Inhibition of PbeXTH1 and PbeSEOB1 is required for the Valsa canker resistance contributed by Wall-associated kinase gene MbWAK1

文献类型： 外文期刊

第一作者： Lu, Yuan

作者： Lu, Yuan;Mao, Xia;Wang, Chao;Zheng, Yan;Duo, Hu;Sun, E.;Yu, Hongqiang;Zuo, Cunwu;Chen, Zhongjian;Zuo, Cunwu

作者机构：

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：5.4； 五年影响因子：5.5 ）

ISSN： 0031-9317

年卷期： 2024 年 176 卷 3 期

页码：

收录情况： SCI

摘要： Wall-associated kinases (WAKs) have been determined to recognize pathogenic signals and initiate plant immune responses. However, the roles of the family members in host resistance against Valsa canker, a serious fungal disease of apples and pears, are largely unknown. Here, we identified MbWAK1 in Malus baccata, a resistant germplasm differentially expressed during infection by Valsa mali (Vm). Over-expression of MbWAK1 enhanced the Valsa canker resistance of apple and pear fruits and 'Duli-G03' (Pyrus betulifolia) suspension cells. A large number of phloem, cell wall, and lipid metabolic process-related genes were differentially expressed in overexpressed suspension cell lines in response to Valsa pyri (Vp) signals. Among these, the expression of xyloglucan endotransglucosylase/hydrolase (XTH) gene PbeXTH1 and sieve element occlusion B-like (SEOB) gene PbeSEOB1 were significantly inhibited. Transient expression of PbeXTH1 or PbeSEOB1 compromised the expressional induction of MbWAK1 and the resistance contributed by MbWAK1. In addition, PbeXTH1 and PbeSEOB1 suppressed the immune response induced by MbWAK1. Our results enriched the molecular mechanisms for MbWAK1 against Valsa canker and resistant breeding.

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