposed UVR8 target genes in transient gene expression assays. Finally, comparison of the Drosophila DmRCC1 and the Arabidopsis UVR8 crystal structures revealed that critical histone- and DNA-interaction residues apparent in DmRCC1 are not conserved in UVR8. CONCLUSION This has led us to conclude that the cellular activity of UVR8 likely does not involve its specific binding to chromatin at target genes.
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Affiliation(s)
- Melanie Binkert
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Carlos D Crocco
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Babatunde Ekundayo
- Department of Molecular Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Kelvin Lau
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Sarah Raffelberg
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Kimberley Tilbrook
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
- Present Address: CSIRO Agriculture, Canberra, Australia.
| | - Ruohe Yin
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Richard Chappuis
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
| | - Thomas Schalch
- Department of Molecular Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
- Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, CH-1211, Geneva 4, Switzerland.
| | - Roman Ulm
- Department of Botany and Plant Biology, University of Geneva, Sciences III, 30 Quai E. Ansermet, CH-1211, Geneva 4, Switzerland.
- Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, CH-1211, Geneva 4, Switzerland.
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27
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Changing scenario in plant UV-B research:UV-B from a generic stressor to a specific regulator. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:334-43. [DOI: 10.1016/j.jphotobiol.2015.10.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 10/08/2015] [Accepted: 10/11/2015] [Indexed: 11/15/2022]
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28
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Hayami N, Sakai Y, Kimura M, Saito T, Tokizawa M, Iuchi S, Kurihara Y, Matsui M, Nomoto M, Tada Y, Yamamoto YY. The Responses of Arabidopsis Early Light-Induced Protein2 to Ultraviolet B, High Light, and Cold Stress Are Regulated by a Transcriptional Regulatory Unit Composed of Two Elements. PLANT PHYSIOLOGY 2015; 169:840-55. [PMID: 26175515 PMCID: PMC4577391 DOI: 10.1104/pp.15.00398] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 07/13/2015] [Indexed: 05/05/2023]
Abstract
The Arabidopsis (Arabidopsis thaliana) Early Light-Induced Protein (ELIP) is thought to act as a photoprotectant, reducing the damaging effects of high light (HL). Expression of ELIP2 is activated by multiple environmental stresses related to photoinhibition. We have identified putative regulatory elements in an ELIP2 promoter using an octamer-based frequency comparison method, analyzed the role of these elements using synthetic promoters, and revealed a key transcriptional regulatory unit for ultraviolet B (UV-B) radiation, HL, and cold stress responses. The unit is composed of two elements, designated as Elements A (TACACACC) and B (GGCCACGCCA), and shows functionality only when paired. Our genome-wide correlation analysis between possession of these elements in the promoter region and expression profiles in response to UV-B, HL, and cold suggests that Element B receives and integrates these multiple stress signals. In vitro protein-DNA binding assays revealed that LONG HYPOCOTYL5 (HY5), a basic domain-Leucine zipper transcription factor, directly binds to Element B. In addition, mutant analysis of HY5 showed partial involvement in the UV-B and HL responses but not in the cold stress response. These results suggest that signals for UV-B, HL, and cold stress join at Element B, which recognizes the signals of multiple transcription factors, including HY5.
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Affiliation(s)
- Natsuki Hayami
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Yusaku Sakai
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Mitsuhiro Kimura
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Tatsunori Saito
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Mutsutomo Tokizawa
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Satoshi Iuchi
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Yukio Kurihara
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Minami Matsui
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Mika Nomoto
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Yasuomi Tada
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
| | - Yoshiharu Y Yamamoto
- Faculty of Applied Biological Sciences (N.H., Y.S., T.S., Y.Y.Y.) and United Graduate School of Agricultural Science (M.T., Y.Y.Y.), Gifu University, Gifu 501-1103, Japan; Department of Frontier Research, Kazusa DNA Research Institute, Kazusa-kamatari 2-6-7, Kisarazu, Chiba 292-0818, Japan (M.K.);RIKEN Bioresource Center, Koyadai 3-1-1, Tsukuba, Ibaraki 305-0074, Japan (S.I.);RIKEN Center for Sustainable Resource Science, Suehiro-cho 1-7-22, Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan (Y.K., M.M., Y.Y.Y.); andCenter for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan (M.N., Y.T.)
