| 镉胁迫下天蓝苜蓿的生理生态响应 |
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| 引用本文： | 刘雪云,陈明林,杨艳,汪敏,刘登义.镉胁迫下天蓝苜蓿的生理生态响应[J].中国草地学报,2007,29(2):45-49. |
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| 作者姓名： | 刘雪云 陈明林 杨艳 汪敏 刘登义 |
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| 作者单位： | 安徽师范大学生物多样性研究中心/重要生物资源保护与利用安徽省重点实验室,安徽,芜湖,241000 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划);安徽省高校青年教师科研项目 |
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| 摘 要： | 通过盆栽实验研究了Cd胁迫对天蓝苜蓿生长和抗氧化酶系统的影响。结果表明：天蓝苜蓿整株鲜重、地上部分鲜重、地下部分鲜重随Cd胁迫增大呈显著降低趋势。天蓝苜蓿叶片电导率和膜脂过氧化产物MDA水平随Cd胁迫增大而增加，呈极显著正相关，相关系数分别为0．955（P〈0．01）和0．984（P〈0．01）。随着Cd浓度的升高，超氧化歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性呈先增后降趋势，说明抗氧化酶系统既具有解毒功能，同时又是Cd^2＋植物毒性的作用位点，天蓝苜蓿3种抗氧化酶对Cd敏感程度表现为SOD〉POD〉CAT。
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| 关 键 词： | 镉 天蓝苜蓿 细胞膜 抗氧化酶 |
| 文章编号： | 1679-5021（2007）02-0045-05 |
| 修稿时间： | 2006-08-152006-12-23 |
Physi-ecological Responses of Medicago lupulina L. to Cadmium Stress |
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| LIU Xue-yun,CHEN Ming-lin,YANG Yan,WANG Min,LIU Deng-yi.Physi-ecological Responses of Medicago lupulina L. to Cadmium Stress[J].Chinese Journal of Grassland,2007,29(2):45-49. |
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| Authors: | LIU Xue-yun CHEN Ming-lin YANG Yan WANG Min LIU Deng-yi |
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| Institution: | Biodiversity Research Center/Provincial Key Laboratory of Conservation and Exploitation of Biological Resources ,Anhui Normal University ,Wuhu 241000, China |
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| Abstract: | The study with pot experiment showed that the fresh weight of Medicago lupulina L.,above-ground and under-ground fresh weight of Medicago lupulina L.decreased with increasing Cd concentration.The permeability of cell membrane and content of MDA increased with increasing Cd concentration.There was!a significant correlation between these two indices and Cd concentration(0.955** and 0.984**,respectively).With increasing Cd concentration,antioxidative enzyme activities rised at first,then fell.Plant antioxidative enzyme system does not only have detoxification function but also is the reactional site of Cd2 phyto-toxicity.The sensibility of antioxidative enzymes to Cd stress was SOD>POD>CAT. |
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| Keywords: | Cadmium Medicago lupulina L Cell membrane Antioxidative enzyme |
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