The role of the MAP kinase−kinase protein StMKK1 in potato immunity to different pathogens  

作　　者：Xiaokang Chen Wenbin Wang Pingping Cai Ziwei Wang Tingting Li Yu Du 

机构地区：[1]College of Horticulture,Northwest A&F University and Shaanxi Engineering Research Center for Vegetables,Yangling,Shaanxi 712100,China

出　　处：《Horticulture Research》2021年第1期1915-1923,共9页园艺研究（英文）

基　　金：This work was financed by the National Natural Science Foundation of China(31701770,32072401);the China Postdoctoral Science Foundation(2019T120956 and 2016M600818);the Postdoctoral Science Foundation of Shaanxi Province(2017BSHYDZZ63);the Northwest A&F University Scientific Research Fund for Advanced Talents(2452018028 and 2452017069).

摘　　要：Mitogen-activated protein kinase(MAPK)cascades play important roles in plant immunity.Previously,we reported that the potato StMKK1 protein negatively regulates Nicotiana benthamiana resistance to Phytophthora infestans.However,the functions of StMKK1 in potato immunity are unknown.To investigate the roles of StMKK1 in potato resistance to different pathogens,such as the potato late-blight pathogen P.infestans,the bacterial wilt pathogen Ralstonia solanacearum,and the gray-mold fungal pathogen Botrytis cinerea,we generated StMKK1 transgenic lines and investigated the response of potato transformants to destructive oomycete,bacterial,and fungal pathogens.The results showed that overexpression and silencing of StMKK1 do not alter plant growth and development.Interestingly,we found that StMKK1 negatively regulated potato resistance to the hemibiotrophic/biotrophic pathogens P.infestans and R.solanacearum,while it positively regulated potato resistance to the necrotrophic pathogen B.cinerea.Further investigation showed that overexpression of StMKK1 suppressed potato pathogen-associated molecular pattern(PAMP)-triggered immunity(PTI)and salicylic acid(SA)-related responses,while silencing of StMKK1 enhanced PTI and SA-related immune responses.Taken together,our results showed that StMKK1 plays dual roles in potato defense against different plant pathogens via negative regulation of PTI and SA-related signaling pathways.

关 键 词：blight IMMUNITY PATHOGENS 

分 类 号：S532[农业科学—作物学]