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29
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Abstract
Plants are able to sense UV-B through the UV-B photoreceptor UVR8. UV-B photon absorption by a UVR8 homodimer leads to UVR8 monomerization and interaction with the downstream signaling factor COP1. This then initiates changes in gene expression, which lead to several metabolic and morphological alterations. A major response is the activation of mechanisms associated with UV-B acclimation and UV-B tolerance, including biosynthesis of sunscreen metabolites, antioxidants and DNA repair enzymes. To balance the response, UVR8 is inactivated by regulated re-dimerization. Apart from their importance for plants, UVR8 and its interacting protein COP1 have already proved useful for the optogenetic toolkit used to engineer synthetic light-dependent responses.
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Affiliation(s)
- Roman Ulm
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211, Geneva, 4, Switzerland.
| | - Gareth I Jenkins
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
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30
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Zakhvataev VE. Tidal variations of radon activity as a possible factor synchronizing biological processes. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915010273] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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31
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Žádníková P, Smet D, Zhu Q, Straeten DVD, Benková E. Strategies of seedlings to overcome their sessile nature: auxin in mobility control. FRONTIERS IN PLANT SCIENCE 2015; 6:218. [PMID: 25926839 PMCID: PMC4396199 DOI: 10.3389/fpls.2015.00218] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 03/19/2015] [Indexed: 05/21/2023]
Abstract
Plants are sessile organisms that are permanently restricted to their site of germination. To compensate for their lack of mobility, plants evolved unique mechanisms enabling them to rapidly react to ever changing environmental conditions and flexibly adapt their postembryonic developmental program. A prominent demonstration of this developmental plasticity is their ability to bend organs in order to reach the position most optimal for growth and utilization of light, nutrients, and other resources. Shortly after germination, dicotyledonous seedlings form a bended structure, the so-called apical hook, to protect the delicate shoot meristem and cotyledons from damage when penetrating through the soil. Upon perception of a light stimulus, the apical hook rapidly opens and the photomorphogenic developmental program is activated. After germination, plant organs are able to align their growth with the light source and adopt the most favorable orientation through bending, in a process named phototropism. On the other hand, when roots and shoots are diverted from their upright orientation, they immediately detect a change in the gravity vector and bend to maintain a vertical growth direction. Noteworthy, despite the diversity of external stimuli perceived by different plant organs, all plant tropic movements share a common mechanistic basis: differential cell growth. In our review, we will discuss the molecular principles underlying various tropic responses with the focus on mechanisms mediating the perception of external signals, transduction cascades and downstream responses that regulate differential cell growth and consequently, organ bending. In particular, we highlight common and specific features of regulatory pathways in control of the bending of organs and a role for the plant hormone auxin as a key regulatory component.
