Effects of drought stress on physiology and antioxidative activity in two varieties of Cynanchum thesioides
文献类型： 外文期刊
第一作者： Zhang, Xiaoyan
作者： Zhang, Xiaoyan;Yang, Zhongren;Zhang, Fenglan;Hao, Lizhen;Li, Zhi
作者机构：
关键词： Antioxidase system; Drought stress; Osmotic adjustment; Physiological response
期刊名称：BRAZILIAN JOURNAL OF BOTANY （ 影响因子：1.296； 五年影响因子：1.394 ）
ISSN： 0100-8404
年卷期： 2020 年 43 卷 1 期
页码：
收录情况： SCI
摘要： Cynanchum thesioides (Freyn) K. Schum. with higher drought tolerance has received much research attention in arid and semiarid areas of China. However, no full evaluation of drought resistance had been made. In the current study, we compared relative water content, water saturation deficit, root vitality, root-cap ratio, photosynthetic pigments and ten physiological indices in C. thesioides and C. thesioides (Freyn) K. Schum. var. australe (Maxim.) Tsiang et P.T. Li. seedlings under a gradient of drought stress. The ten indices included superoxide dismutase, peroxidase, catalase, ascorbate peroxidase and malondialdehyde, hydrogen peroxide, superoxide, proline, soluble protein and sugar content of leaves and roots. Based on the analysis of average membership functional values, the drought tolerance of C. thesioides var. australe was better than C. thesioides. In the future, C. thesioides var. australe should be given priority when selecting varieties for use as medicines in arid and semiarid areas of China.
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