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LtGAPR1 Is a Novel Secreted Effector from Lasiodiplodia theobromae That Interacts with NbPsQ2 to Negatively Regulate Infection

文献类型: 外文期刊

作者: Huang, Caiping 1 ; Peng, Junbo 1 ; Zhang, Wei 1 ; Chethana, Thilini 2 ; Wang, Xuncheng 1 ; Wang, Hui 1 ; Yan, Jiye 1 ;

作者机构: 1.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing Key Lab Environm Friendly Management Fruit, Beijing 100097, Peoples R China

2.Mae Fah Luang Univ, Ctr Excellence Fungal Res, Chiang Rai 57100, Thailand

3.Mae Fah Luang Univ, Sch Sci, Chiang Rai 57100, Thailand

关键词: Lasiodiplodia theobromae; plant immunity; effector; PsbQ2

期刊名称:JOURNAL OF FUNGI ( 影响因子:4.7; 五年影响因子:5.2 )

ISSN:

年卷期: 2023 年 9 卷 2 期

页码:

收录情况: SCI

摘要: The effector proteins secreted by a pathogen not only promote the virulence and infection of the pathogen but also trigger plant defense response. Lasiodiplodia theobromae secretes many effectors that modulate and hijack grape processes to colonize host cells, but the underlying mechanisms remain unclear. Herein, we report LtGAPR1, which has been proven to be a secreted protein. In our study, LtGAPR1 played a negative role in virulence. By co-immunoprecipitation, 23 kDa oxygen-evolving enhancer 2 (NbPsbQ2) was identified as a host target of LtGAPR1. The overexpression of NbPsbQ2 in Nicotiana benthamiana reduced susceptibility to L. theobromae, and the silencing of NbPsbQ2 enhanced L. theobromae infection. LtGAPR1 and NbPsbQ2 were confirmed to interact with each other. Transiently, expressed LtGAPR1 activated reactive oxygen species (ROS) production in N. benthamiana leaves. However, in NbPsbQ2-silenced leaves, ROS production was impaired. Overall, our report revealed that LtGAPR1 promotes ROS accumulation by interacting with NbPsbQ2, thereby triggering plant defenses that negatively regulate infection.

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