| 胀果甘草种子萌发对干旱胁迫的生理响应 |
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| 引用本文： | 史薇,徐海量,赵新风,凌红波,李媛.胀果甘草种子萌发对干旱胁迫的生理响应[J].生态学报,2010,30(8):2112-2117. |
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| 作者姓名： | 史薇 徐海量 赵新风 凌红波 李媛 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所,乌鲁木齐,830011;中国科学院研究生院,北京,100049
2. 中国科学院新疆生态与地理研究所,乌鲁木齐,830011 |
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| 基金项目： | 国家自然科学基金资助项目(40671036, 30600092); 中国科学院西部行动计划资助项目(45761090-9) |
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| 摘 要： | 为探讨胀果甘草种子萌发对干旱胁迫的生理生化适应机制,以聚乙二醇(PEG)-6000模拟干旱胁迫,分析了胀果甘草(Glycyrrhiza inflata)种子萌发过程中发芽率(GR)、丙二醛(MDA)及游离脯氨酸(Pro)、可溶性糖(SS)含量和超氧化物歧化酶(SOD)、过氧化物酶(POD)活性的动态变化规律。结果显示,水势为-0.1MPa时,GR达到100%,之后随着干旱胁迫增强而显著降低(P0.05);MDA、Pro含量及SOD、POD活性都表现出水势≥-0.2MPa时增加和-1.4MPa≤水势-0.2MPa时减少的明显趋势(P0.05),这4个指标两两之间的相关关系均达到显著水平(P0.05);而干旱胁迫增强使SS含量显著增加(P0.05)。
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| 关 键 词： | 胀果甘草 种子萌发 干旱胁迫 |
| 收稿时间： | 5/7/2009 12:00:00 AM |
| 修稿时间： | 2009/11/9 0:00:00 |
Physiological and biochemical responses to drought stress during seed germination of Glycyrrhiza inflata |
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| shiwei.Physiological and biochemical responses to drought stress during seed germination of Glycyrrhiza inflata[J].Acta Ecologica Sinica,2010,30(8):2112-2117. |
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| Authors: | shiwei |
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| Institution: | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences |
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| Abstract: | Dynamics of germination rate ( GR) , malondialdehyde ( MDA), free proline ( Pro ) , soluble sugar ( SS ) , superoxide dismutase (SOD) and peroxidase (POD) were analyzed during seed germination of Glycyrrhiza inflata under drought stress simulated by polyethylene glycol (PEG)-6000. The Results showed that, GR was 100% under -0. 1MPa of water potential then decreased when the drought stress intensified; MDA, Pro, SOD and POD increased when water potentials-0. 2MPa but then decreased when - 1. 4MPa≤water potential < -0. 2MPa (P<0. 05). The correlations among the aforementioned four indexes were significant ( P < 0. 05), while the drought stress increased SS significantly at P <0. 05. |
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| Keywords: | Glycyrrhiza inflata seed germination drought stress |
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