ABA receptor PYL9 promotes drought resistance and leaf senescence | |
Zhao, Yang ; Chan, Zhulong ; Gao, Jinghui ; Xing, Lu ; Cao, Minjie ; Yu, Chunmei ; Hu, Yuanlei ; You, Jun ; Shi, Haitao ; Zhu, Yingfang ; Gong, Yuehua ; Mu, Zixin ; Wang, Haiqing ; Deng, Xin ; Wang, Pengcheng ; Bressan, Ray A. ; Zhu, Jian-Kang | |
刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2016 | |
关键词 | drought stress abscisic acid PYL dormancy Arabidopsis RAV1 TRANSCRIPTION FACTOR ABSCISIC-ACID GENE-EXPRESSION ARABIDOPSIS PROTEIN STRESS DORMANCY PATHWAYS FAMILY PLANT |
DOI | 10.1073/pnas.1522840113 |
英文摘要 | Drought stress is an important environmental factor limiting plant productivity. In this study, we screened drought-resistant transgenic plants from 65 promoter-pyrabactin resistance 1-like (PYL) abscisic acid (ABA) receptor gene combinations and discovered that pRD29A::PYL9 transgenic lines showed dramatically increased drought resistance and drought-induced leaf senescence in both Arabidopsis and rice. Previous studies suggested that ABA promotes senescence by causing ethylene production. However, we found that ABA promotes leaf senescence in an ethylene-independent manner by activating sucrose nonfermenting 1-related protein kinase 2s (SnRK2s), which subsequently phosphorylate ABA-responsive element-binding factors (ABFs) and Related to ABA-Insensitive 3/VP1 (RAV1) transcription factors. The phosphorylated ABFs and RAV1 up-regulate the expression of senescence-associated genes, partly by up-regulating the expression of Oresara 1. The pyl9 and ABA-insensitive 1-1 single mutants, pyl8-1pyl9 double mutant, and snrk2.2/3/6 triple mutant showed reduced ABA-induced leaf senescence relative to the WT, whereas pRD29A::PYL9 transgenic plants showed enhanced ABA-induced leaf senescence. We found that leaf senescence may benefit drought resistance by helping to generate an osmotic potential gradient, which is increased in pRD29A::PYL9 transgenic plants and causes water to preferentially flow to developing tissues. Our results uncover the molecular mechanism of ABA-induced leaf senescence and suggest an important role of PYL9 and leaf senescence in promoting resistance to extreme drought stress.; NIH [R01GM059138]; Chinese Academy of Sciences; National Natural Science Foundation of China [31370302]; Knowledge Innovative Key Program of CAS [Y329631O0263]; Sino-Africa Joint Research Project Grant [SAJC201324]; SCI(E); PubMed; ARTICLE; jkzhu@purdue.edu; 7; 1949-1954; 113 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/435130] ![]() |
专题 | 生命科学学院 |
推荐引用方式 GB/T 7714 | Zhao, Yang,Chan, Zhulong,Gao, Jinghui,et al. ABA receptor PYL9 promotes drought resistance and leaf senescence[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2016. |
APA | Zhao, Yang.,Chan, Zhulong.,Gao, Jinghui.,Xing, Lu.,Cao, Minjie.,...&Zhu, Jian-Kang.(2016).ABA receptor PYL9 promotes drought resistance and leaf senescence.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. |
MLA | Zhao, Yang,et al."ABA receptor PYL9 promotes drought resistance and leaf senescence".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2016). |
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