An LRR-RLK protein modulates drought-and salt-stress responses in maize  

作　　者：Zhirui Yang Chen Wang Tengfei Zhu Jiafan He Yijie Wang Shiping Yang Yu Liu Bochen Zhao Chaohui Zhu Shuqing Ye Limei Chen Shengxue Liu Feng Qin 

机构地区：[1]Frontiers Science Center for Molecular Design Breeding(MOE),State Key Laboratory of Plant Environmental Resilience,Center for Crop Functional Genomics and Molecular Breeding,College of Biological Sciences,China Agricultural University,Beijing 100193,China

出　　处：《Journal of Genetics and Genomics》2025年第3期388-399,共12页遗传学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(2021YFD1200703 and 2022YFF1001602);the National Science Foundation of China(32272024 and 32171940);the Pinduoduo-China Agricultural University Research Fund(PC2023B01001);the Chinese Universities Scientific Fund(2022TC142);the 2115 Talent Development Program of China Agricultural University。

摘　　要：Maize(Zea mays),which is a vital source of food,feed,and energy feedstock globally,has significant potential for higher yields.However,environmental stress conditions,including drought and salt stress,severely restrict maize plant growth and development,leading to great yield losses.Leucine-rich repeat receptor-like kinases(LRR-RLKs)function in biotic and abiotic stress responses in the model plant Arabidopsis(Arabidopsis thaliana),but their roles in abiotic stress responses in maize are not entirely understood.In this study,we determine that the LRR-RLK ZmMIK2,a homolog of the Arabidopsis LRR-RK MALE DISCOVERER 1(MDIS1)-INTERACTING RECEPTOR LIKE KINASE 2(MIK2),functions in resistance to both drought and salt stress in maize.Zmmik2 plants exhibit enhanced resistance to both stresses,whereas overexpressing ZmMIK2 confers the opposite phenotypes.Furthermore,we identify C2-DOMAIN-CONTAINING PROTEIN 1(ZmC2DP1),which interacts with the intracellular region of ZmMIK2.Notably,that region of ZmMIK2 mediates the phosphorylation of ZmC2DP1,likely by increasing its stability.Both ZmMIK2 and ZmC2DP1 are mainly expressed in roots.As with ZmMIK2,knockout of ZmC2DP1 enhances resistance to both drought and salt stress.We conclude that ZmMIK2-ZmC2DP1 acts as a negative regulatory module in maize drought-and salt-stress responses.

关 键 词：MAIZE LRR-RLK protein C2-domain containing protein DROUGHT Salt stress 

分 类 号：S513[农业科学—作物学]