脱落酸对干旱胁迫下茶树生理特性的影响

doi:10.13305/j.cnki.jts.2014.05.008

Abstract

Abstract: Abscisic acid (ABA) is one kind of important plant hormone. It plays great roles in plant tolerance to stresses. In order to understand the effects of ABA on the tea plant under drought stress, cultivar ‘Yingshuang’ was used as the material and treated with 100 mg·mL^-1, 200 mg·mL^-1 polyethylene glycol 6000 (PEG 6000), and then the physiological and biochemical indicators were determined. The results showed that osmotic content and antioxidant enzyme activity increased slightly after being treated with ABA. Under drought stress, ABA reduced the impact of drought stress on photosynthetic system of tea plant. Simultaneously, the contents of soluble protein, soluble sugar, and proline were increased and the activities of superoxide dismutase, catalase and peroxide were increased accordingly. This phenomenon implied ABA can decrease the damage of drought stress on tea plant and enhance the ability of drought tolerance in tea plant. The osmotic content and antioxidant enzyme activity maintained a higher level in the tea plant samples which have been treated by ABA after rehydration. Exogenous ABA perhaps showed a certain effect on drought resistance of tea plant.

Key words: tea plant, drought stress, abscisic acid, physiology and biochemistry index

CLC Number:

ZHOU Lin, XU Hui, ZHU Xujun, CHEN Xuan, WANG Yuhua, FANG Wanping, LI Xinghui. Effect of Abscisic Acid on Physiological Characteristics of Tea Plant under Drought Stress[J]. Journal of Tea Science, 2014, 34(5): 473-480.

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Effect of Abscisic Acid on Physiological Characteristics of Tea Plant under Drought Stress

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