BREVIPEDICELLUS Positively Regulates Salt-Stress Tolerance in Arabidopsis thaliana

文献类型： 外文期刊

第一作者： Cai, Huixian

作者： Cai, Huixian;Yan, Kang;Zhang, Shizhong;Yang, Guodong;Wu, Changai;Zheng, Chengchao;Huang, Jinguang;Xu, Yang

作者机构：

关键词： arabidopsis thaliana; salt stress; BREVIPEDICELLUS; XTH7; xyloglucan

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 24 卷 2 期

页码：

收录情况： SCI

摘要： Salt stress is one of the major environmental threats to plant growth and development. However, the mechanisms of plants responding to salt stress are not fully understood. Through genetic screening, we identified and characterized a salt-sensitive mutant, ses5 (sensitive to salt 5), in Arabidopsis thaliana. Positional cloning revealed that the decreased salt-tolerance of ses5 was caused by a mutation in the transcription factor BP (BREVIPEDICELLUS). BP regulates various developmental processes in plants. However, the biological function of BP in abiotic stress-signaling and tolerance are still not clear. Compared with wild-type plants, the bp mutant exhibited a much shorter primary-root and lower survival rate under salt treatment, while the BP overexpressors were more tolerant. Further analysis showed that BP could directly bind to the promoter of XTH7 (xyloglucan endotransglucosylase/hydrolase 7) and activate its expression. Resembling the bp mutant, the disruption of XTH7 gave rise to salt sensitivity. These results uncovered novel roles of BP in positively modulating salt-stress tolerance, and illustrated a putative working mechanism.

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