文献类型: 外文期刊
作者: Zhang, Tai-Jie 1 ; Tian, Xing-Shan 1 ; Liu, Xiao-Tao 2 ; Huang, Xuan-Dong 2 ; Peng, Chang-Lian 2 ;
作者机构: 1.Guangdong Acad Agr Sci, Inst Plant Protect, Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Guangdong, Peoples R China
2.South China Normal Univ, Guangdong Prov Key Lab Biotechnol Plant Dev, Sch Life Sci, Guangzhou Key Lab Subtrop Biodivers & Biomonitori, Guangzhou 510631, Guangdong, Peoples R China
期刊名称:SCIENTIFIC REPORTS ( 2020影响因子:4.379; 五年影响因子:5.133 )
ISSN: 2045-2322
年卷期: 2019 年 9 卷
收录情况: SCI
摘要: The leaves of many plants are red during particular stages of their lives, but the adaptive significance of leaf colouration is not yet clearly understood. In order to reveal whether anthocyanins play a similar role (i.e. antioxidants) in different seasonal contexts, this study investigated species with red young leaves in the subtropical forest of Dinghushan biosphere reserve (South China) during summer and winter and compared group leaf characteristics between the two seasons. Of 62 total species, 33 exhibited red young leaves in summer only, 6 in winter only, and 23 in both seasons. The anthocyanins extracted from most of these species had an absorption peak at similar to 530 nm. Frequency distribution analysis showed that the species containing anthocyanins at levels ranging from 0.02 to 0.04 mu mol cm(-2) occurred most frequently in summer or winter. Based on conditional grouping of the species, no significant variation was observed in the average anthocyanin contents and antioxidant abilities between summer and winter; the flavonoid content in summer was 2-fold that in winter, whereas the anthocyanin:flavonoid ratio in summer was only half that in winter. Moreover, a positive correlation between anthocyanins and flavonoids was found in summer. Therefore, it is less likely for anthocyanins to serve as antioxidants in summer than winter, because such a function in summer leaves is readily replaced by other flavonoids.
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