Regulation of the immunity-related VIK-APK-EDS1 pathway in Medicago for resistance to Phytophthora
文献类型： 外文期刊
作者： Liu, Li 1 ; Meng, Xiangzhao 1 ; Ye, Qinyi 1 ; Guo, Da 1 ; Zhao, Yafei 1 ; Cao, Na 1 ; Zheng, Lihua 1 ; Guo, Fei 1 ; Wen, Jiangqi 3 ; Niu, Yiding 5 ; Wang, Tao 1 ; Dong, Jiangli 1 ;
作者机构： 1.China Agr Univ, Coll Biol Sci, Beijing 100193, Peoples R China
2.Hebei Acad Agr & Forestry Sci, Inst Biotechnol & Food Sci, Shijiazhuang 050051, Peoples R China
3.Oklahoma State Univ, Inst Agr Biosci, Ardmore, OK 73401 USA
4.Oklahoma State Univ, Dept Plant & Soil Sci, Stillwater, OK 74078 USA
5.Inner Mongolia Univ, Coll Life Sci, Key Lab Forage & Endem Crop Biol, Minist Educ, Hohhot 010000, Peoples R China
期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.1 ）
ISSN： 1040-4651
年卷期： 2025 年 37 卷 7 期
页码：
收录情况： SCI
摘要： Root rot, induced by Phytophthora medicaginis, causes devastating damage to perennial alfalfa (Medicago sativa). However, the mechanism by which P. medicaginis infects Medicago remains elusive. Here, we identified the VASCULAR HIGHWAY 1-INTERACTING KINASE (VIK)-ANKYRIN PROTEIN KINASE (APK)-ENHANCED DISEASE SUSCEPTIBILITY 1 (EDS1) pathway during P. medicaginis infection in Medicago truncatula. MtAPK is an autoimmune gene, and Mtapk-mediated autoimmunity depends on MtEDS1. P. medicaginis infection triggers MtVIK to phosphorylate Ser20 of MtAPK, enhancing the interaction between MtAPK and MtEDS1 in the cytoplasm and constraining the nuclear resistance of MtEDS1. Disease resistance could be enhanced not only by knocking out MtVIK but also by the Ser20Ala site mutation of MtAPK. Interestingly, we found that alfalfa germplasms with lower MsVIK expression after inoculation with P. medicaginis exhibited greater disease resistance. Furthermore, CRISPR/Cas9 editing of MsVIK mutants in alfalfa resulted in stronger disease resistance without growth or yield penalties. Taken together, VIK is a negative regulator of Medicago immunity and has significant potential for cultivating durable resistance in crops through genetic modification. A MAPKKK kinase negatively regulates disease resistance by phosphorylating an autoimmune protein that then interacts with and constrains an immunity response protein in Medicago.
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