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Kong J, Zhao Y, Fan P, Wang Y, Xu X, Wang L, Li S, Duan W, Liang Z, Dai Z. Far-red light modulates grapevine growth by increasing leaf photosynthesis efficiency and triggering organ-specific transcriptome remodelling : Author. BMC PLANT BIOLOGY 2024; 24:189. [PMID: 38486149 PMCID: PMC10941557 DOI: 10.1186/s12870-024-04870-7] [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: 05/15/2023] [Accepted: 02/28/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Growing evidence demonstrates that the synergistic interaction of far-red light with shorter wavelength lights could evidently improve the photosynthesis efficiency of multiple species. However, whether/how far-red light affects sink organs and consequently modulates the source‒sink relationships are largely unknown. RESULTS Here, equal intensities of white and far-red lights were added to natural light for grape plantlets to investigate the effects of far-red light supplementation on grapevine growth and carbon assimilate allocation, as well as to reveal the underlying mechanisms, through physiological and transcriptomic analysis. The results showed that additional far-red light increased stem length and carbohydrate contents in multiple organs and decreased leaf area, specific leaf weight and dry weight of leaves in comparison with their counterparts grown under white light. Compared to white light, the maximum net photosynthetic rate of the leaves was increased by 31.72% by far-red light supplementation, indicating that far-red light indeed elevated the photosynthesis efficiency of grapes. Transcriptome analysis revealed that leaves were most responsive to far-red light, followed by sink organs, including stems and roots. Genes related to light signaling and carbon metabolites were tightly correlated with variations in the aforementioned physiological traits. In particular, VvLHCB1 is involved in light harvesting and restoring the balance of photosystem I and photosystem II excitation, and VvCOP1 and VvPIF3, which regulate light signal transduction, were upregulated under far-red conditions. In addition, the transcript abundances of the sugar transporter-encoding genes VvSWEET1 and VvSWEET3 and the carbon metabolite-encoding genes VvG6PD, VvSUS7 and VvPGAM varied in line with the change in sugar content. CONCLUSIONS This study showed that far-red light synergistically functioning with white light has a beneficial effect on grape photosystem activity and is able to differentially affect the growth of sink organs, providing evidence for the possible addition of far-red light to the wavelength range of photosynthetically active radiation (PAR).
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Affiliation(s)
- Junhua Kong
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Yan Zhao
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Peige Fan
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Yongjian Wang
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Xiaobo Xu
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Lijun Wang
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Shaohua Li
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Wei Duan
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- China National Botanical Garden, Beijing, 100093, China
| | - Zhenchang Liang
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Zhanwu Dai
- State Key Laboratory of Plant Diversity and Specialty Crops, Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
- China National Botanical Garden, Beijing, 100093, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Ojha M, Verma D, Chakraborty N, Pal A, Bhagat PK, Singh A, Verma N, Sinha AK, Chattopadhyay S. MKKK20 works as an upstream triple-kinase of MKK3-MPK6-MYC2 module in Arabidopsis seedling development. iScience 2023; 26:106049. [PMID: 36818282 PMCID: PMC9929681 DOI: 10.1016/j.isci.2023.106049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/29/2022] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
The mitogen-activated protein kinase (MAPK) cascade is involved in several signal transduction processes in eukaryotes. Here, we report a mechanistic function of MAP kinase kinase kinase 20 (MKKK20) in light signal transduction pathways. We show that MKKK20 acts as a negative regulator of photomorphogenic growth at various wavelengths of light. MKKK20 not only regulates the expression of light signaling pathway regulatory genes but also gets regulated by the same pathway genes. The atmyc2 mkkk20 double mutant analysis shows that MYC2 works downstream to MKKK20 in the regulation of photomorphogenic growth. MYC2 directly binds to the promoter of MKKK20 to modulate its expression. The protein-protein interaction study indicates that MKKK20 physically interacts with MYC2, and this interaction likely suppresses the MYC2-mediated promotion of MKKK20 expression. Further, the protein phosphorylation studies demonstrate that MKKK20 works as the upstream kinase of MKK3-MPK6-MYC2 module in photomorphogenesis.
