Inhibition of the maize salt overly sensitive pathway by ZmSK3 and ZmSK4
作者机构：State Key Laboratory of Plant Environmental ResilienceCollege of Biological SciencesChina Agricultural UniversityBeijing 100193China College of Life SciencesQingdao Agricultural UniversityQingdaoShandong 266109China Center for Crop Functional Genomics and Molecular BreedingChina Agricultural UniversityBeijing 100093China National Maize Improvement Center of ChinaChina Agricultural UniversityBeijing 100193China
出 版 物：《Journal of Genetics and Genomics》 (遗传学报（英文版）)
年 卷 期：2023年第50卷第12期
页 面：960-970页
核心收录：
学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 100701[医学-药物化学] 10[医学]
基 金：This work was supported by grants from the National Key R&D Program of China(2022YFF1001601 and 2022YFA1303400) supported by grants from the National Natural Science Foundation of China(32100234 and 31921001)
主 题：Salt stress Maize SOS pathway ZmSK3 ZmSK4 ZmSCaBP8
摘 要：Soil salinity is a worldwide problem that adversely affects plant growth and crop productivity. The salt overly sensitive (SOS) pathway is evolutionarily conserved and essential for plant salt tolerance. In this study, we reveal how the maize shaggy/glycogen synthase kinase 3-like kinases ZmSK3 and ZmSK4, orthologs of brassinosteroid insensitive 2 in Arabidopsis thaliana, regulate the maize SOS pathway. ZmSK3 and ZmSK4 interact with and phosphorylate ZmSOS2, a core member of the maize SOS pathway. The mutants defective in ZmSK3 or ZmSK4 are hyposensitive to salt stress, with higher salt-induced activity of ZmSOS2 than that in the wild type. Furthermore, the Ca^(2+) sensors ZmSOS3 and ZmSOS3-like calcium binding protein 8 (ZmSCaBP8) activate ZmSOS2 to maintain Na^(+)/K^(+) homeostasis under salt stress and may participate in the regulation of ZmSOS2 by ZmSK3 and ZmSK4. These findings discover the regulation of the maize SOS pathway and provide important gene targets for breeding salt-tolerant maize.
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