湖北农业科学 ›› 2019, Vol. 58 ›› Issue (6): 16-19.doi: 10.14088/j.cnki.issn0439-8114.2019.06.004

• 育种·栽培 • 上一篇    下一篇

PEG模拟干旱胁迫下外源生长调节剂对大豆生理生化指标的影响

吴政霖, 章有知   

  1. 长春师范大学生命科学学院,长春 130032
  • 收稿日期:2018-12-20 出版日期:2019-03-25 发布日期:2019-12-03
  • 通讯作者: 章有知(1981-),男,实验师,主要从事环境生物学研究,(电子信箱)lotus106601@126.com。
  • 作者简介:吴政霖(1997-),男,吉林图们人,在读本科生,研究方向为食品科学与工程,(电话)13504708708(电子信箱)401849138@qq.com

Effects of exogenous auxin on physiological and biochemical characteristics of soybean under PEG simulated drought stress

WU Zheng-lin, ZHANG You-zhi   

  1. College of Life Sciences,Changchun Normal University,Changchun 130032,China
  • Received:2018-12-20 Online:2019-03-25 Published:2019-12-03

摘要: 研究了经外源生长调节剂(IAA)处理的大豆[Glycine max (Linn.) Merr.)]幼苗在PEG-6000模拟干旱胁迫下的生理生化的变化。结果表明,干旱胁迫可以显著降低叶绿素a、叶绿素b和总叶绿素含量,IAA处理则显著提高叶绿素a、叶绿素b和总叶绿素含量。干旱胁迫显著增加MDA含量,IAA处理则显著降低MDA含量。干旱胁迫显著降低AsA含量,增加了GSH含量;IAA处理也显著增加GSH含量。干旱胁迫时,大豆体内CAT、SOD、POD、AsA-POD活性均升高,增强了大豆的抗氧化能力。IAA处理则显著增强了SOD、POD、AsA-POD活性。IAA处理可以增强大豆幼苗对干旱胁迫的抵抗能力。

关键词: 干旱胁迫, 大豆[Glycine max (Linn.) Merr.)], IAA, 叶绿素, MDA

Abstract: Several physiological and biochemical indexes changes of soybean seedlings treated with exogenous auxin (IAA) under PEG-6000 simulated drought stress were studied. The results showed that drought stress could significantly reduce the contents of chlorophyll a, chlorophyll b and total chlorophyll, while IAA could significantly increase the contents of chlorophyll a, chlorophyll b and total chlorophyll. Drought stress significantly increased MDA content, while IAA significantly decreased MDA content. Drought stress significantly decreased AsA content and increased GSH content; IAA also significantly increased GSH content. Under drought stress, the activities of CAT, SOD, POD and AsA-POD of soybean were increased, and the antioxidant capacity of soybean was enhanced. IAA significantly increased SOD, POD and AsA-POD activity. It is concluded that IAA treatment could enhance the resistance of soybean seedlings to drought stress.

Key words: drought stress, soybean plants [Glycine max (Linn.) Merr.)], IAA, chlorophyll, MDA

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