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Affiliation(s)
- Madhusmita Ojha
- Department of Biotechnology, National Institute of Technology, Durgapur 713209, India
| | - Deepanjali Verma
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Nibedita Chakraborty
- Department of Biotechnology, National Institute of Technology, Durgapur 713209, India
| | - Abhideep Pal
- Department of Biotechnology, National Institute of Technology, Durgapur 713209, India
| | - Prakash Kumar Bhagat
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Anshuman Singh
- Department of Biotechnology, National Institute of Technology, Durgapur 713209, India
| | - Neetu Verma
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Alok Krishna Sinha
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India,Corresponding author
| | - Sudip Chattopadhyay
- Department of Biotechnology, National Institute of Technology, Durgapur 713209, India
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Genome-Wide Identification and Salt Stress Response Analysis of the bZIP Transcription Factor Family in Sugar Beet. Int J Mol Sci 2022; 23:ijms231911573. [PMID: 36232881 PMCID: PMC9569505 DOI: 10.3390/ijms231911573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/16/2022] [Accepted: 09/21/2022] [Indexed: 12/04/2022] Open
Abstract
As one of the largest transcription factor families in plants, bZIP transcription factors play important regulatory roles in different biological processes, especially in the process of stress response. Salt stress inhibits the growth and yield of sugar beet. However, bZIP-related studies in sugar beet (Beta vulgaris L.) have not been reported. This study aimed to identify the bZIP transcription factors in sugar beet and analyze their biological functions and response patterns to salt stress. Using bioinformatics, 48 BvbZIP genes were identified in the genome of sugar beet, encoding 77 proteins with large structural differences. Collinearity analysis showed that three pairs of BvbZIP genes were fragment replication genes. The BvbZIP genes were grouped according to the phylogenetic tree topology and conserved structures, and the results are consistent with those reported in Arabidopsis. Under salt stress, the expression levels of most BvbZIP genes were decreased, and only eight genes were up-regulated. GO analysis showed that the BvbZIP genes were mainly negatively regulated in stress response. Protein interaction prediction showed that the BvbZIP genes were mainly involved in light signaling and ABA signal transduction, and also played a certain role in stress responses. In this study, the structures and biological functions of the BvbZIP genes were analyzed to provide foundational data for further mechanistic studies and for facilitating the efforts toward the molecular breeding of stress-resilient sugar beet.
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4
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Srivastava M, Srivastava AK, Roy D, Mansi M, Gough C, Bhagat PK, Zhang C, Sadanandom A. The conjugation of SUMO to the transcription factor MYC2 functions in blue light-mediated seedling development in Arabidopsis. THE PLANT CELL 2022; 34:2892-2906. [PMID: 35567527 PMCID: PMC9338799 DOI: 10.1093/plcell/koac142] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 05/04/2022] [Indexed: 05/26/2023]
Abstract
A key function of photoreceptor signaling is the coordinated regulation of a large number of genes to optimize plant growth and development. The basic helix loop helix (bHLH) transcription factor MYC2 is crucial for regulating gene expression in Arabidopsis thaliana during development in blue light. Here we demonstrate that blue light induces the SUMOylation of MYC2. Non-SUMOylatable MYC2 is less effective in suppressing blue light-mediated photomorphogenesis than wild-type (WT) MYC2. MYC2 interacts physically with the SUMO proteases SUMO PROTEASE RELATED TO FERTILITY1 (SPF1) and SPF2. Blue light exposure promotes the degradation of SPF1 and SPF2 and enhances the SUMOylation of MYC2. Phenotypic analysis revealed that SPF1/SPF2 function redundantly as positive regulators of blue light-mediated photomorphogenesis. Our data demonstrate that SUMO conjugation does not affect the dimerization of MYC transcription factors but modulates the interaction of MYC2 with its cognate DNA cis-element and with the ubiquitin ligase Plant U-box 10 (PUB10). Finally, we show that non-SUMOylatable MYC2 is less stable and interacts more strongly with PUB10 than the WT. Taken together, we conclude that SUMO functions as a counterpoint to the ubiquitin-mediated degradation of MYC2, thereby enhancing its function in blue light signaling.
