大量生长在日本的茶树,其叶内内含成分如儿茶素等的含量,随地理条件的变化而变化。这部分是由于环境的影响。对此已进行了许多有效的研究,其中光照条件是研究最多的。对儿茶素来说,最令人信服的实验论据是:生长在荫蔽处的茶树,儿茶素含量增加(Anan和NaKawa 1974)。 Tea trees grown in large quantities in Japan have a content of catechins in their leaves, which varies with geographical conditions. This is partly due to the environmental impact. There have been many effective studies on this subject, of which illumination conditions are the most studied. The most convincing experimental evidence for catechins is that tea trees grown in shade have an increased content of catechins (Anan and NaKawa 1974).