| 梁新华,史大刚.干旱胁迫对光果甘草幼苗根系MDA含量及保护酶POD、CAT活性的影响[J].干旱地区农业研究,2006,(3):108~110 |
| 干旱胁迫对光果甘草幼苗根系MDA含量及保护酶POD、CAT活性的影响 |
| Effect of drought stress on the content of malondialdehyole and activity of cell defense enzymes in Glycyrrhiza glabra seedlings roots |
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| DOI：10.7606/j.issn.1000-7601.2006.03.23 |
| 中文关键词: 光果甘草幼苗 根系 干旱胁迫 MDA POD CAT |
| 英文关键词:Glycyrrhiza glabra seedlings roots drought stress MDA POD CAT |
| 基金项目:宁夏大学自然科学基金重点资助项目(NS0402) |
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| 中文摘要: |
| 实验室用甘露醇模拟不同程度干旱胁迫,观测光果甘草幼苗根系膜脂过氧化水平受影响的情况。结果表明当干旱胁迫程度由-0.5 MPa上升到-1.0 MPa时,甘草根系MDA的含量随干旱胁迫程度的增强而升高,同时甘草幼苗根系POD活性下降,而CAT的活性则呈现升高趋势。说明干旱胁迫程度由轻度转为中度后,甘草幼苗的根系产生了膜脂过氧化作用。POD与CAT这两种保护酶活性也随之产生变化,POD活性先升后降,而CAT活性则持续上升,二者相互配合协同作用,以维持和保护甘草幼苗根系细胞膜的完整性,降低膜脂过氧化水平。 |
| 英文摘要: |
| Glycyrrhiza glabra seedlings were treated with the osmotic stress solution mannitol((-0.5)MPa,-1.0MPa).The content of MDA and two defense enzymes activities(POD,CAT) in Glycyrrhiza glabra seedlings roots were measured at the fifth day after treatment.The content of MDA increased at-0.5 MPa and-1.0 MPa mannitol stress,the increase rate was higher at-1.0 MPa stress than that at-0.5 MPa stress,POD activity increased at-0.5 MPa stress and declined at-1.0 MPa stress,CAT activities raised with the stress level.This result suggested that the two defense enzymes POD and CAT might play a key role in reducing lipid peroxidation under drought stress. |
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