Physiological and Transcriptomic Responses of Chinese Cabbage (Brassica rapa L. ssp Pekinensis) to Salt Stress

文献类型： 外文期刊

第一作者： Qiu, Nianwei

作者： Qiu, Nianwei;Li, Jingjuan;Zhang, Yihui;Wang, Fengde;Gao, Jianwei;Qiu, Nianwei;Liu, Qian

作者机构：

关键词： Chinese cabbage;NaCl stress;physiological;transcriptomic;responses to salt treatment

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN： 1422-0067

年卷期： 2017 年 18 卷 9 期

页码：

收录情况： SCI

摘要： Salt stress is one of the major abiotic stresses that severely impact plant growth and development. In this study, we investigated the physiological and transcriptomic responses of Chinese cabbage Qingmaye to salt stress, a main variety in North China. Our results showed that the growth and photosynthesis of Chinese cabbage were significantly inhibited by salt treatment. However, as a glycophyte, Chinese cabbage could cope with high salinity; it could complete an entire life cycle at 100 mM NaCl. The high salt tolerance of Chinese cabbage was achieved by accumulating osmoprotectants and by maintaining higher activity of antioxidant enzymes. Transcriptomic responses were analyzed using the digital gene expression profiling (DGE) technique after 12 h of treatment by 200 mM NaCl. A total of 1235 differentially expressed genes (DEGs) including 740 up- and 495 down-regulated genes were identified. Functional annotation analyses showed that the DEGs were related to signal transduction, osmolyte synthesis, transcription factors, and antioxidant proteins. Taken together, this study contributes to our understanding of the mechanism of salt tolerance in Chinese cabbage and provides valuable information for further improvement of salt tolerance in Chinese cabbage breeding programs.

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