Photooxidation Tolerance Characters of a New Purple Pepper

文献类型： 外文期刊

第一作者： Zhang, Zhu-qing

作者： Zhang, Zhu-qing;Dai, Xiong-ze;Zou, Xue-xiao;Ou, Li-jun;Ou, Li-jun

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2013 年 8 卷 5 期

页码：

收录情况： SCI

摘要： Huai Zi (HZ) is a new purple mutant of green pepper (PI 631133) that is obtained from the United States Department of Agriculture. The net photosynthetic rate (P-N), chlorophyll fluorescence parameters, antioxidant substances, antioxidant enzymes, photosystem 1 (PS1) and PS2 activities were studied through methyl viologen (MV) treatment. The results showed that the P-N, actual photochemical efficiency of PS2 (Phi PS2), photochemical quenching coefficient (q(P)), PS1 and PS2 activities in HZ were lower than those in green pepper. HZ had a stronger ability to eliminate reactive oxygen species(O-2(center dot-)) and accumulated less malondialdehyde (MDA) (a membrane lipid peroxidation product) than did green pepper, and had a higher content of antioxidants and antioxidant enzyme activity. This suggests that the lower light energy absorption and higher thermal dissipation and antioxidant activity of HZ contributed to a more stable PS2 photosynthetic capacity, which resulted in photooxidation tolerance. Hence, our study strongly suggests that pepper hybrids can achieve a modest ratio of chlorophyll and anthocyanin content, high P-N and resistance to photooxidation, improving yield and resistance to adverse environments.

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