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为了解不同(品)种柿叶总酚与总黄酮含量差异及其年动态变化规律,采用紫外分光光度法对15份柿叶资源进行了研究。结果表明:15份柿叶资源总酚含量在13.84~107.42mg/g波动,变异系数较大;总黄酮含量在12.06~58.20mg/g波动,变异系数较小。柿近缘种、野生柿、涩柿、甜柿总酚年均含量及变异系数分别为36.83、43.82、46.05、38.86mg/g和32.46%、30.58%、35.31%、30.78%;总黄酮年均含量及其变异系数分别为33.92、29.43、27.13、26.19mg/g和21.01%、19.75%、18.59%、17.33%。不同(品)种柿叶总酚和总黄酮含量年动态变化差异较大,含量高峰时期分别集中在7—8月和8月中下旬。初步筛选出吊柿、栾川牛心、野柿2和玉环长柿等总酚含量高以及油柿和野柿1等总黄酮含量高的优质种质。柿叶中含有丰富的酚类与黄酮类物质,不同(品)种间含量差异较大,年动态变化也因(品)种不同而不同,因此做好柿资源的评价工作,对柿产业的发展具有重要意义。
In order to understand the difference of total phenolic content and total flavonoid content of different persimmon leaves and their annual dynamic changes, 15 persimmon leaves resources were studied by ultraviolet spectrophotometry. The results showed that the total phenolics content of 15 persimmon leaves fluctuated between 13.84 and 107.42 mg / g, and the coefficient of variation was large. The content of total flavonoids fluctuated between 12.06 and 58.20 mg / g with a small coefficient of variation. The average annual content and coefficient of variation of total phenols in persimmon, persimmon, astringent and persimmon were 36.83, 43.82, 46.05, 38.86 mg / g and 32.46%, 30.58%, 35.31% and 30.78% The content and its coefficient of variation were 33.92,29.43,27.13,26.19mg / g and 21.01%, 19.75%, 18.59% and 17.33% respectively. The content of total phenols and total flavonoids in different persimmon leaves varied greatly in different years. The peak contents were concentrated in July-August and late August respectively. The preliminary screening of high quality germplasm with high total phenols content, such as persimmon, Luanchuan beef heart, wild persimmon 2 and longan persimmon, and high content of total flavonoids such as oleifera and wild persimmon 1. Persimmon leaves are rich in phenolic compounds and flavonoids, different (product) species content is quite different, the annual dynamic changes due to (product) species vary, so do persimmon resources evaluation, the persimmon industry Development is of great significance.