| 莼菜(Brasenia schreberi)冬芽对Cr6+污染的抗性反应 |
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| 引用本文： | 杨顶田,施国新,宋东杰,陈伟民.莼菜(Brasenia schreberi)冬芽对Cr6+污染的抗性反应[J].湖泊科学,2001,13(2):169-174. |
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| 作者姓名： | 杨顶田 施国新 宋东杰 陈伟民 |
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| 作者单位： | [1]中国科学院南京地理与湖泊研究所,南京210008 [2]南京师范大学生命科学学院,南京210097 |
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| 基金项目： | 国家自然科学基金资助项目(39770046),江苏省自然科学基金资助项目(BK97107). |
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| 摘 要： | 研究了Cr^6 污染对Shun菜冬芽外部形态及过氧化物酶、硝酸还原酶活性，叶绿素、O^-2、MDA的含量等生理指标的影响，结果显示：Cr^6 对Shun菜毒害机制在于 制酶活性和损害细胞膜系统，在培养第三天时叶绿素的含量随着Cr^6 浓度的增加而降低；过化物酶的活性在10mg/L中最高；硝酸还原酶活性除在5mg/L中的略微升高外，在10－40mg/L之间随着Cr^6 培养浓度的升高而降低；O^-2的含量在5mg/L中的最高，在10mg/L中略高于对照，在随后培养中承学度的升高而降低，MDA的含量变化趋势和O^-2相似。
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| 关 键 词： | Shun菜 过氧化物酶 硝酸还原酶 铬离子 叶绿素 生理指标 毒害机制 |
| 收稿时间： | 2000/3/30 0:00:00 |
| 修稿时间： | 2000年3月30日 |
The Resistant Reaction of Brasenia schreberi Winter-Bud to Cr6+ Pollution |
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| YANG Dingtian,SHI Guoxin,SONG Dongjie and CHEN Weimin.The Resistant Reaction of Brasenia schreberi Winter-Bud to Cr6+ Pollution[J].Journal of Lake Science,2001,13(2):169-174. |
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| Authors: | YANG Dingtian SHI Guoxin SONG Dongjie and CHEN Weimin |
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| Institution: | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China,Nanjing Normal University Nanjing 210097, P. R. China,Nanjing Normal University Nanjing 210097, P. R. China and Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China |
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| Abstract: | This paper mainly deals with the changes of external morphology, the activity of peroxidase and nit rate reductase, the content of chlorophyll, O2-· and MDA in Brasenia schreberi by Cr6+ treatment.The results show ed the reason of Cr6+ injuring Brasenia schreberi w as that Cr6+ inhibited the activity of enzymes and damaged membrane.In the third day, the content of chlorophyll reduced with the increasing concent ration of Cr6+, the activity of peroxidase was the highest at 10 mg/L, the activity of nit rate reductase was a lit tle higher at 5mg/L, but reduced with the increasing concent ration of Cr6+ up to 40mg/L, the content of O2-· w as the highest at 5mg/L, and a little higher than control group at 10mg/L, then it reduced with the increasing culture concentration of Cr6+, the trend of changes in MDA was relatively similar with that of O2-·. |
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