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Function of two splicing variants of RcCPR5 in the resistance of Rosa chinensis to powdery mildew

文献类型： 外文期刊

作者： Li, Xiaorui 1 ; He, Guoren 1 ; Jiang, Shenghang 1 ; Yang, Chun 1 ; Yang, Binan 1 ; Ming, Feng 1 ;

作者机构： 1.Shanghai Normal Univ, Coll Life Sci, Shanghai Key Lab Plant Mol Sci, Shanghai 200234, Peoples R China

2.Shanghai Acad Agr Sci, Biotechnol Res Inst, Shanghai 201106, Peoples R China

关键词： Rosa chinensis; RcCPR5; ETI; Powdery mildew

期刊名称：PLANT SCIENCE （ 影响因子：5.2； 五年影响因子：5.7 ）

ISSN： 0168-9452

年卷期： 2023 年 335 卷

页码：

收录情况： SCI

摘要： Rosa chinensis is an important economic and ornamental crop, but powdery mildew greatly reduces its ornamental and economic value. The RcCPR5 gene, encoding a constitutive expressor of pathogenesis-related genes, has two splicing variants in R. chinensis. Compared with RcCPR5-1, RcCPR5-2 has a large C-terminal deletion. During disease development, RcCPR5-2 responded quickly and coordinated with RcCPR5-1 to resist the invasion of the powdery mildew pathogen. In virus-induced gene silencing experiments, down-regulation of RcCPR5 improved the resistance of R. chinensis to powdery mildew. This was confirmed to be broad-spectrum resistance. In the absence of pathogen infection, RcCPR5-1 and RcCPR5-2 formed homodimers and heterodimers to regulate plant growth; but when infected by the powdery mildew pathogen, the RcCPR5-1 and RcCPR5-2 complexes disassociated and released RcSIM/RcSMR to induce effector-triggered immunity, thereby inducing resistance to pathogen infection.

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