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| 稀土元素铈缓解镉对菱叶的毒害效应研究 | |
| 引用本文： | 罗玉明,保曙琳,丁秉中,丁小余,杨晋彬.稀土元素铈缓解镉对菱叶的毒害效应研究[J].土壤学报,2006,43(5):808-813. |
| 作者姓名： | 罗玉明 保曙琳 丁秉中 丁小余 杨晋彬 |
| 作者单位： | 1. 淮阴师范学院生物系,江苏,淮安,223300;南京师范大学生命科学学院,南京,210097 2. 南京师范大学生命科学学院,南京,210097 3. 淮阴师范学院生物系,江苏,淮安,223300 |
| 基金项目： | 江苏省教育厅自然科学基金 |
| 摘 要： | 利用不同浓度的Cd^2＋和不同浓度的Cd^2＋加5mgL^-1Ce^3＋分别处理菱植株，对菱叶中的叶绿素、脯氨酸、保护酶——超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性的动态变化进行了研究：实验结果表明：在镉胁迫下，随着镉浓度的上升（0～4mgL^-1）菱叶中叶绿素含量下降，SOD、POD活性和脯氨酸含量在镉低浓度时上升而高浓度时下降，相反，CAT活性在镉低浓度时下降而高浓度时上升。与镉离子单一处理相比，Cd^2＋-Ce^3＋复合处理中的Ce^3＋可提高叶片中叶绿素的含量和SOD、POD的活性，尤其是在1mgL^-1 Cd^2＋加5mgL^-1Ce^3＋复合处理中，POD活性较对照提高了8．33倍。由此表明，5mgL^-1Ce^3＋对低浓度镉引起菱叶片的毒害作用有较为明显的缓解效果。 |
| 关 键 词： | 稀土元素 铈 缓解 镉胁迫 菱 酶 |
| 收稿时间： | 09 28 2005 12:00AM |
| 修稿时间： | 2005-09-282006-03-22 |
MODERATING EFFECT OF CERIUM ON CADMIUM TOXICATION OF TRAPA BISPINOSA LEAVES |
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| Luo Yuming,Bao Shulin,Ding Bingzhong,Ding Xiaoyu and Yang Jinbin.MODERATING EFFECT OF CERIUM ON CADMIUM TOXICATION OF TRAPA BISPINOSA LEAVES[J].Acta Pedologica Sinica,2006,43(5):808-813. | |
| Authors: | Luo Yuming Bao Shulin Ding Bingzhong Ding Xiaoyu and Yang Jinbin |
| Institution: | 1 Department of Biology, Huaiyin Teachers College, Huaian, Jiangsu 223300, China; 2 College of Life Sciences, Nanjing Normal University,Nanjing 210097, China |
| Abstract: | Dynamic changes in content of chlorophll and proline,and activity of protective enzymes such as superoxide(SOD),peroxidase(POD) and chloramphenicol acetyltransferase(CAT) in the leaves of Trapa bispinosa treated,respectively,with Cd~(2 )at varying rates and Cd~(2 )plus 5 mg L~(-1) Ce~(3 ) were studied.Results show that chlorophyll contents decreased with increasing Cd~(2 ) concentration,while the activity of both SOD and POD,and the content of proline increased when Cd~(2 ) concentration was low and decreased when it was high.In contrast,CAT activity decreased when it was low and increased when it was high.Compared with the single ion treatments,the Cd~(2 ) Ce~(3 )treatments increased cholorophyll contents,and stimulated activity of SOD and POD,especially,that of the latter,which was 8.33 times higher than its control when the combination was(5 mg L~(-1) Ce~(3 )plus) 1 mg L~(-1) Cd~(2 ).The results suggest that the addition of (5 mg L~(-1) Ce~(3 ) can) relieve the toxicity of a low concentration Cd~(2 ) on leaves of Trapa bispinosa. |
| Keywords: | Rare earth element Cerium Relief Stress of cadmium Trapa Bispinosa Enzymes |
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