Endogenous Plant Hormone Level and Its Regulation Mechanism during Growth of Tea Plant Shoot (Ⅲ) Fluctuation of Endogenous Hormone level under Drought Stress in Tea Plant rShoot
The effects of different degree drought stress on endogenousplant hormone level were probed in leaves of two tea varieties. With drought stress, water deficits were more Serious in cv. Fudingbaihao than in cv. Zisun, IAA and ABA contents increased while Zeatin contents decreased in leaves of both the varieties. There was a negative linear correla tion between ABA contents and water contents and a positive linear correlation between ABA contents and IAA contents in leaves of tea plant. With the time of drought stress,the ratio of IAA to ABA descended more in cv. Fudingbaihao than in cv Zisun,while the ratio of ABA to Zeatin ascended more in cv. Fudinghaihao than in cv. Zisun. A negative linear correlation was found between the ratio of ABA to Zeatin contents and water content in leaves of tea plant.
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