CsWRKY11 cooperates with CsNPR1 to regulate SA-triggered leaf de-greening and reactive oxygen species burst in cucumber

文献类型： 外文期刊

第一作者： Zhang, Dingyu

作者： Zhang, Dingyu;Yang, Bing;Li, Xiaofeng;Zhang, Hongmei;Zhu, Hongfang;Zhang, Dingyu;Zhu, Ziwei;Zhang, Dingyu;Zhu, Ziwei

作者机构：

关键词： Salicylic acid; CsNPR1; CsWRKY11; Chlorophyll degradation; ROS burst

期刊名称：MOLECULAR HORTICULTURE （ 影响因子：8.1； 五年影响因子：11.0 ）

ISSN： 2730-9401

年卷期： 2024 年 4 卷 1 期

页码：

收录情况： SCI

摘要： Salicylic acid (SA) is a multi-functional phytohormone, regulating diverse processes of plant growth and development, especially triggering plant immune responses and initiating leaf senescence. However, the early SA signaling events remain elusive in most plant species apart from Arabidopsis, and even less is known about the multi-facet mechanism underlying SA-regulated processes. Here, we report the identification of a novel regulatory module in cucumber, CsNPR1-CsWRKY11, which mediates the regulation of SA-promoted leaf senescence and ROS burst. Our analyses demonstrate that under SA treatment, CsNPR1 recruits CsWRKY11 to bind to the promoter of CsWRKY11 to activate its expression, thus amplifying the primary SA signal. Then, CsWRKY11 cooperates with CsNPR1 to directly regulate the expression of both chlorophyll degradation and ROS biosynthesis related genes, thereby inducing leaf de-greening and ROS burst. Our study provides a solid line of evidence that CsNPR1 and CsWRKY11 constitute a key module in SA signaling pathway in cucumber, and gains an insight into the interconnected regulation of SA-triggered processes.

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