AtWRKY75 positively regulates age-triggered leaf senescence through gibberellin pathway

doi:10.1016/j.pld.2020.10.002

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	AtWRKY75 positively regulates age-triggered leaf senescence through gibberellin pathway
	Zhang,Haiyan ; Zhang,Liping ; Wu,Songguo ; Chen,Yanli ; Yu,Diqiu ; Chen,Ligang
	2021
发表期刊	PLANT DIVERSITY
ISSN	2096-2703
卷号	43 期号:4 页码:331-340
摘要	WRKY transcription factors play essential roles during leaf senescence. However, the mechanisms by which they regulate this process remains largely unknown. Here, we identified the transcription factor WRKY75 as a positive regulator during leaf senescence. Mutations of WRKY75 caused a delay in age-triggered leaf senescence, whereas overexpression of WRKY75 markedly accelerated this process. Expression of senescence-associated genes (SAGs) was suppressed in WRKY75 mutants but increased in WRKY75-overexpressing plants. Further analysis demonstrated that WRKY75 directly associates with the promoters of SAG12 and SAG29, to activate their expression. Conversely, GAI and RGL1, two DELLA proteins, can suppress the WRKY75-mediated activation, thereby attenuating SAG expression during leaf senescence. Genetic analyses showed that GAI gain-of-function or RGL1 overexpression can partially rescue the accelerated senescence phenotype caused by WRKY75 overexpression. Furthermore, WRKY75 can positively regulate WRKY45 expression during leaf senescence. Our data thus imply that WRKY75 may positively modulate age-triggered leaf senescence through the gibberellin-mediated signaling pathway. Copyright (C) 2020 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
关键词	WRKY75 Leaf senescence GA DELLAs TRANSCRIPTION FACTOR WRKY75 SALICYLIC-ACID PLANT SENESCENCE ARABIDOPSIS EXPRESSION STRESS PROTEINS GENES
DOI	10.1016/j.pld.2020.10.002
WOS记录号	WOS:000687818400010
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73117
专题	中国科学院昆明植物研究所
作者单位	1.Chinese Acad Sci, CAS Key Lab Trop Plant Resources & Sustainable Us, Xishuangbanna Trop Bot Garden, Kunming 650223, Yunnan, Peoples R China 2.Chinese Acad Sci, Ctr Econ Bot, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Yunnan Univ, State Key Lab Conservat & Utilizat Bioresources Y, Kunming 650091, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Zhang,Haiyan,Zhang,Liping,Wu,Songguo,et al. AtWRKY75 positively regulates age-triggered leaf senescence through gibberellin pathway[J]. PLANT DIVERSITY,2021,43(4):331-340.
APA	Zhang,Haiyan,Zhang,Liping,Wu,Songguo,Chen,Yanli,Yu,Diqiu,&Chen,Ligang.(2021).AtWRKY75 positively regulates age-triggered leaf senescence through gibberellin pathway.PLANT DIVERSITY,43(4),331-340.
MLA	Zhang,Haiyan,et al."AtWRKY75 positively regulates age-triggered leaf senescence through gibberellin pathway".PLANT DIVERSITY 43.4(2021):331-340.

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