Seasonal variations in group leaf characteristics in species with red young leaves
Seasonal variations in group leaf characteristics in species with red young leaves
复制标题
红幼叶物种群叶特征的季节变化
DOI：
10.1038/s41598-019-52753-x
复制
发表时间：
2019-11
影响因子：
4.6
通讯作者：
Peng Chang Lian
中科院分区：
文献类型：
--
作者：
Zhang Tai Jie;Tian Xing Shan;Liu Xiao Tao;Huang Xuan Dong;Peng Chang Lian
许多植物的叶子在其生命的特定阶段是红色的，但是叶子颜色的适应意义还没有被清楚地理解。为了揭示花青素在不同季节是否发挥相似的作用（即抗氧化），本研究对鼎湖山亚热带森林中具有红色嫩叶的物种在夏季和冬季进行了调查，并比较了两个季节的组叶特征。在62种植物中，33种仅在夏季出现红色嫩叶，6种仅在冬季出现，23种在两个季节都出现。大部分植物的花色苷在~530 nm处有吸收峰。频率分布分析表明，花色苷含量在0.02 ~ 0.04 μmol cm-2范围内的种类主要出现在夏季或冬季。根据物种的条件分组，没有观察到的平均花色苷含量和抗氧化能力的夏季和冬季之间的显着变化，夏季的黄酮含量是2倍，而花色苷：黄酮的比例在夏季只有一半，在冬季。夏季花色素苷与黄酮含量呈正相关。因此，花青素在夏天比冬天更不可能作为抗氧化剂，因为夏天叶子中的这种功能很容易被其他类黄酮取代。
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 ~530 nm. Frequency distribution analysis showed that the species containing anthocyanins at levels ranging from 0.02 to 0.04 μmol cm−2occurred 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.
登录
查看更多内容
DOI：
10.1071/pp00112
发表时间：
2001-05
期刊：
Australian Journal of Plant Physiology
影响因子：
--
作者：
D. Close;N. Davies;C. Beadle
通讯作者：
D. Close;N. Davies;C. Beadle
影响因子：
2.6
作者：
Elsheery, Nabil I.;Cao, Kun-Fang
通讯作者：
Cao, Kun-Fang
影响因子：
4.3
作者：
Lars Nichelmann;W. Bilger
通讯作者：
Lars Nichelmann;W. Bilger
影响因子：
5.2
作者：
K. Zhang;H. Yu;K. Shi;Yanhong Zhou;Jingquan Yu;X. Xia
通讯作者：
K. Zhang;H. Yu;K. Shi;Yanhong Zhou;Jingquan Yu;X. Xia
影响因子：
6.1
作者：
Heimler, D;Vignolini, P;Romani, A
通讯作者：
Romani, A