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Affiliation(s)
- Petra Žádníková
- Department of Plant Systems Biology, Flanders Institute for Biotechnology, GhentBelgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, GhentBelgium
| | - Dajo Smet
- Department of Physiology, Laboratory of Functional Plant Biology, Ghent University, GhentBelgium
| | - Qiang Zhu
- Institute of Science and Technology Austria, KlosterneuburgAustria
| | | | - Eva Benková
- Institute of Science and Technology Austria, KlosterneuburgAustria
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32
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Yin R, Arongaus AB, Binkert M, Ulm R. Two distinct domains of the UVR8 photoreceptor interact with COP1 to initiate UV-B signaling in Arabidopsis. THE PLANT CELL 2015; 27:202-13. [PMID: 25627067 PMCID: PMC4330580 DOI: 10.1105/tpc.114.133868] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/23/2014] [Accepted: 01/09/2015] [Indexed: 05/17/2023]
Abstract
UV-B photon reception by the Arabidopsis thaliana homodimeric UV RESISTANCE LOCUS8 (UVR8) photoreceptor leads to its monomerization and a crucial interaction with CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1). Relay of the subsequent signal regulates UV-B-induced photomorphogenesis and stress acclimation. Here, we report that two separate domains of UVR8 interact with COP1: the β-propeller domain of UVR8 mediates UV-B-dependent interaction with the WD40 repeats-based predicted β-propeller domain of COP1, whereas COP1 activity is regulated by interaction through the UVR8 C-terminal C27 domain. We show not only that the C27 domain is required for UVR8 activity but also that chemically induced expression of the C27 domain is sufficient to mimic UV-B signaling. We further show, in contrast with COP1, that the WD40 repeat proteins REPRESSOR OF UV-B PHOTOMORPHOGENESIS1 (RUP1) and RUP2 interact only with the UVR8 C27 domain. This coincides with their facilitation of UVR8 reversion to the ground state by redimerization and their potential to interact with UVR8 in a UV-B-independent manner. Collectively, our results provide insight into a key mechanism of photoreceptor-mediated signaling and its negative feedback regulation.
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Affiliation(s)
- Ruohe Yin
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Adriana B Arongaus
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Melanie Binkert
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - Roman Ulm
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
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33
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Structure and function of the UV-B photoreceptor UVR8. Curr Opin Struct Biol 2014; 29:52-7. [DOI: 10.1016/j.sbi.2014.09.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 09/01/2014] [Accepted: 09/11/2014] [Indexed: 11/18/2022]
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34
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Takeuchi T, Newton L, Burkhardt A, Mason S, Farré EM. Light and the circadian clock mediate time-specific changes in sensitivity to UV-B stress under light/dark cycles. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:6003-12. [PMID: 25147271 PMCID: PMC4203133 DOI: 10.1093/jxb/eru339] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In Arabidopsis, the circadian clock regulates UV-B-mediated changes in gene expression. Here it is shown that circadian clock components are able to inhibit UV-B-induced gene expression in a gene-by-gene-specific manner and act downstream of the initial UV-B sensing by COP1 (CONSTITUTIVE PHOTOMORPHOGENIC 1) and UVR8 (UV RESISTANCE LOCUS 8). For example, the UV-B induction of ELIP1 (EARLY LIGHT INDUCIBLE PROTEIN 1) and PRR9 (PSEUDO-RESPONSE REGULATOR 9) is directly regulated by LUX (LUX ARRYTHMO), ELF4 (EARLY FLOWERING 4), and ELF3. Moreover, time-dependent changes in plant sensitivity to UV-B damage were observed. Wild-type Arabidopsis plants, but not circadian clock mutants, were more sensitive to UV-B treatment during the night periods than during the light periods under diel cycles. Experiments performed under short cycles of 6h light and 6h darkness showed that the increased stress sensitivity of plants to UV-B in the dark only occurred during the subjective night and not during the subjective day in wild-type seedlings. In contrast, the stress sensitivity of Arabidopsis mutants with a compromised circadian clock was still influenced by the light condition during the subjective day. Taken together, the results show that the clock and light modulate plant sensitivity to UV-B stress at different times of the day.