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Affiliation(s)
| | | | - Dipan Roy
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
| | - Mansi Mansi
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
| | - Catherine Gough
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
| | | | - Cunjin Zhang
- Department of Biosciences, Durham University, Durham DH1 3LE, UK
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5
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Abramson BW, Novotny M, Hartwick NT, Colt K, Aevermann BD, Scheuermann RH, Michael TP. The genome and preliminary single-nuclei transcriptome of Lemna minuta reveals mechanisms of invasiveness. PLANT PHYSIOLOGY 2022; 188:879-897. [PMID: 34893913 PMCID: PMC8825320 DOI: 10.1093/plphys/kiab564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 11/16/2021] [Indexed: 05/13/2023]
Abstract
The ability to trace every cell in some model organisms has led to the fundamental understanding of development and cellular function. However, in plants the complexity of cell number, organ size, and developmental time makes this a challenge even in the diminutive model plant Arabidopsis (Arabidopsis thaliana). Duckweed, basal nongrass aquatic monocots, provide an opportunity to follow every cell of an entire plant due to their small size, reduced body plan, and fast clonal growth habit. Here we present a chromosome-resolved genome for the highly invasive Lesser Duckweed (Lemna minuta) and generate a preliminary cell atlas leveraging low cell coverage single-nuclei sequencing. We resolved the 360 megabase genome into 21 chromosomes, revealing a core nonredundant gene set with only the ancient tau whole-genome duplication shared with all monocots, and paralog expansion as a result of tandem duplications related to phytoremediation. Leveraging SMARTseq2 single-nuclei sequencing, which provided higher gene coverage yet lower cell count, we profiled 269 nuclei covering 36.9% (8,457) of the L. minuta transcriptome. Since molecular validation was not possible in this nonmodel plant, we leveraged gene orthology with model organism single-cell expression datasets, gene ontology, and cell trajectory analysis to define putative cell types. We found that the tissue that we computationally defined as mesophyll expressed high levels of elemental transport genes consistent with this tissue playing a role in L. minuta wastewater detoxification. The L. minuta genome and preliminary cell map provide a paradigm to decipher developmental genes and pathways for an entire plant.
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Affiliation(s)
- Bradley W Abramson
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Mark Novotny
- Department of Informatics, J. Craig Venter Institute, La Jolla, California 92037, USA
| | - Nolan T Hartwick
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Kelly Colt
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
| | - Brian D Aevermann
- Department of Informatics, J. Craig Venter Institute, La Jolla, California 92037, USA
| | - Richard H Scheuermann
- Department of Informatics, J. Craig Venter Institute, La Jolla, California 92037, USA
- Department of Pathology, University of California San Diego, La Jolla, California 92093, USA
- Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, California 92037, USA
| | - Todd P Michael
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA
- Author for communication: ,
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6
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Shen Z, Chen M. Deciphering Novel Transcriptional Regulators of Soybean Hypocotyl Elongation Based on Gene Co-expression Network Analysis. FRONTIERS IN PLANT SCIENCE 2022; 13:837130. [PMID: 35273629 PMCID: PMC8902393 DOI: 10.3389/fpls.2022.837130] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 01/17/2022] [Indexed: 05/12/2023]
Abstract
Hypocotyl elongation is the key step of soybean seed germination, as well an important symbol of seedling vitality, but the regulatory mechanisms remain largely elusive. To address the problem, bioinformatics approaches along with the weighted gene co-expression network analysis (WGCNA) were carried out to elucidate the regulatory networks and identify key regulators underlying soybean hypocotyl elongation at transcriptional level. Combining results from WGCNA, yeast one hybridization, and phenotypic analysis of transgenic plants, a cyan module significantly associated with hypocotyl elongation was discerned, from which two novel regulatory submodules were identified as key candidates underpinning soybean hypocotyl elongation by modulating auxin and light responsive signaling pathways. Taken together, our results constructed the regulatory network and identified novel transcriptional regulators of soybean hypocotyl elongation based on WGCNA, which provide new insights into the global regulatory basis of soybean hypocotyl elongation and offer potential targets for soybean improvement to acquire cultivars with well-tuned hypocotyl elongation and seed germination vigor.
