Purine Alkaloids and Their Metabolism in Camellia Sinensis and Related Species  

作　　者：Chang Liu Yue-Rong Liang Xin-Qiang Zheng 

机构地区：[1]Zhejiang University Tea Research Institute [2]Key laboratory of Horticultural Plants Growth,Development and Biotechnology,Agricultrual Ministry of China

出　　处：《茶叶》2013年第4期240-246,共7页Journal of Tea

基　　金：financially supported by the National Nature Science Foundation of China (Project No.31170645,30900970)

摘　　要：Caffeine,theobromine and theophylline are the major purine alkaloids found in Camellia sinensis.Theacrine was detected in a special Chinese tea plant named kucha(Camellia kucha).With tracer experiments,the metabolism pathway of these purine alkaloids has mostly been explored.The isolation and cloning of the genes encoding enzymes in the related pathway made it possible to develop methods to control caffeine level in tea products via transgenic technique.Further study on the kucha species would be helpful to obtain materials for processing naturally caffeine-less tea.However,there is still a long way to go in this direction such as sensory improvement of products prepared using leaves of kucha.Caffeine,theobromine and theophylline are the major purine alkaloids found in Camellia sinensis.Theacrine was detected in a special Chinese tea plant named kucha （Camellia kucha）.With tracer experiments,the metabolism pathway of these purine alkaloids has mostly been explored.The isolation and cloning of the genes encoding enzymes in the related pathway made it possible to develop methods to control caffeine level in tea products via transgenic technique.Further study on the kucha species would be helpful to obtain materials for processing naturally caffeine-less tea.However,there is still a long way to go in this direction such as sensory improvement of products prepared using leaves of kucha.

关 键 词：嘌呤生物碱 代谢途径 茶树 转基因技术 咖啡因 示踪实验 材料加工 茶产品 

分 类 号：TQ914.1[化学工程]