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Affiliation(s)
- Tomomi Takeuchi
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Linsey Newton
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Alyssa Burkhardt
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Saundra Mason
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Eva M Farré
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824, USA
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35
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Binkert M, Kozma-Bognár L, Terecskei K, De Veylder L, Nagy F, Ulm R. UV-B-responsive association of the Arabidopsis bZIP transcription factor ELONGATED HYPOCOTYL5 with target genes, including its own promoter. THE PLANT CELL 2014; 26:4200-13. [PMID: 25351492 PMCID: PMC4247584 DOI: 10.1105/tpc.114.130716] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 09/18/2014] [Accepted: 10/13/2014] [Indexed: 05/18/2023]
Abstract
In plants subjected to UV-B radiation, responses are activated that minimize damage caused by UV-B. The bZIP transcription factor ELONGATED HYPOCOTYL5 (HY5) acts downstream of the UV-B photoreceptor UV RESISTANCE LOCUS8 (UVR8) and promotes UV-B-induced photomorphogenesis and acclimation. Expression of HY5 is induced by UV-B; however, the transcription factor(s) that regulate HY5 transcription in response to UV-B and the impact of UV-B on the association of HY5 with its target promoters are currently unclear. Here, we show that HY5 binding to the promoters of UV-B-responsive genes is enhanced by UV-B in a UVR8-dependent manner in Arabidopsis thaliana. In agreement, overexpression of REPRESSOR OF UV-B PHOTOMORPHOGENESIS2, a negative regulator of UVR8 function, blocks UV-B-responsive HY5 enrichment at target promoters. Moreover, we have identified a T/G-box in the HY5 promoter that is required for its UV-B responsiveness. We show that HY5 and its homolog HYH bind to the T/G(HY5)-box cis-acting element and that they act redundantly in the induction of HY5 expression upon UV-B exposure. Therefore, HY5 is enriched at target promoters in response to UV-B in a UVR8 photoreceptor-dependent manner, and HY5 and HYH interact directly with a T/G-box cis-acting element of the HY5 promoter, mediating the transcriptional activation of HY5 in response to UV-B.
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Affiliation(s)
- Melanie Binkert
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
| | - László Kozma-Bognár
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, H-6726 Szeged, Hungary
| | - Kata Terecskei
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, H-6726 Szeged, Hungary
| | - Lieven De Veylder
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Ferenc Nagy
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, H-6726 Szeged, Hungary School of Biological Sciences, University of Edinburgh, EH9 3JR Edinburgh, United Kingdom
| | - Roman Ulm
- Department of Botany and Plant Biology, University of Geneva, Sciences III, CH-1211 Geneva 4, Switzerland
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36
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Müller-Xing R, Xing Q, Goodrich J. Footprints of the sun: memory of UV and light stress in plants. FRONTIERS IN PLANT SCIENCE 2014; 5:474. [PMID: 25278950 PMCID: PMC4165212 DOI: 10.3389/fpls.2014.00474] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 08/28/2014] [Indexed: 05/18/2023]
Abstract
Sunlight provides the necessary energy for plant growth via photosynthesis but high light and particular its integral ultraviolet (UV) part causes stress potentially leading to serious damage to DNA, proteins, and other cellular components. Plants show adaptation to environmental stresses, sometimes referred to as "plant memory." There is growing evidence that plants memorize exposure to biotic or abiotic stresses through epigenetic mechanisms at the cellular level. UV target genes such as CHALCONE SYNTHASE (CHS) respond immediately to UV treatment and studies of the recently identified UV-B receptor UV RESISTANCE LOCUS 8 (UVR8) confirm the expedite nature of UV signaling. Considering these findings, an UV memory seems redundant. However, several lines of evidence suggest that plants may develop an epigenetic memory of UV and light stress, but in comparison to other abiotic stresses there has been relatively little investigation. Here we summarize the state of knowledge about acclimation and adaptation of plants to UV light and discuss the possibility of chromatin based epigenetic memory.
