アクセス数 : ?
ダウンロード数 : ?
ID 114324
タイトル別表記
Function of KAI2 signaling in plant drought adaptation
著者
Li, Weiqiang RIKEN Center for Sustainable Resource Science
Nguyen, Kien Huu RIKEN Center for Sustainable Resource Science
Chu, Ha Duc RIKEN Center for Sustainable Resource Science
Ha, Chien Van RIKEN Center for Sustainable Resource Science
Watanabe, Yasuko RIKEN Center for Sustainable Resource Science
Leyva-González, Marco Antonio Technische Universität Dresden
Sato, Mayuko RIKEN Center for Sustainable Resource Science
Toyooka, Kiminori RIKEN Center for Sustainable Resource Science
Voges, Laura University of Georgia
Tanaka, Maho RIKEN Center for Sustainable Resource Science
Mostofa, Mohammad Golam RIKEN Center for Sustainable Resource Science
Seki, Motoaki RIKEN Center for Sustainable Resource Science
Seo, Mitsunori RIKEN Center for Sustainable Resource Science
Yamaguchi, Shinjiro Tohoku University
Nelson, David C. University of California
Tian, Chunjie Chinese Academy of Sciences
Herrera-Estrella, Luis Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional
Tran, Lam-Son Phan RIKEN Center for Sustainable Resource Science
資料タイプ
学術雑誌論文
抄録
Drought causes substantial reductions in crop yields worldwide. Therefore, we set out to identify new chemical and genetic factors that regulate drought resistance in Arabidopsis thaliana. Karrikins (KARs) are a class of butenolide compounds found in smoke that promote seed germination, and have been reported to improve seedling vigor under stressful growth conditions. Here, we discovered that mutations in KARRIKIN INSENSITIVE2 (KAI2), encoding the proposed karrikin receptor, result in hypersensitivity to water deprivation. We performed transcriptomic, physiological and biochemical analyses of kai2 plants to understand the basis for KAI2-regulated drought resistance. We found that kai2 mutants have increased rates of water loss and drought-induced cell membrane damage, enlarged stomatal apertures, and higher cuticular permeability. In addition, kai2 plants have reduced anthocyanin biosynthesis during drought, and are hyposensitive to abscisic acid (ABA) in stomatal closure and cotyledon opening assays. We identified genes that are likely associated with the observed physiological and biochemical changes through a genome-wide transcriptome analysis of kai2 under both well-watered and dehydration conditions. These data provide evidence for crosstalk between ABA- and KAI2-dependent signaling pathways in regulating plant responses to drought. A comparison of the strigolactone receptor mutant d14 (DWARF14) to kai2 indicated that strigolactones also contributes to plant drought adaptation, although not by affecting cuticle development. Our findings suggest that chemical or genetic manipulation of KAI2 and D14 signaling may provide novel ways to improve drought resistance.
掲載誌名
PLOS Genetics
ISSN
1553-7390
1553-7404
出版者
PLOS
13
11
開始ページ
e1007076
発行日
2017-11-13
権利情報
©2017 Li et al. This is an open access article distributed under the terms of the Creative Commons Attribution License( https://creativecommons.org/licenses/by/4.0/ ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
生物資源系