期刊
PHOTOSYNTHETICA
卷 49, 期 4, 页码 515-522出版社
SPRINGER
DOI: 10.1007/s11099-011-0061-8
关键词
anthocyanins; chlorophyll fluorescence; Cornus sanguinea; Parthenocissus quinquefolia; photoinhibition; photoprotection; senescence
Fully exposed, senescing leaves of Cornus sanguinea and Parthenocissus quinquefolia display during autumn considerable variation in both anthocyanin and chlorophyll (Chl) concentrations. They were used in this study to test the hypothesis that anthocyanins may have a photoprotective function against photosystem II (PSII) photoinhibitory damage. The hypothesis could not be confirmed with field sampled leaves since maximum photochemical efficiency (F(v)/F(m)) of PSII was negatively correlated to anthocyanin concentration and the possible effects of anthocyanins were also confounded by a decrease in F(v)/F(m) with Chl loss. However, after short-term laboratory photoinhibitory trials, the percent decrease of F(v)/F(m) was independent of Chl concentration. In this case, a slight alleviation of PSII damage with increasing anthocyanins was observed in P. quinquefolia, while a similar trend in C. sanguinea was not statistically significant. It is inferred that the assumed photoprotection, if addressed to PSII, may be of limited advantage and only under adverse environmental conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据