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Affiliation(s)
- Ralf Müller-Xing
- Institute of Genetics, Heinrich-Heine-UniversityDüsseldorf, Germany
| | - Qian Xing
- Institute of Genetics, Heinrich-Heine-UniversityDüsseldorf, Germany
| | - Justin Goodrich
- Institute for Molecular Plant Sciences, The University of EdinburghEdinburgh, UK
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37
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Ge XM, Zhu Y, He JM. Cytosolic alkalisation and nitric oxide production in UVB-induced stomatal closure in Arabidopsis thaliana. FUNCTIONAL PLANT BIOLOGY : FPB 2014; 41:803-811. [PMID: 32481034 DOI: 10.1071/fp13222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 03/27/2014] [Indexed: 06/11/2023]
Abstract
The role and the interrelationship of cytosolic alkalisation and nitric oxide (NO) in UVB-induced stomatal closure were investigated in Arabidopsis thaliana (L.) Heynh. by stomatal bioassay and laser-scanning confocal microscopy. In response to 0.5Wm-2 UVB radiation, the rise of NO levels in guard cells occurred after cytosolic alkalisation but preceded stomatal closure. UVB-induced NO production and stomatal closure were both inhibited by NO scavengers, nitrate reductase (NR) inhibitors and a Nia2-5/Nia1-2 mutation, and also by butyrate. Methylamine induced NO generation and stomatal closure in the wild-type but not in the Nia2-5/Nia1-2 mutant or wild-type plants pretreated with NO scavengers or NR inhibitors while enhancing the cytosolic pH in guard cells under light. NO generation in wild-type guard cells was largely induced after 60min of UVB radiation. The defect in UVB-induced NO generation in Nia2-5/Nia1-2 guard cells did not affect the changes of guard cell pH before 60min of UVB radiation, but prevented the UVB-induced cytosolic alkalisation after 60min of radiation. Meanwhile, exogenous NO caused a marked rise of cytosolic pH in guard cells. Together, our results show that cytosolic alkalisation and NR-dependent NO production coordinately function in UVB signalling in A. thaliana guard cells.
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Affiliation(s)
- Xiao-Min Ge
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, People's Republic of China
| | - Yan Zhu
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, People's Republic of China
| | - Jun-Min He
- School of Life Sciences, Shaanxi Normal University, Xi'an 710062, People's Republic of China
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38
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Kataria S, Jajoo A, Guruprasad KN. Impact of increasing Ultraviolet-B (UV-B) radiation on photosynthetic processes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 137:55-66. [PMID: 24725638 DOI: 10.1016/j.jphotobiol.2014.02.004] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 02/01/2014] [Accepted: 02/07/2014] [Indexed: 12/14/2022]
Abstract
Increased UV-B radiation on the earth's surface due to depletion of stratospheric ozone layer is one of the changes of current climate-change pattern. The deleterious effects of UV-B radiation on photosynthesis and photosynthetic productivity of plants are reviewed. Perusal of relevant literature reveals that UV-B radiation inflicts damage to the photosynthetic apparatus of green plants at multiple sites. The sites of damage include oxygen evolving complex, D1/D2 reaction center proteins and other components on the donor and acceptor sides of PS II. The radiation inactivates light harvesting complex II and alters gene expression for synthesis of PS II reaction center proteins. Mn cluster of water oxidation complex is the most important primary target of UV-B stress whereas D1 and D2 proteins, quinone molecules and cytochrome b are the subsequent targets of UV-B. In addition, photosynthetic carbon reduction is also sensitive to UV-B radiation which has a direct effect on the activity and content of Rubisco. Some indirect effects of UV-B radiation include changes in photosynthetic pigments, stomatal conductance and leaf and canopy morphology. The failure of protective mechanisms makes PS II further vulnerable to the UV-B radiation. Reactive oxygen species are involved in UV-B induced responses in plants, both as signaling and damaging agents. Exclusion of ambient UV components under field conditions results in the enhancement of the rate of photosynthesis, PS II efficiency and subsequently increases the biomass accumulation and crop yield. It is concluded that predicted future increase in UV-B irradiation will have significant impact on the photosynthetic efficiency and the productivity of higher plants.
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Affiliation(s)
- Sunita Kataria
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India.
