Overexpression of the rice gene OsSIZ1 in Arabidopsis improves drought-, heat-, and salt-tolerance simultaneously
文献类型： 外文期刊
作者： Mishra, Neelam 1 ; Srivastava, Anurag P. 4 ; Esmaeili, Nardana 2 ; Hu, Wenjun 1 ; Shen, Guoxin 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Hangzhou, Zhejiang, Peoples R China
2.Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409 USA
3.St Josephs Coll, Dept Bot, Bangalore, Karnataka, India
4.Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2018 年 13 卷 8 期
页码：
收录情况： SCI
摘要： Sumoylation is one of the post translational modifications, which affects cellular processes in plants through conjugation of small ubiquitin like modifier (SUMO) to target substrate proteins. Response to various abiotic environmental stresses is one of the major cellular functions regulated by SUMO conjugation. SIZ1 is a SUMO E3 ligase, facilitating a vital step in the sumoylation pathway. In this report, it is demonstrated that over-expression of the rice gene OsSIZ1 in Arabidopsis leads to increased tolerance to multiple abiotic stresses. For example, OsSIZ1-overexpressing plants exhibited enhanced tolerance to salt, drought, and heat stresses, and generated greater seed yields under a variety of stress conditions. Furthermore, OsSIZ1-overexpressing plants were able to exclude sodium ions more efficiently when grown in saline soils and accumulate higher potassium ions as compared to wild-type plants. Further analysis revealed that OsSIZ1-overexpressing plants expressed higher transcript levels of P5CS, a gene involved in the biosynthesis of proline, under both salt and drought stress conditions. Therefore, proline here is acting as an osmoprotectant to alleviate damages caused by drought and salt stresses. These results demonstrate that the rice gene OsSIZ1 has a great potential to be used for improving crop's tolerance to several abiotic stresses.
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