ABI-like transcription factor gene TaABL1 from wheat improves multiple abiotic stress tolerances in transgenic plants

文献类型： 外文期刊

第一作者： Xu, Dong-Bei

作者： Xu, Dong-Bei;Li, Xue-Yin;Chen, Yao-Feng;Gao, Shi-Qing;Ma, You-Zhi;Xu, Zhao-Shi;Li, Lian-Cheng;Chen, Ming;Gao, Shi-Qing;Zhao, Chang-Ping;Tang, Yi-Miao;Li, Xue-Yin

作者机构：

关键词： Triticum aestivum L.;bZIP transcription factor;ABA;Drought;High salt;Low temperature

期刊名称：FUNCTIONAL & INTEGRATIVE GENOMICS （ 影响因子：3.41； 五年影响因子：3.616 ）

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收录情况： SCI

摘要： The phytohormone abscisic acid (ABA) plays crucial roles in adaptive responses of plants to abiotic stresses. ABA-responsive element binding proteins (AREBs) are basic leucine zipper transcription factors that regulate the expression of downstream genes containing ABA-responsive elements (ABREs) in promoter regions. A novel ABI-like (ABA-insensitive) transcription factor gene, named TaABL1, containing a conserved basic leucine zipper (bZIP) domain was cloned from wheat. Southern blotting showed that three copies were present in the wheat genome. Phylogenetic analyses indicated that TaABL1 belonged to the AREB subfamily of the bZIP transcription factor family and was most closely related to ZmABI5 in maize and OsAREB2 in rice. Expression of TaABL1 was highly induced in wheat roots, stems, and leaves by ABA, drought, high salt, and low temperature stresses. TaABL1 was localized inside the nuclei of transformed wheat mesophyll protoplast. Overexpression of TaABL1 enhanced responses of transgenic plants to ABA and hastened stomatal closure under stress, thereby improving tolerance to multiple abiotic stresses. Furthermore, overexpression of TaABL1 upregulated or downregulated the expression of some stress-related genes controlling stomatal closure in transgenic plants under ABA and drought stress conditions, suggesting that TaABL1 might be a valuable genetic resource for transgenic molecular breeding.

分类号： Q78

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