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研究了茶树体内特异成分对辐照诱导自由基的作用。结果表明，辐照茶籽内自由基的增长趋势表现为乔木型大叶品种大于灌木型中、小叶品种，１０个品种茶籽内自由基的耗照剂量效应模型为ｙ＝ａｅ（－ｂ／ｘ）。茶树体内儿茶素、茶多酚、黄酮苷、咖啡碱等特异成分与其辐射敏感性及自由基含量变化密切相关。影响辐照茶树体内自由基消长的主要因子是儿茶素，其中（－）－没食子儿茶素没食子酸酯（ＥＧＣＧ）与自由基反应有浓度效应，在低浓度条件下，具有诱发产生自由基的作用，而在高浓度条件下，则有消除自由基的作用
The effects of specific components in tea plant on free radicals induced by irradiation were studied. The results showed that the growth trend of free radicals in irradiated tea seeds showed that the arborous large-leaved varieties were larger than the shrub-like medium and small-leaf varieties. The radiation-induced dose-response model of free radicals in the tea seeds of 10 varieties was y = ae x). Tea catechins, tea polyphenols, flavonoid glycosides, caffeine and other specific components and its radiation sensitivity and free radical content changes are closely related. The main factor that affected the growth and decline of free radicals in irradiated tea plants was catechin, in which the concentration of (-) - gallocatechin gallate (EGCG) reacted with free radicals. Under low concentration, EGCG had induced free radicals Role, while in high concentrations of conditions, then eliminate the role of free radicals