Function of the auxin-responsive gene TaSAUR75 under salt and drought stress

Crop Journal

Shoujin Fan¹  Hui Zhang²  Zheng Hu²  Xianjun Sun²  Qiyan Jiang²  Yuan Guo² 

[1] College of Life Science, Shandong Normal University, Jinan 250014, Shandong, China;Institute of Crop Science, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing 100081, China;

关键词: TaSAUR75;    Drought;    Salt;    ROS;    Wheat;    Arabidopsis;   

DOI  :  10.1016/j.cj.2017.08.005

来源: DOAJ

【 摘 要 】

Small auxin-upregulated RNAs (SAURs) are genes regulated by auxin and environmental factors. In this study, we identified a SAUR gene in wheat, TaSAUR75. Under salt stress, TaSAUR75 is downregulated in wheat roots. Subcellular localization revealed that TaSAUR75 was localized in both the cytoplasm and nucleus. Overexpression of TaSAUR75 increased drought and salt tolerance in Arabidopsis. Transgenic lines showed higher root length and survival rate and higher expression of some stress-responsive genes than control plants under salt and drought stress. Less H2O2 accumulated in transgenic lines than in control plants under drought stress. Our findings reveal a positive regulatory role of the auxin-responsive gene TaSAUR75 in plant responses to drought and salt stress and provide a candidate gene for improvement of abiotic stress tolerance in crop breeding.

【 授权许可】

Unknown