BES/BZR Transcription Factor TaBZR2 Positively Regulates Drought Responses by Activation of TaGST1
文献类型： 外文期刊
作者： Cui, Xiao-Yu 1 ; Gao, Yuan 1 ; Guo, Jun 2 ; Yu, Tai-Fei 1 ; Zheng, Wei-Jun 2 ; Liu, Yong-Wei 3 ; Chen, Jun 1 ; Xu, Zhao-S 1 ;
作者机构： 1.Chinese Acad Agr Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Key Lab Biol & Genet Improvement Triticeae Crops, Inst Crop Sci,Minist Agr, Beijing 100081, Peoples R China
2.Northwest A&F Univ, Coll Agron, Coll Plant Protect, Yangling 712100, Shaanxi, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Plant Genet Engn Ctr Hebei Prov, Inst Genet & Physiol, Shijiazhuang 050051, Hebei, Peoples R China
4.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Shandong, Peoples R China
期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.34； 五年影响因子：8.972 ）
ISSN： 0032-0889
年卷期： 2019 年 180 卷 1 期
页码：
收录情况： SCI
摘要： BRI1-EMS suppressor (BES)/brassinazole-resistant (BZR) family transcription factors are involved in a variety of physiological processes, but the biological functions of some BES/BZR transcription factors remain unknown; moreover, it is not clear if any of these proteins function in the regulation of plant stress responses. Here, wheat (Triticum aestivum) brassinazole-resistant 2 (TaBZR2)-overexpressing plants exhibited drought tolerant phenotypes, whereas downregulation of TaBZR2 in wheat by RNA interference resulted in elevated drought sensitivity. electrophoretic mobility shift assay and luciferase reporter analysis illustrate that TaBZR2 directly interacts with the gene promoter to activate the expression of T. aestivum glutathione s-transferase-1 (TaGST1), which functions positively in scavenging drought-induced superoxide anions (O-2(-) ). Moreover, TaBZR2 acts as a positive regulator in brassinosteroid (BR) signaling. Exogenous BR treatment enhanced TaBZR2-mediated O-2(-) - scavenging and antioxidant enzyme gene expression. Taken together, we demonstrate that a BES/BZR family transcription factor, TaBZR2, functions positively in drought responses by activating TaGST1 and mediates the crosstalk between BR and drought signaling pathways. Our results thus provide new insights into the mechanisms underlying how BES/BZR family transcription factors contribute to drought tolerance in wheat.
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