期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 127, 期 -, 页码 336-342出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2018.04.007
关键词
Abiotic stress; Cabbage; Chloroplast; DEAD-box; RNA chaperone; RNA helicase
资金
- Next Generation BioGreen21 Program, Rural Development Administration, Republic of Korea [PJ01312201]
- Mid-career Researcher Program through National Research Foundation of Korea - Ministry of Science, ICT, and Future Planning, Republic of Korea [NRF-2016R1A2B4009172]
Although the roles of many DEAD-box RNA helicases (RHs) have been determined in the nucleus as well as in cytoplasm during stress responses, the importance of chloroplast-targeted DEAD-box RHs in stress response remains largely unknown. In this study, we determined the function of BrRH22, a chloroplast-targeted DEADbox RH in cabbage (Brassica rapa), in abiotic stress responses. The expression of BrRH22 was markedly increased by drought, heat, salt, or cold stress and by ABA treatment, but was largely decreased by UV stress. Expression of BrRH22 in Arabidopsis enhanced germination and plantlet growth under high salinity or drought stress. BrRH22-expressing plants displayed a higher cotyledon greening and better plantlet growth upon ABA treatment due to decreases in the levels of ABI3, ABI4, and ABI5. Further, BrRH22 affected translation of several chloroplast transcripts under stress. Notably, BrRH22 had RNA chaperone function. These results altogether suggest that chloroplast-transported BrRH22 contributes positively to the response of transgenic Arabidopsis to abiotic stress by affecting translation of chloroplast genes via its RNA chaperone activity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据