| 铅胁迫对小麦幼苗抗氧化酶活性的影响 |
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| 引用本文： | 庞欣,王东红,彭安.铅胁迫对小麦幼苗抗氧化酶活性的影响[J].环境科学,2001,22(5):108-111. |
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| 作者姓名： | 庞欣 王东红 彭安 |
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| 作者单位： | 中国科学院生态环境研究中心水环境化学国家重点实验室,北京,100085 |
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| 基金项目： | 国家自然科学基金项目(29890280-1) |
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| 摘 要： | 通过营养液培养实验,研究小麦幼苗在遭受铅胁迫后,地上部及根系抗氧化酶活性的变化.试验表明:小麦幼苗受到铅胁迫后,地上部及根系的超氧化物歧化酶(SOD)活性均显著增加,根系中过氧化氢酶(CAT)的活性也比对照有所增加,但不如SOD酶变化剧烈,表明SOD酶活性是比较敏感的生物指标(biomarker).但是,小麦幼苗地上部及根系的丙二醛(MDA)含量仍均比对照显著升高,表明小麦幼苗的膜系统受到了一定程度的破坏.试验同时还反映出,铅胁迫对小麦幼苗根系的影响远远强于地上部.
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| 关 键 词： | SOD CAT MDA 小麦 营养液培养 |
| 文章编号： | 0250-3301(2001)05-04-0108 |
| 收稿时间： | 2000/11/8 0:00:00 |
| 修稿时间： | 2000年11月8日 |
Effect of Lead Stress on the Activity of Antioxidant Enzymes in Wheat Seedling |
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| Pang Xin,Wang Donghong and Peng An.Effect of Lead Stress on the Activity of Antioxidant Enzymes in Wheat Seedling[J].Chinese Journal of Environmental Science,2001,22(5):108-111. |
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| Authors: | Pang Xin Wang Donghong and Peng An |
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| Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. |
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| Abstract: | The changes of the antioxidant enzyme activity, such as superoxide dismutase (SOD), catalase (CAT) and malondialdehyde (MDA) were researched through nutrient solution culture. The results showed that the activity of SOD in shoot and root were significantly enhanced under lead stress. The activity of CAT in root was also improved, but the degree was not bigger than that of SOD activity. However, the MDA content in shoot and root was significantly higher than that of check group, it suggested that the membrane system were damaged by lead stress. The experiments also revealed that the shoot of wheat seedling was influenced by lead stress greatly stronger than that of root. |
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| Keywords: | SOD CAT MDA wheat nutrient solution culture |
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