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Affiliation(s)
- Zhikang Shen
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Min Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China
- *Correspondence: Min Chen
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7
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Zhu CL, Xing B, Teng SZ, Deng C, Shen ZY, Ai PF, Lu TG, Zhang SW, Zhang ZG. OsRELA Regulates Leaf Inclination by Repressing the Transcriptional Activity of OsLIC in Rice. FRONTIERS IN PLANT SCIENCE 2021; 12:760041. [PMID: 34659326 PMCID: PMC8519309 DOI: 10.3389/fpls.2021.760041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Leaf angle is one of the most important agronomic traits in rice, and changes in leaf angle can alter plant architecture to affect photosynthetic efficiency and thus determine grain yield. Therefore, it is important to identify key genes controlling leaf angle and elucidate the molecular mechanisms to improve rice yield. We obtained a mutant rela (regulator of leaf angle) with reduced leaf angle in rice by EMS mutagenesis, and map-based cloning revealed that OsRELA encodes a protein of unknown function. Coincidentally, DENSE AND ERECT PANICLE 2 (DEP2) was reported in a previous study with the same gene locus. RNA-seq analysis revealed that OsRELA is involved in regulating the expression of ILI and Expansin family genes. Biochemical and genetic analyses revealed that OsRELA is able to interact with OsLIC, a negative regulator of BR signaling, through its conserved C-terminal domain, which is essential for OsRELA function in rice. The binding of OsRELA can activate the expression of downstream genes repressed by OsLIC, such as OsILI1, a positive regulator of leaf inclination in rice. Therefore, our results suggest that OsRELA can act as a transcriptional regulator and is involved in the regulation of leaf inclination by regulating the transcriptional activity of OsLIC.
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Affiliation(s)
- Chen-li Zhu
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Bao Xing
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shou-zhen Teng
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chen Deng
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhen-yong Shen
- College of Bioscience and Bioengineering, Hebei University of Science and Technology, Shijiazhuang, China
| | - Peng-fei Ai
- College of Bioscience and Bioengineering, Hebei University of Science and Technology, Shijiazhuang, China
| | - Tie-gang Lu
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Sheng-wei Zhang
- Ministry of Education Key Laboratory of Molecular and Cellular Biology, Hebei Collaboration Innovation Center for Cell Signaling and Environmental Adaptation, Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Sciences, Hebei Normal University, Shijiazhuang, China
| | - Zhi-guo Zhang
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, Chinese Academy of Agricultural Sciences, Beijing, China
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Skalak J, Nicolas KL, Vankova R, Hejatko J. Signal Integration in Plant Abiotic Stress Responses via Multistep Phosphorelay Signaling. FRONTIERS IN PLANT SCIENCE 2021; 12:644823. [PMID: 33679861 PMCID: PMC7925916 DOI: 10.3389/fpls.2021.644823] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/26/2021] [Indexed: 05/02/2023]
Abstract
Plants growing in any particular geographical location are exposed to variable and diverse environmental conditions throughout their lifespan. The multifactorial environmental pressure resulted into evolution of plant adaptation and survival strategies requiring ability to integrate multiple signals that combine to yield specific responses. These adaptive responses enable plants to maintain their growth and development while acquiring tolerance to a variety of environmental conditions. An essential signaling cascade that incorporates a wide range of exogenous as well as endogenous stimuli is multistep phosphorelay (MSP). MSP mediates the signaling of essential plant hormones that balance growth, development, and environmental adaptation. Nevertheless, the mechanisms by which specific signals are recognized by a commonly-occurring pathway are not yet clearly understood. Here we summarize our knowledge on the latest model of multistep phosphorelay signaling in plants and the molecular mechanisms underlying the integration of multiple inputs including both hormonal (cytokinins, ethylene and abscisic acid) and environmental (light and temperature) signals into a common pathway. We provide an overview of abiotic stress responses mediated via MSP signaling that are both hormone-dependent and independent. We highlight the mutual interactions of key players such as sensor kinases of various substrate specificities including their downstream targets. These constitute a tightly interconnected signaling network, enabling timely adaptation by the plant to an ever-changing environment. Finally, we propose possible future directions in stress-oriented research on MSP signaling and highlight its potential importance for targeted crop breeding.
