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Variations of Endogenous Hormone Levels in Tea Shoots During Their Developments

Pan Gensheng, Shen Shengrong, Wu Boqian, Qian Lisheng (Department of Tea Science,Zhejiang Agricultural University,Hangzhou 310029)  
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.
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