文献类型： 外文期刊
作者： Zhao, Yan 1 ; Zheng, Xiaojuan 1 ; Zhang, Xiaojuan 1 ; Wang, Wei 1 ; Cai, Gaihong 4 ; Bi, Guozhi 5 ; Chen, She 4 ; Sun, Chuanqing 2 ; Zhou, Jian-Min 1 ;
作者机构： 1.Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China
2.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
3.Univ Chinese Acad Sci, CAS Ctr Excellence Biot Interact, Beijing 100049, Peoples R China
4.Natl Inst Biol Sci, Beijing 100101, Peoples R China
5.China Agr Univ, Coll Biol Sci, Beijing 100193, Peoples R China
6.Hainan Yazhou Bay Seed Lab, Sanya 572025, Hainan, Peoples R China
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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