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Affiliation(s)
- Jan Skalak
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
| | - Katrina Leslie Nicolas
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
| | - Radomira Vankova
- Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia
| | - Jan Hejatko
- CEITEC - Central European Institute of Technology and National Centre for Biomolecular Research, Masaryk University, Brno, Czechia
- *Correspondence: Jan Hejatko,
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Yadukrishnan P, Rahul PV, Datta S. HY5 Suppresses, Rather Than Promotes, Abscisic Acid-Mediated Inhibition of Postgermination Seedling Development. PLANT PHYSIOLOGY 2020; 184:574-578. [PMID: 32796090 PMCID: PMC7536681 DOI: 10.1104/pp.20.00783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/10/2020] [Indexed: 05/07/2023]
Abstract
In contradiction with what has been reported before, the light signaling factor HY5 negatively regulates ABA-mediated inhibition of post-germination seedling growth by acting downstream to COP1.
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Affiliation(s)
- Premachandran Yadukrishnan
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal-462066, Madhya Pradesh, India
| | - Puthan Valappil Rahul
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal-462066, Madhya Pradesh, India
| | - Sourav Datta
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal-462066, Madhya Pradesh, India
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Cao D, Damaris RN, Zhang Y, Liu M, Li M, Yang P. Proteomic analysis showing the signaling pathways involved in the rhizome enlargement process in Nelumbo nucifera. BMC Genomics 2019; 20:766. [PMID: 31640547 PMCID: PMC6805393 DOI: 10.1186/s12864-019-6151-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 09/30/2019] [Indexed: 11/26/2022] Open
Abstract
Background Rhizome is the storage underground stem of lotus (Nelumbo nucifera), which is enlarged before winter season and could be used for asexual propagation. In addition, the enlarged rhizome is a nutritional vegetable with abundant starch, proteins, and vitamins. Enlargement of lotus rhizome is not only significance for itself to survive from the cold winter, but also important for its economic value. Results To explore the mechanism underlying its enlargement, integrative analyses of morphology, physiology and proteomics were conducted on the rhizome at stolon, middle, and enlarged stages. Morphological observation and physiological analyses showed that rhizomes were gradually enlarged during this process, in which the starch accumulation was also initiated. Quantitative proteomic analysis on the rhizomes at these three stages identified 302 stage-specific proteins (SSPs) and 172 differently expressed proteins (DEPs), based on which GO and KEGG enrichment analyses were conducted. The results indicated that light and auxin signal might be transduced through secondary messenger Ca2+, and play important roles in lotus rhizome enlargement. Conclusion These results will provide new insights into understanding the mechanism of lotus rhizome enlargement. Meanwhile, some candidate genes might be useful for further studies on this process, as well as breeding of rhizome lotus.
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Affiliation(s)
- Dingding Cao
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Rebecca Njeri Damaris
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, 430062, China
| | - Yue Zhang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meihui Liu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ming Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, 430062, China.
| | - Pingfang Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, 430062, China.
