The Malectin-like kinase gene MdMDS1 negatively regulates the resistance of Pyrus betulifolia to Valsa canker by promoting the expression of PbePME1
文献类型： 外文期刊
作者： Zheng, Yan 1 ; Zhao, Dan 1 ; Lu, Yuan 1 ; Chen, Zhongjian 2 ; Liu, Zhihong 1 ; Sun, E. 1 ; Yu, Hongqiang 1 ; Mao, Xia 1 ; Cai, Minrui 1 ; Zuo, Cunwu 1 ;
作者机构： 1.Gansu Agr Univ, Coll Hort, Lanzhou, Peoples R China
2.Guangdong Acad Agr Sci, AgroBiol Gene Res Ctr, Guangzhou, Peoples R China
3.State Key Lab Aridland Crop Sci, Lanzhou, Peoples R China
期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：3.6； 五年影响因子：5.4 ）
ISSN： 0031-9317
年卷期： 2025 年 177 卷 1 期
页码：
收录情况： SCI
摘要： Valsa canker, caused by fungal pathogens in Valsa species, is a fungal disease of apple and pear growing in China and even in Asia. Malectin-like kinases play crucial roles in plant recognition of the pathogen-induced signals and subsequent activation of partially host immune responses. However, the role of MEDOS1 (MDS1), a Malectin-like kinase, in plant immunity has not yet been extensively explored. Here, we found that the expression of the Malus domestica MDS (MdMDS1) gene, a homologous gene of the Catharanthus roseus Receptor-Like Kinase 1-like (CrRLK1L) family member MDS1 in Arabidopsis, could be inhibited by Valsa canker signals. Over-expression of MdMDS1 decreased Valsa canker resistance of apple and pear fruits, as well as 'Duli-G03' (Pyrus betulifolia) suspension cells. In response to Valsa pyri (Vp) signals in suspension cells, the up-regulation of MdMDS1 caused the inhibition of defense-related genes but activated the expression of cell wall-related genes. Among these, the pectin methylesterase gene PbePME1 was robustly induced. Further analysis confirmed that PbePME1, a negative regulator of Valsa canker resistance, was indispensable for MdMDS1's function. Our results enriched the recognization of the functions of CrRLK1L genes in host resistance against necrotrophics. We also provided a theoretical reference for the resistance breeding and comprehensive control of Valsa canker in both apples and pears.
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