DISTRIBUTION OF POLYPHENOLS IN TEA PLANT (CAMELLIA SINENSIS L)
DISTRIBUTION OF POLYPHENOLS IN TEA PLANT (CAMELLIA SINENSIS L)
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DOI：
10.1042/bj1130741
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发表时间：
1969-01-01
影响因子：
4.1
通讯作者：
BENDALL, DS
中科院分区：
文献类型：
--
作者：
FORREST, GI;BENDALL, DS
1.建立了茶树多酚成分的薄层色谱和比色反应分离测定方法。2.高浓度的儿茶素、黄酮醇和多酚类物质仅存在于幼嫩的营养枝条和花芽中，而亮色花青素或黄素则是植株较大的中轴组织的特征。3.在幼嫩枝条中，细胞生长与黄酮类B-环羟化程度的增加有关。4.茎和种皮的外层保护层中的黄原素含量最高。5.成熟叶片中含有黄酮类化合物芹菜素和木犀草素。6.幼苗发育过程中，多酚类物质的复杂性逐渐增加，黄素类物质主要集中在地上部和根尖，并在茎基部积累。7.据推测，黄烷醇(亮色花青素和儿茶素)，因为它们可以共聚，对植物具有保护木材和树皮免受感染和腐烂的作用。
1. Methods for the separation and determination of the polyphenolic components of the tea plant by thin-layer chromatography and colorimetric reactions have been devised. 2. High concentrations of catechins, flavonols and depsides were found to be restricted to the young vegetative and floral shoots, whereas leucoanthocyanins or flavylogens were characteristic of the more bulky axial tissues of the plant. 3. In the young shoots cell growth was correlated with an increasing degree of flavonoid B-ring hydroxylation. 4. Maximal flavylogen concentrations occurred in the outer protective layers of stem and of seed coat. 5. Mature leaves were shown to contain derivatives of the flavones apigenin and luteolin. 6. Developing seedlings showed a steady increase in polyphenol complexity; flavylogens were concentrated at shoot and root apices and accumulated at the stem base. 7. It is postulated that the flavanols (leucoanthocyanins and catechins), because they can co-polymerize, are of use to the plant for protection of wood and bark against infection and decay.