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11
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Kamal N, Ochßner I, Schwandner A, Viehöver P, Hausmann L, Töpfer R, Weisshaar B, Holtgräwe D. Characterization of genes and alleles involved in the control of flowering time in grapevine. PLoS One 2019; 14:e0214703. [PMID: 31269026 PMCID: PMC6608932 DOI: 10.1371/journal.pone.0214703] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 06/18/2019] [Indexed: 12/30/2022] Open
Abstract
Grapevine (Vitis vinifera) is one of the most important perennial crop plants in worldwide. Understanding of developmental processes like flowering, which impact quality and quantity of yield in this species is therefore of high interest. This gets even more important when considering some of the expected consequences of climate change. Earlier bud burst and flowering, for example, may result in yield loss due to spring frost. Berry ripening under higher temperatures will impact wine quality. Knowledge of interactions between a genotype or allele combination and the environment can be used for the breeding of genotypes that are better adapted to new climatic conditions. To this end, we have generated a list of more than 500 candidate genes that may play a role in the timing of flowering. The grapevine genome was exploited for flowering time control gene homologs on the basis of functional data from model organisms like A. thaliana. In a previous study, a mapping population derived from early flowering GF.GA-47-42 and late flowering 'Villard Blanc' was analyzed for flowering time QTLs. In a second step we have now established a workflow combining amplicon sequencing and bioinformatics to follow alleles of selected candidate genes in the F1 individuals and the parental genotypes. Allele combinations of these genes in individuals of the mapping population were correlated with early or late flowering phenotypes. Specific allele combinations of flowering time candidate genes within and outside of the QTL regions for flowering time on chromosome 1, 4, 14, 17, and 18 were found to be associated with an early flowering phenotype. In addition, expression of many of the flowering candidate genes was analyzed over consecutive stages of bud and inflorescence development indicating functional roles of these genes in the flowering control network.
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Affiliation(s)
- Nadia Kamal
- Bielefeld University, Faculty of Biology & Center for Biotechnology, Bielefeld, Germany
| | - Iris Ochßner
- Julius Kühn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Anna Schwandner
- Julius Kühn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Prisca Viehöver
- Bielefeld University, Faculty of Biology & Center for Biotechnology, Bielefeld, Germany
| | - Ludger Hausmann
- Julius Kühn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Reinhard Töpfer
- Julius Kühn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Bernd Weisshaar
- Bielefeld University, Faculty of Biology & Center for Biotechnology, Bielefeld, Germany
| | - Daniela Holtgräwe
- Bielefeld University, Faculty of Biology & Center for Biotechnology, Bielefeld, Germany
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Woloszynska M, Gagliardi O, Vandenbussche F, De Groeve S, Alonso Baez L, Neyt P, Le Gall S, Fung J, Mas P, Van Der Straeten D, Van Lijsebettens M. The Elongator complex regulates hypocotyl growth in darkness and during photomorphogenesis. J Cell Sci 2018; 131:jcs.203927. [PMID: 28720596 DOI: 10.1242/jcs.203927] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 07/10/2017] [Indexed: 12/20/2022] Open
Abstract
