PIF3 is phosphorylated by MAPK to modulate plant immunity

文献类型： 外文期刊

第一作者： Zhao, Yan

作者： Zhao, Yan;Zheng, Xiaojuan;Zhang, Xiaojuan;Wang, Wei;Zhou, Jian-Min;Zhao, Yan;Sun, Chuanqing;Zheng, Xiaojuan;Zhou, Jian-Min;Cai, Gaihong;Chen, She;Bi, Guozhi;Zhou, Jian-Min

作者机构：

关键词： gene regulation; MAPK cascades; phytochrome-interacting factors; plant immunity; signal transduction

期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）

ISSN： 0028-646X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： circle Surface-localized pattern recognition receptors perceive pathogen-associated molecular patterns (PAMPs) to activate pattern-triggered immunity (PTI). Activation of mitogenactivated protein kinases (MAPKs) represents a major PTI response. circle Here, we report that Arabidopsis thaliana PIF3 negatively regulates plant defense gene expression and resistance to Pseudomonas syringae DC3000. PAMPs trigger phosphorylation of PIF3. Further study reveals that PIF3 interacts with and is phosphorylated by MPK3/6 . circle By mass spectrometry and site-directed mutagenesis, we identified the corresponding phosphorylation sites which fit for SP motif. We further show that a phospho-mimicking PIF3 variant (PIF3(6D)/pifq) conferred increased susceptibility to P. syringae DC3000 and caused lower levels of defense gene expression in plants. circle Together, this study reveals that PIF3 is phosphorylated by MPK3/6 and phosphorylation of the SP motif residues is required for its negative regulation on plant immunity.

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