TaBZR1 enhances wheat salt tolerance via promoting ABA biosynthesis and ROS scavenging

文献类型： 外文期刊

第一作者： Yang, Ruizhen

作者： Yang, Ruizhen;Yang, Ziyi;Xing, Meng;Jing, Yexing;Zhang, Yunwei;Qiao, Weihua;Sun, Jiaqiang;Yang, Ruizhen;Zhao, Huixian;Xing, Meng;Qiao, Weihua;Zhang, Kewei;Zhou, Yun;Zhao, Huixian

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关键词： Wheat; TaBZR1; Salt stress; ABA; ROS

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：5.9； 五年影响因子：5.9 ）

ISSN： 1673-8527

年卷期： 2023 年 50 卷 11 期

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收录情况： SCI

摘要： Brassinosteroids (BRs) are vital plant steroid hormones involved in numerous aspects of plant life including growth, development, and responses to various stresses. However, the underlying mechanisms of how BR regulates abiotic stress responses in wheat (Triticum aestivum L.) remain to be elucidated. Here, we find that BR signal core transcription factor BRASSINAZOLE-RESISTANT1 (TaBZR1) is significantly upregulated by salt treatment. Overexpression of Tabzr1-1D (a gain-of-function TaBZR1 mutant protein) improves wheat salt tolerance. Furthermore, we show that TaBZR1 binds directly to the G-box motif in the promoter of ABA biosynthesis gene TaNCED3 to activate its expression and promotes ABA accumulation. Moreover, TaBZR1 associates with the promoters of ROS-scavenging genes TaGPX2 and TaGPX3 to activate their expression. Taken together, our results elucidate that TaBZR1 improves salt-stress tolerance by activating some genes involved in the biosynthesis of ABA and ROS scavenging in wheat, which gives us a new strategy to improve the salt tolerance of wheat.Copyright (c) 2023, The Authors. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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