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KARRIKIN UPREGULATED F-BOX 1 negatively regulates drought tolerance in Arabidopsis

Weiqiang (57203305478) | Lam-Son Phan (7102277565); Li | Yuchen (15062978900); Tran | Motoaki (7402040474); Miao | Maho (12241764000); Seki | Chunjie (57609594100); Tanaka Plant Epigenome Regulation Laboratory, RIKEN Cluster for Pioneering Research, Wako, Japan| Keiichi (7102215099); Tian Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource Science, Yokohama, Japan| David C. (26029202200); Mochida School of Information and Data Sciences, Nagasaki University, Nagasaki, Japan| Chien (55372157800); Nelson Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan| Mohammad Golam (57055855700); Van Ha Kihara Institute for Biological Research, Yokohama City University, Yokohama, Japan| Claudia (57353601500); Mostofa Microalgae Production Control Technology Laboratory, RIKEN Baton Zone Program, RIKEN Cluster for Science, Technology and Innovation Hub, Yokohama, Japan| Kun (57987028100); Sepulveda Institute of Genomics for Crop Abiotic Stress Tolerance, Texas Tech University, Lubbock, 79409, TX, United States| Xiaohan (57907524400); Xu Department of Botany and Plant Sciences, University of California, Riverside, 92521, CA, United States| Mostafa (56542956600); Liang Molecular Biotechnology Program, Faculty of Science, Galala University, Suze, New Galala, 43511, Egypt| Cuong Duy (57204683516); Abdelrahman Botany Department, Faculty of Science, Aswan University, Aswan, 81528, Egypt| Kien Huu (56708070600); Tran National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, Vietnam Academy of Agricultural Science, Pham-Van-Dong Str., Hanoi, 100000, Viet Nam| Yasuko (55497634000); Nguyen Bioproductivity Informatics Research Team, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi, Yokohama, 230-0045, Japan| Hongtao (57218140274); Watanabe State Key Laboratory of Cotton Biology, Henan Joint International Laboratory for Crop Multi-Omics Research, School of Life Sciences, Henan University, No. 85 Jinming Road, Kaifeng, 475004, China|

Plant Physiology Số 4, năm 2022 (Tập 190, trang 2671-2687)

ISSN: 320889

ISSN: 320889

DOI: 10.1093/plphys/kiac336

Tài liệu thuộc danh mục:

Article

English

Từ khóa: Abscisic Acid; Arabidopsis; Arabidopsis Proteins; Droughts; Gene Expression Regulation, Plant; Plant Stomata; Plants, Genetically Modified; Stress, Physiological; Water; 3-methyl-2H-furo(2,3-c)pyran-2-one; abscisic acid; Arabidopsis protein; water; Arabidopsis; drought; gene expression regulation; genetics; metabolism; physiological stress; physiology; plant stoma; transgenic plant
Tóm tắt tiếng anh
The karrikin (KAR) receptor and several related signaling components have been identified by forward genetic screening, but only a few studies have reported on upstream and downstream KAR signaling components and their roles in drought tolerance. Here, we characterized the functions of KAR UPREGULATED F-BOX 1 (KUF1) in drought tolerance using a reverse genetics approach in Arabidopsis (Arabidopsis thaliana). We observed that kuf1 mutant plants were more tolerant to drought stress than wild-type (WT) plants. To clarify the mechanisms by which KUF1 negatively regulates drought tolerance, we performed physiological, transcriptome, and morphological analyses. We found that kuf1 plants limited leaf water loss by reducing stomatal aperture and cuticular permeability. In addition, kuf1 plants showed increased sensitivity of stomatal closure, seed germination, primary root growth, and leaf senescence to abscisic acid (ABA). Genome-wide transcriptome comparisons of kuf1 and WT rosette leaves before and after dehydration showed that the differences in various drought tolerance-related traits were accompanied by differences in the expression of genes associated with stomatal closure (e.g. OPEN STOMATA 1), lipid and fatty acid metabolism (e.g. WAX ESTER SYNTHASE), and ABA responsiveness (e.g. ABA-RESPONSIVE ELEMENT 3). The kuf1 mutant plants had higher root/shoot ratios and root hair densities than WT plants, suggesting that they could absorb more water than WT plants. Together, these results demonstrate that KUF1 negatively regulates drought tolerance by modulating various physiological traits, morphological adjustments, and ABA responses and that the genetic manipulation of KUF1 in crops is a potential means of enhancing their drought tolerance. � American Society of Plant Biologists 2022. All rights reserved.

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