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茶叶科学 ›› 2014, Vol. 34 ›› Issue (5): 473-480.doi: 10.13305/j.cnki.jts.2014.05.008

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脱落酸对干旱胁迫下茶树生理特性的影响

周琳, 徐辉, 朱旭君, 陈暄, 王玉花, 房婉萍*, 黎星辉   

  1. 南京农业大学园艺学院,江苏 南京210095
  • 收稿日期:2013-11-06 修回日期:2014-02-11 发布日期:2019-09-03
  • 通讯作者: *fangwp@njau.edu.cn
  • 作者简介:周琳(1989— ),女,江苏无锡人,博士研究生,主要从事茶树生理生化与种质资源研究。
  • 基金资助:
    国家自然科学基金(30800884、31370688)、江苏省科技支撑计划(BE2011319)、南京市科技计划项目(2013创基066)

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

ZHOU Lin, XU Hui, ZHU Xujun, CHEN Xuan, WANG Yuhua, FANG Wanping*, LI Xinghui   

  1. College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2013-11-06 Revised:2014-02-11 Published:2019-09-03

摘要: 脱落酸(Abscisic acid,ABA)是一种重要的植物激素,在植物对胁迫耐受性和抗性中发挥着重要作用。以茶树品种迎霜为材料,分别采用100 mg·mL-1、200 mg·mL-1聚乙二醇6000(PEG 6000)模拟干旱胁迫,研究了外源ABA对干旱胁迫下茶树叶片生理生化特性的影响。结果表明:喷施外源ABA后,渗透调节物质含量和抗氧化酶活性略有提高。干旱胁迫下,外源ABA能提高茶树体内脯氨酸、可溶性糖及可溶性蛋白含量,同时增强了抗氧化酶活性,从而降低干旱胁迫对茶苗的伤害。经ABA处理后的茶苗在复水后,渗透调节物质含量和抗氧化酶活性均保持较高值,外源ABA对提高茶树抗旱性起到一定的作用。

关键词: 茶树, 干旱胁迫, 脱落酸, 生理生化指标

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

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