茶树新梢生育过程内源激素水平的变化

Variations of Endogenous Hormone Levels in Tea Shoots During Their Developments

用ＨＰＬＣ检测了不同物候型茶树新梢生育过程中内源激素水平的变化。结果表明，早生种和枝梢顶芽ＩＡＡ含量低，Ｚｅａｔｉｎ含量高，ＡＢＡ／ＩＡＡ与Ｚｅａｔｉｎ／ＩＡＡ比值高，Ｚｅａｔｉｎ／ＡＢＡ比值低；新梢生育过程中，ＩＡＡ和ＡＢＡ含随新梢展叶数增加而下降，ＡＢＡ／ＩＡＡ比值呈“Ｓ”形曲线变化，Ｚｅａｔｉｎ／ＡＢＡ比值随新梢展叶数增加而下降；早春轻剪和喷洒催发素使ＩＡＡ水平下降，ＡＢＡ／ＩＡＡ比值提高，Ｚｅａｔｉｎ／ＡＢＡ比值下降，对新梢激素有调节平衡作用。

By using the technique of High Performance Liquid Chromatography(HPLC),varations of endogenous hormone levels in tea shoots during their developments were investigated.Results showed that the content of indole 3 acetic acid(IAA) and the ratio of Zeatin to ABA(abscisic acid) were low,but the Zeatin content and the ratios of ABA to IAA and of Zeatin to IAA were high in early sprouting cultivars and terminal buds.During the development of the shoots,the contents of IAA and ABA,the ratio of Zeatin to ABA gradually decreased with the increasing of the spread leaves,and the ratio of ABA to IAA could be represented by the “S”curve.Light pruning and spraying Cuifasu,a mixture of exogenous hormones and nutrient elements,in early spring could decrease the IAA content and the ratio of Zeatin to ABA,increase the ratio of ABA to IAA,and adjust the balance of the endogenous hormone levels during the development of the shoots.