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茶叶科学 ›› 2007, Vol. 27 ›› Issue (3): 192-200.doi: 10.13305/j.cnki.jts.2007.03.010

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儿茶素组成和理化条件对茶黄素酶催化合成的影响

王坤波, 刘仲华*, 赵淑娟, 傅冬和, 黄建安   

  1. 湖南农业大学茶学教育部重点实验室,湖南省天然产物工程技术研究中心,湖南农业大学园艺园林学院,湖南 长沙 410128
  • 收稿日期:2007-03-21 修回日期:2007-05-21 出版日期:2007-09-25 发布日期:2019-09-11
  • 通讯作者: *刘仲华,larkin-liu@163.com
  • 作者简介:王坤波(1976— ),男,湖北人,博士研究生,主要从事茶叶生化研究。
  • 基金资助:
    国家“十五”科技攻关项目(2004BA542C),科技部国际科技合作项目(2006DFA33220)

Effects of Tea Catechin Proportions & Physico-chemical Conditions on the Enzymatic Synthesis of Theaflavin

WANG Kun-bo, LIU Zhong-hua*, ZHAO Shu-juan, FU Dong-he, HUANG Jian-an   

  1. Key Laboratory of Tea Science of Ministry of Education,The Hunan Engineering and Technology center for Natural Products; Horticulture and landscape college, Hunan Agricultural University, Changsha, 410128 China
  • Received:2007-03-21 Revised:2007-05-21 Online:2007-09-25 Published:2019-09-11

摘要: 利用梨果实多酚氧化酶,在单因素试验基础上,设计正交试验,进行酶性合成茶黄素,研究儿茶素组成和理化条件对茶黄素合成的影响,以确定最佳反应条件。结果表明,以儿茶素混合物C(EGC>200?mg/g,EGCG>200?mg/g,儿茶素总量>500?mg/g)为材料,茶黄素酶促合成的最佳条件为:反应体系的最佳pH值为5.5,温度为30℃,底物浓度为5?mg/ml,酶添加量为75?ml/1?000?mg,最佳反应时间40?min。pH值和儿茶素浓度是反应体系中两个重要的影响因子(P<0.05)。

关键词: 茶黄素, 儿茶素组成, 理化条件, 生物合成

Abstract: An in vitro model fermentation system, containing tea catechins and crude pear polyphenol oxidase from pear fruits has been used to determine the effect of tea catechin mixtures of different proportions & physico-chemical conditions on the formation of theaflavin. The optimum condition of theaflavins is 30℃ and The pH optima for theaflavin formation were 5.5. The tea catechins(EGC>200βmg/g, EGCG>200βmg/g, total catechins>500βmg/g) concentration is 5βmg/ml and the concentration of enzyme is 75βml/1β000βmg. pH and temperature in the model fermentation system are the most important factors (P<0.05).

Key words: theaflavin, proportions of tea catechin, physical and chemical conditions, enzymatic synthesis

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