7种金花茶组植物叶片营养成分分析

为选育金花茶优良品种，以7种金花茶组(Camellia sect. Chrysantha)植物成熟叶片为试材，对其总黄酮、茶多酚、总多糖、总皂苷、总氨基酸及维生素E等6种营养物质及K、Ca、Na、Fe、Mn、Zn、Se等7种矿质元素含量进行测定比较，通过聚类分析，考查不同金花茶组植物叶片间存在的药用价值差异。结果表明，7种金花茶组植物叶片的营养成分含量丰富且存在显著差异：凹脉金花茶(Camellia impressinervis)的茶多酚含量最高，达7.13%；东兴金花茶(C. tunghinensis)的总皂苷含量最高，达0.41 g·100 g^-1；柠檬金花茶(C. limonia)的总黄酮含量最高，达671.67 mg·100 g^-1。矿质元素方面各种类均呈现高钾低钠的特征，凹脉金花茶、柠檬金花茶和小果金花茶(C. nitidissima var. microcarpa)K含量高于Ca，且各品种中均检测出Se元素。综合结果表明，凹脉金花茶叶片中茶多酚、总多糖、总氨基酸等各类营养成分含量相对较高，具有潜在的研究与开发价值。

Comparison of Main Active Ingredient Contents in Leaves of 7 Species of Camellia sect. Chrysantha

To provide a higher value reference for Camellia nitidissima varieties breeding, promoting the development and utilization of C. nitidissima varieties, used the mature leaves of seven different species as test materials. The content of flavonoids, polyphenols, total polysaccharides, total saponins, total amino acids and vitamin E and seven mineral elements such as K, Ca, Na, Fe, Mn, Zn and Se were determined and compared. And also a cluster analysis was conducted. The differences of seven varieties in medicinal value were also examined. The results showed that the nutrient content of each variety was rich and there were significant differences. The content of flavonoids of C. limonia was up to 671.67 mg·100 g^-1; the content of polyphenols of C. impressinervis was up to 7.13%; the content of total saponins of C. tunghinensis was up to 0.41 g·100 g^-1. In terms of mineral elements, all varieties showed the characteristics of high content of K and low content of Na. The contents of K in C. limonia, C. impressinervis and C. nitidissima var. microcarpa leaves were higher than those of Ca, and Se was detected in all species. The 7 varieties could be divided into 3 groups according to the result of the cluster analysis. The comprehensive results showed that the content of polyphenols, total polysaccharides, total amino acids and other nutrients in the leaves of C. impressinervis was relatively high, and its medicinal value might be relatively considerable.