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《Molecular Plant Breeding》 2018-10
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Photosynthetic Physiological Response of Cabbage to Salt Stress

Xu Fenfen;Xu Peng;Hu Zhitao;Zhao Jing;Life Science College, Shangrao Normal University;  
This paper studied the photosynthetic characteristics of two cabbage varieties with different tolerance under salt stress, aiming to ascertain the photosynthetic physiological mechanisms of Chinese cabbage under the salt stress. The results showed that with the increase of NaCl concentration, the net photosynthetic rate,intercellular CO_2 concentration and the RUBPCase of two varieties of cabbage decreased gradually, and the stomatal limitation value increased gradually. Low NaCl concentration(0.5%) stress showed no significant effect on the photosynthetic parameters of two cabbage varieties. The Pn, Ci and AMC of salt-sensitive variety 'improvement605' were significantly inhibited(p0.01) under 1.0% NaCl stress. Pn of tolerant variety 'tetraploid Aijiaohuang' was significantly inhibited(p0.01), AMC was significantly inhibited(p0.05) and Ls was significantly promoted(p0.05) under 1.5% NaCl stress. It could clearly be seen that Ls and AMC were the main factors affecting the photosynthetic rate of cabbage under high concentration of salt stress. In addition, inhibition of the chlorophyll fluorescence parameters and synthesis and the activity of the optical system were also the major factors leading to the photosynthetic rate decline caused by salt stress.
【Fund】: 江西省教育厅科技项目(GJJ151055)资助
【CateGory Index】: S634.3
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