Functional role of anthocyanins in the leaves of Quintinia serrata A. Cunn.
Functional role of anthocyanins in the leaves of Quintinia serrata A. Cunn.
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DOI：
10.1093/jexbot/51.347.1107
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发表时间：
2000-06-01
影响因子：
6.9
通讯作者：
Goris, JJ
中科院分区：
文献类型：
--
作者：
Gould, KS;Markham, KR;Goris, JJ
许多其他化合物也可以有效地发挥叶子中花青素的保护功能。已经测试了花青素在缺乏其他植物保护色素的叶子中积累最丰富的可能性。对来自锯齿昆汀 (Quintinia serrata) 森林种群的 1000 片叶子样本进行了调查，该样本在叶子颜色方面表现出天然的多态性。根据其红色着色模式识别了八种叶子表型。在每种叶子组织的几乎所有组合中都观察到花青素，但最常见的是位于光合细胞的液泡中。红叶含有两种花青素（Cy-3-glc 和 Cy-3-gal）、表皮黄酮、表皮黄酮醇、羟基肉桂酸、叶绿素和类胡萝卜素。绿叶缺乏花青素，但在其他方面具有相似的色素特征。叶面花青素水平在树枝之间和树木之间存在显着差异，但与其他色素的浓度不相关。朝南缺口的树冠下的老叶子中花青素含量最高。这些数据表明花青素与光合作用有关，但不起到辅助植物保护作用。它们可以保护适应遮荫的叶绿体免受短暂暴露于高强度阳光照射的影响。
The protective functions that have been ascribed to anthocyanins in leaves can be performed as effectively by a number of other compounds. The possibility that anthocyanins accumulate most abundantly in leaves deficient in other phytoprotective pigments has been tested. Pigment concentrations and their histological distribution were surveyed for a sample of 1000 leaves from a forest population of Quintinia serrata, which displays natural polymorphism in leaf colour. Eight leaf phenotypes were recognized according to their patterns of red coloration. Anthocyanins were observed in almost all combinations of every leaf tissue, but were most commonly located in the vacuoles of photo-synthetic cells. Red leaves contained two anthocyanins (Cy-3-glc and Cy-3-gal), epicuticular flavones, epidermal flavonols, hydroxycinnamic acids, chlorophylls, and carotenoids, Green leaves lacked anthocyanins, but had otherwise similar pigment profiles. Foliar anthocyanin levels varied significantly between branches and among trees, but were not correlated to concentrations of other pigments. Anthocyanins were most abundant in older leaves on trees under canopies with south-facing gaps. These data indicate that anthocyanins are associated with photosynthesis, but do not serve an auxiliary phytoprotective role. They may serve to protect shade-adapted chloroplasts from brief exposure to high intensity sunflecks.