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Int. J. Mol. Sci. 2017, 18(9), 1953;

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

Institute of Vegetables and Flowers, Shandong Academy of Agricultural Sciences, Shandong Key Laboratory of Greenhouse Vegetable Biology, Shandong Branch of National Vegetable Improvement Center, Jinan 250100, China
College of Life Science, Qufu Normal University, Qufu 273165, China
Authors to whom correspondence should be addressed.
Received: 27 July 2017 / Revised: 18 August 2017 / Accepted: 4 September 2017 / Published: 12 September 2017
(This article belongs to the Special Issue Abiotic Stress and Gene Networks in Plants 2017)
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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. View Full-Text
Keywords: Chinese cabbage; NaCl stress; physiological; transcriptomic; responses to salt treatment Chinese cabbage; NaCl stress; physiological; transcriptomic; responses to salt treatment

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Qiu, N.; Liu, Q.; Li, J.; Zhang, Y.; Wang, F.; Gao, J. Physiological and Transcriptomic Responses of Chinese Cabbage (Brassica rapa L. ssp. Pekinensis) to Salt Stress. Int. J. Mol. Sci. 2017, 18, 1953.

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