| | - Anjana Jajoo
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India
| | - Kadur N Guruprasad
- School of Life Science, Devi Ahilya University, Khandwa Road, Indore 452001, India
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39
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Müller-Xing R, Xing Q, Goodrich J. Footprints of the sun: memory of UV and light stress in plants. FRONTIERS IN PLANT SCIENCE 2014. [PMID: 25278950 DOI: 10.3389/fpls.2014.00474/abstract] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Sunlight provides the necessary energy for plant growth via photosynthesis but high light and particular its integral ultraviolet (UV) part causes stress potentially leading to serious damage to DNA, proteins, and other cellular components. Plants show adaptation to environmental stresses, sometimes referred to as "plant memory." There is growing evidence that plants memorize exposure to biotic or abiotic stresses through epigenetic mechanisms at the cellular level. UV target genes such as CHALCONE SYNTHASE (CHS) respond immediately to UV treatment and studies of the recently identified UV-B receptor UV RESISTANCE LOCUS 8 (UVR8) confirm the expedite nature of UV signaling. Considering these findings, an UV memory seems redundant. However, several lines of evidence suggest that plants may develop an epigenetic memory of UV and light stress, but in comparison to other abiotic stresses there has been relatively little investigation. Here we summarize the state of knowledge about acclimation and adaptation of plants to UV light and discuss the possibility of chromatin based epigenetic memory.
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Affiliation(s)
- Ralf Müller-Xing
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Germany
| | - Qian Xing
- Institute of Genetics, Heinrich-Heine-University Düsseldorf, Germany
| | - Justin Goodrich
- Institute for Molecular Plant Sciences, The University of Edinburgh Edinburgh, UK
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40
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Jenkins GI. The UV-B photoreceptor UVR8: from structure to physiology. THE PLANT CELL 2014; 26:21-37. [PMID: 24481075 PMCID: PMC3963570 DOI: 10.1105/tpc.113.119446] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 10/08/2013] [Accepted: 01/06/2014] [Indexed: 05/18/2023]
Abstract
Low doses of UV-B light (280 to 315 nm) elicit photomorphogenic responses in plants that modify biochemical composition, photosynthetic competence, morphogenesis, and defense. UV RESISTANCE LOCUS8 (UVR8) mediates photomorphogenic responses to UV-B by regulating transcription of a set of target genes. UVR8 differs from other known photoreceptors in that it uses specific Trp amino acids instead of a prosthetic chromophore for light absorption during UV-B photoreception. Absorption of UV-B dissociates the UVR8 dimer into monomers, initiating signal transduction through interaction with CONSTITUTIVELY PHOTOMORPHOGENIC1. However, much remains to be learned about the physiological role of UVR8 and its interaction with other signaling pathways, the molecular mechanism of UVR8 photoreception, how the UVR8 protein initiates signaling, how it is regulated, and how UVR8 regulates transcription of its target genes.
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Affiliation(s)
- Gareth I. Jenkins
- Institute of Molecular, Cell, and Systems Biology, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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41
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Abstract
Arabidopsis thaliana UV RESISTANCE LOCUS 8 (UVR8) is a UV-B photoreceptor that initiates photomorphogenic responses underlying acclimation and UV-B tolerance in plants. UVR8 is a homodimer in its ground state, and UV-B exposure results in its instantaneous monomerization followed by interaction with CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1), a major factor in UV-B signaling. UV-B photoreception by UVR8 is based on intrinsic tryptophan aromatic amino acid residues, with tryptophan-285 as the main chromophore. We generated transgenic plants expressing UVR8 with a single amino acid change of tryptophan-285 to alanine. UVR8(W285A) appears monomeric and shows UV-B-independent interaction with COP1. Phenotypically, the plants expressing UVR8(W285A) exhibit constitutive photomorphogenesis associated with constitutive activation of target genes, elevated levels of anthocyanins, and enhanced, acclimation-independent UV-B tolerance. Moreover, we have identified COP1, REPRESSOR OF UV-B PHOTOMORPHOGENESIS 1 and 2 (RUP1 and RUP2), and the SUPPRESSOR OF PHYA-105 (SPA) family as proteins copurifying with UVR8(W285A). Whereas COP1, RUP1, and RUP2 are known to directly interact with UVR8, we show that SPA1 interacts with UVR8 indirectly through COP1. We conclude that UVR8(W285A) is a constitutively active UVR8 photoreceptor variant in Arabidopsis, as is consistent with the crucial importance of monomer formation and COP1 binding for UVR8 activity.
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