The Elongator complex (hereafter Elongator) promotes RNA polymerase II-mediated transcript elongation through epigenetic activities such as histone acetylation. Elongator regulates growth, development, immune response and sensitivity to drought and abscisic acid. We demonstrate that elo mutants exhibit defective hypocotyl elongation but have a normal apical hook in darkness and are hyposensitive to light during photomorphogenesis. These elo phenotypes are supported by transcriptome changes, including downregulation of circadian clock components, positive regulators of skoto- or photomorphogenesis, hormonal pathways and cell wall biogenesis-related factors. The downregulated genes LHY, HFR1 and HYH are selectively targeted by Elongator for histone H3K14 acetylation in darkness. The role of Elongator in early seedling development in darkness and light is supported by hypocotyl phenotypes of mutants defective in components of the gene network regulated by Elongator, and by double mutants between elo and mutants in light or darkness signaling components. A model is proposed in which Elongator represses the plant immune response and promotes hypocotyl elongation and photomorphogenesis via transcriptional control of positive photomorphogenesis regulators and a growth-regulatory network that converges on genes involved in cell wall biogenesis and hormone signaling.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Magdalena Woloszynska
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Olimpia Gagliardi
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Filip Vandenbussche
- Department of Physiology, Laboratory of Functional Plant Biology, Ghent University, 9000 Ghent, Belgium
| | - Steven De Groeve
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Luis Alonso Baez
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Pia Neyt
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Sabine Le Gall
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium.,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
| | - Jorge Fung
- Center for Research in AgriGenomics (CRAG), Consortium CSIC-IRTA-UAB-UB, 08193 Barcelona, Spain
| | - Paloma Mas
- Center for Research in AgriGenomics (CRAG), Consortium CSIC-IRTA-UAB-UB, 08193 Barcelona, Spain
| | | | - Mieke Van Lijsebettens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium .,VIB Center for Plant Systems Biology, 9052 Ghent, Belgium
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Song J, Liu Q, Hu B, Wu W. Photoreceptor PhyB Involved in Arabidopsis Temperature Perception and Heat-Tolerance Formation. Int J Mol Sci 2017; 18:ijms18061194. [PMID: 28587227 PMCID: PMC5486017 DOI: 10.3390/ijms18061194] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/30/2017] [Accepted: 05/31/2017] [Indexed: 01/02/2023] Open
Abstract
The influence of temperature on plants is essential. However, our knowledge on the intricate regulation process underlying heat stress (HS) response in plants is limited. Recently, information about thermal sensors in vivo has begun to emerge. In this study, another primary environmental stimulus, light, was verified once again to work with temperature synergistically on plants, through the modulation of numerous biological processes. With the application of transcriptomic analysis, a substantial number of heat-responsive genes were detected involved in both light- and phytohormone-mediated pathways in Arabidopsis. During this process, phytoreceptor phyB acts as a molecular switch to turn on or turn off several other genes HS response, under different light conditions. Furthermore, a morphological study showed the afunction of phyB enhanced plants thermal tolerance, confirming the important role of this phytochrome in temperature perception and response in plants. This study adds data to the picture of light and temperature signaling cross-talk in plants, which is important for the exploration of complicated HS responses or light-mediated mechanisms. Furthermore, based on its influence on Arabidopsis thermal response in both morphological and physiological levels, phyB is a photoreceptor, as revealed before, as well as an essential thermal sensor in plants.
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Affiliation(s)
- Junyi Song
- College of Science, National University of Defense Technology, Changsha 410073, China.
| | - Qijun Liu
- College of Science, National University of Defense Technology, Changsha 410073, China.
| | - Biru Hu
- College of Science, National University of Defense Technology, Changsha 410073, China.
| | - Wenjian Wu
- College of Science, National University of Defense Technology, Changsha 410073, China.
- State Key Lab of Nuclear, Biological and Chemical Protection for Civilian, Beijing 102205, China.
