| Hg2+、Cr3+共同胁迫对苦草抗氧化酶活性的影响 |
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| 引用本文： | 王小平,华春,李朝晖,贲爱玲,周泉澄. Hg2+、Cr3+共同胁迫对苦草抗氧化酶活性的影响[J]. 安徽农业科学, 2007, 35(33): 10605-10607 |
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| 作者姓名： | 王小平 华春 李朝晖 贲爱玲 周泉澄 |
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| 作者单位： | 南京晓庄学院生命科学系,江苏南京,211171;南京晓庄学院生命科学系,江苏南京,211171;南京晓庄学院生命科学系,江苏南京,211171;南京晓庄学院生命科学系,江苏南京,211171;南京晓庄学院生命科学系,江苏南京,211171 |
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| 基金项目： | 江苏省教育厅自然科学指导项目(2004KJD180113)，南京晓庄学院自然科学基金(2004NXY10)，南京晓庄学院重点课程生态学资助 |
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| 摘 要： | 研究了不同浓度Hg2+、Cr3+共同胁迫对苦草抗氧化酶系统的影响,结果表明:Hg2+、Cr3+及共同胁迫作用,都能导致苦草O2.-、MDA含量发生变化,随离子浓度增加,O2.-、MDA含量先升后降,MDA峰值较O2.-滞后,Hg2+、Cr3+共同作用所产生的毒性效应大于单一Hg2+、Cr3+;随着Hg2+、Cr3+复合离子浓度的增加,SOD、POD活性先升后降,以及CAT在开始阶段略有升高,之后下降,这表明抗氧化酶系统在清除活性氧自由基过程中起重要作用,但植物抗性能力是有一定范围的。
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| 关 键 词： | 苦草 Hg2+ Cr3+ 共同胁迫 |
| 文章编号： | 0517-6611(2007)33-10605-02 |
| 修稿时间： | 2007-10-16 |
Study on Activity Changes of Antioxidant Enzyme Systems of Vallisneria spiralis L.in Combinative Stress of Hg2 and Cr3 |
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| WANG Xiao-ping. Study on Activity Changes of Antioxidant Enzyme Systems of Vallisneria spiralis L.in Combinative Stress of Hg2 and Cr3[J]. Journal of Anhui Agricultural Sciences, 2007, 35(33): 10605-10607 |
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| Authors: | WANG Xiao-ping |
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| Abstract: | The effects of Hg2 and Cr3 interaction on O2.-and MAD and antioxidant enzyme systems of Vallisneria spiralis L were discussed.The results showed that the function of Hg2 and Cr3 and combined pollution made change of O2.-and MAD content in Vallisneria spiralis L.The toxicity of combined pollution was heavier than those of single pollution.With the increasing of the concentration of Hg2 and Cr3 ,accumulation of O2.-and MAD were stimulated in lower level but decreased afterwards.The crest value of O2.-appeared earlier than MAD.The activities of SOD and POD also raised first and dropped then.The activities of CAT raised a little at first and dropped afterwards.It was concluded that antioxidant enzyme systems may be regarded as a protecting function of plants and having effect in antioxidation. |
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| Keywords: | Vallisneria spiralis L. Hg2 Cr3 Combinative stress |
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