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The woody plant-degrading pathogen Lasiodiplodia theobromae effector LtCre1 targets the grapevine sugar-signaling protein VvRHIP1 to suppress host immunity

文献类型： 外文期刊

作者： Xing, Qikai 1 ; Zhou, Xiangui 2 ; Cao, Yang 1 ; Peng, Junbo 1 ; Zhang, Wei 1 ; Wang, Xuncheng 1 ; Wu, Jiahong 1 ; Li, Xinghong 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.Peking Univ, Sch Adv Agr Sci, State Key Lab Prot & Plant Gene Res, Beijing 100871, Peoples R China

3.Peking Univ, Peking Tsinghua Ctr Life Sci, Sch Life Sci, Beijing 100871, Peoples R China

关键词： Fungal effector; grapevine; Lasiodiplodia theobromae; plant immunity; plant-pathogen interaction; sugar signaling; susceptibility; Vitis vinifera

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.9； 五年影响因子：8.0 ）

ISSN： 0022-0957

年卷期： 2023 年 74 卷 8 期

页码：

收录情况： SCI

摘要： Lasiodiplodia theobromae is a causal agent of Botryosphaeria dieback, which seriously threatens grapevine production worldwide. Plant pathogens secrete diverse effectors to suppress host immune responses and promote the progression of infection, but the mechanisms underlying the manipulation of host immunity by L. theobromae effectors are poorly understood. In this study, we characterized LtCre1, which encodes a L. theobromae effector that suppresses BAX-triggered cell death in Nicotiana benthamiana. RNAi-silencing and overexpression of LtCre1 in L. theobromae showed impaired and increased virulence, respectively, and ectopic expression in N. benthamiana increased susceptibility. These results suggest that LtCre1 is as an essential virulence factor for L. theobromae. Protein-protein interaction studies revealed that LtCre1 interacts with grapevine RGS1-HXK1-interacting protein 1 (VvRHIP1). Ectopic overexpression of VvRHIP1 in N. benthamiana reduced infection, suggesting that VvRHIP1 enhances plant immunity against L. theobromae. LtCre1 was found to disrupt the formation of the VvRHIP1-VvRGS1 complex and to participate in regulating the plant sugar-signaling pathway. Thus, our results suggest that L. theobromae LtCre1 targets the grapevine VvRHIP1 protein to manipulate the sugar-signaling pathway by disrupting the association of the VvRHIP1-VvRGS1 complex. The Lasiodiplodia theobromaeLtCre1 effector disrupts the formation of the VvRHIP1-VvRGS1 complex in grapevine, which interferes with sugar signaling and suppresses the expression of genes related to plant immunity

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