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Bo K, Wang H, Pan Y, Behera TK, Pandey S, Wen C, Wang Y, Simon PW, Li Y, Chen J, Weng Y. SHORT HYPOCOTYL1 Encodes a SMARCA3-Like Chromatin Remodeling Factor Regulating Elongation. PLANT PHYSIOLOGY 2016; 172:1273-1292. [PMID: 27559036 PMCID: PMC5047076 DOI: 10.1104/pp.16.00501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 08/22/2016] [Indexed: 05/18/2023]
Abstract
In Arabidopsis (Arabidopsis thaliana), the UVR8-mediated signaling pathway is employed to attain UVB protection and acclimation to deal with low-dosage UVB (LDUVB)-induced stresses. Here, we identified SHORT HYPOCOTYL1 (SH1) in cucumber (Cucumis sativus), which regulates LDUVB-dependent hypocotyl elongation by modulating the UVR8 signaling pathway. We showed that hypocotyl elongation in cucumbers carrying the recessive sh1 allele was LDUVB insensitive and that Sh1 encoded a human SMARCA3-like chromatin remodeling factor. The allele frequency and distribution pattern at this locus among natural populations supported the wild cucumber origin of sh1 for local adaptation, which was under selection during domestication. The cultivated cucumber carries predominantly the Sh1 allele; the sh1 allele is nearly fixed in the semiwild Xishuangbanna cucumber, and the wild cucumber population is largely at Hardy-Weinberg equilibrium for the two alleles. The SH1 protein sequence was highly conserved among eukaryotic organisms, but its regulation of hypocotyl elongation in cucumber seems to be a novel function. While Sh1 expression was inhibited by LDUVB, its transcript abundance was highly correlated with hypocotyl elongation rate and the expression level of cell-elongation-related genes. Expression profiling of key regulators in the UVR8 signaling pathway revealed significant differential expression of CsHY5 between two near isogenic lines of Sh1 Sh1 and CsHY5 acted antagonistically at transcriptional level. A working model was proposed in which Sh1 regulates LDUVB-dependent hypocotyl elongation in cucumber through changing the chromatin states and thus the accessibility of CsHY5 in the UVR8 signaling pathway to promoters of LDUVB-responsive genes for hypocotyl elongation.
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Affiliation(s)
- Kailiang Bo
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Hui Wang
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yupeng Pan
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Tusar K Behera
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Sudhakar Pandey
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Changlong Wen
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yuhui Wang
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Philipp W Simon
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yuhong Li
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Jinfeng Chen
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
| | - Yiqun Weng
- Horticulture Department, University of Wisconsin, Madison, Wisconsin 53706 (K.B., Y.P., Y.Wa., P.W.S., Y.We.); Horticulture College, Nanjing Agricultural University, Nanjing 210095, China (K.B., J.C.);Horticulture College, Northwest A&F University, Yangling 712100, China (H.W., Y.P., Y.L.);Division of Vegetable Science, Indian Agricultural Research Institute, New Delhi 10012, India (T.K.B.);Division of Crop Improvement, Indian Council of Agricultural Research-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh 221305, India (S.P.);Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China (C.W.); andVegetable Crops Research Unit, United States Department of Agriculture Agricultural Research Service, Madison, Wisconsin 53706 (P.W.S., Y.We.)
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The Arabidopsis MIEL1 E3 ligase negatively regulates ABA signalling by promoting protein turnover of MYB96. Nat Commun 2016; 7:12525. [PMID: 27615387 PMCID: PMC5027273 DOI: 10.1038/ncomms12525] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 07/07/2016] [Indexed: 01/31/2023] Open
Abstract
The phytohormone abscisic acid (ABA) regulates plant responses to various environmental challenges. Controlled protein turnover is an important component of ABA signalling. Here we show that the RING-type E3 ligase MYB30-INTERACTING E3 LIGASE 1 (MIEL1) regulates ABA sensitivity by promoting MYB96 turnover in Arabidopsis. Germination of MIEL1-deficient mutant seeds is hypersensitive to ABA, whereas MIEL1-overexpressing transgenic seeds are less sensitive. MIEL1 can interact with MYB96, a regulator of ABA signalling, and stimulate its ubiquitination and degradation. Genetic analysis shows that MYB96 is epistatic to MIEL1 in the control of ABA sensitivity in seeds. While MIEL1 acts primarily via MYB96 in seed germination, MIEL1 regulates protein turnover of both MYB96 and MYB30 in vegetative tissues. We find that ABA regulates the expression of MYB30-responsive genes during pathogen infection and this regulation is partly dependent on MIEL1. These results suggest that MIEL1 may facilitate crosstalk between ABA and biotic stress signalling. The phytohormone abscisic acid controls plant responses to environmental stress, partly by regulating protein turnover. Here the authors propose that abscisic acid regulates seed germination by promoting degradation of the MYB96 transcription factor via the MIEL1 E3 ubiquitin (Ub) ligase.
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