文献类型： 外文期刊
作者： Li Lin;Xingrui Zhang;Jialin Fan;Jiawei Li;Sichao Ren;Xin Gu;Panpan Li;Meiling Xu;Jingyi Xu;Wenjing Lei;Dongxiao Liu;Qinfu Sun;Guangqin Cai;Qing Yong Yang;Youping Wang;Jian Wu
作者机构：
期刊名称： Nature Communications
ISSN： 2041-1723
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCIE（2024版）
摘要： Sclerotinia stem rot (SSR), caused by the necrotrophic fungus Sclerotinia sclerotiorum, is one of the most devastating diseases for several major oil-producing crops. Despite its impact, the genetic basis of SSR resistance in plants remains poorly understood. Here, through a genome-wide association study, we identify a key gene, BnaA07. MKK9, that encodes a mitogen-activated protein kinase kinase that confers SSR resistance in oilseed rape. Our functional analyses reveal that BnaA07.MKK9 interacts with BnaC03.MPK3 and BnaC03.MPK6 and phosphorylates them at the TEY activation motif, triggering a signaling cascade that initiates biosynthesis of ethylene, camalexin, and indole glucosinolates, and promotes accumulation of H2O2 and the hypersensitive response, ultimately conferring resistance. Furthermore, variations in the coding sequence of BnaA07.MKK9 alter its kinase activity and improve SSR resistance by ~30% in cultivars carrying the advantageous haplotype. These findings enhance our understanding of SSR resistance and may help engineer novel diversity for future breeding of oilseed rape.
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