文献类型： 外文期刊
作者： Yuan, Shuilin 1 ; Hu, Die 1 ; Wang, Yuan 1 ; Shao, Cen 1 ; Liu, Tongkun 1 ; Zhang, Changwei 1 ; Cheng, Feng 3 ; Hou, Xilin 1 ; Li, Ying 1 ;
作者机构： 1.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Coll Hort, Nanjing 210095, Jiangsu, Peoples R China
2.Guangdong Acad Agr Sci, Tea Res Inst, Guangdong Key Lab Tea Plant Resources Innovat, Guangzhou 510640, Guangdong, Peoples R China
3.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Sino Dutch Joint Lab Hort Genom, Minist Agr,Key Lab Biol & Genet Improvement Hort, Beijing, Peoples R China
关键词： BcWRKY1; BcZAT12; Salt stress; pak-choi; BcsAPX; ROS
期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：4.335； 五年影响因子：5.197 ）
ISSN： 0167-4412
年卷期： 2022 年 109 卷 6 期
页码：
收录情况： SCI
摘要： WRKY transcription factors play important roles in abiotic stress by directly regulating stress-related genes. However, the molecular mechanism of its involvement in salt stress in pak-choi is still poorly understood. In this study, we elucidated the function of BcWRKY1 from pak-choi (Brassica rapa ssp. chinensis) in salt stress. The expression level of BcWRKY1 showed the highest in rosette leaves among different tissues and was induced by salt and ABA treatment in pak-choi. Subcellular localization showed that BcWRKY1 was located in nucleus. The transgenic Arabidopsis overexpressing BcWRKY1 exhibited enhanced salt sensitivity and higher H2O2 contents, which were further confirmed by silencing BcWRKY1 in pak-choi. In addition, the expression of ZAT12 was negatively regulated with BcWRKY1 under salt stress both in pak-choi and Arabidopsis. Yeast one-hybrid and dual luciferase reporter assay showed that BcWRKY1 could bind to the promoter of BcZAT12, and BcsAPX expression was activated by BcZAT12. To sum up, we propose a BcWRKY1-BcZAT12-BcsAPX regulatory model that involves in pak-choi salt stress response. Key message BcWRKY1 repress the expression of BcZAT12 to inhibit reactive oxygen species scavenging, leading to enhanced salt tolerance in BcWRKY1 silencing pak-choi.
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