| 复合稀土对Cd胁迫下玉米保护酶系统的影响 |
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| 引用本文： | 金琎,叶亚新,徐蕊.复合稀土对Cd胁迫下玉米保护酶系统的影响[J].安徽农业科学,2009,37(17):7928-7931. |
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| 作者姓名： | 金琎 叶亚新 徐蕊 |
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| 作者单位： | 苏州科技学院化学与生物工程学院,江苏苏州,215009;苏州科技学院化学与生物工程学院,江苏苏州,215009;苏州科技学院化学与生物工程学院,江苏苏州,215009 |
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| 基金项目： | 苏州科技学院科研基金，江苏省高校自然科学基金 |
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| 摘 要： | 目的]研究复合稀土对镉胁迫下玉米幼苗叶和根保护酶系统的影响及其机制。方法]通过水培试验研究了中度镉污染对玉米幼苗保护酶系统的影响及复合稀土的缓解效应。结果]镉胁迫1、3、5和7d的玉米幼苗叶片的SOD活性分别为对照组的114％、130％、147％和155％，复合稀土处理组中镉胁迫1、3、5、7和9d的玉米幼苗叶片的SOD活性依次为：79．8、87．2、95．0、103．9和106．0U／ml。玉米幼苗根的SOD活性在镉胁迫的第5天为对照组的2．13倍。玉米幼苗叶片和根的SOD活性峰值分别为124．2和134．1U／ml。镉胁迫1、3、5、7和9d叶片的POD活性分别是对照组的1．81、1．73、1．54、1．47和1．54倍。镉胁迫玉米幼苗根和叶片的POD活性最高分别为对照组的288％和181％。复合稀土处理组在第9天的POD活性是镉胁迫组的1．05倍。镉胁迫玉米幼苗叶和根的CAT活性在第3天分别为对照组的1．08和1．42倍。结论]复合稀土对玉米幼苗镉胁迫损伤的修复作用比单一稀土元素镧好。
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| 关 键 词： | 玉米 镉胁迫 复合稀土 修复 生理指标 |
Effect of Composite Rare Earth on the Protective Enzyme System in Maize under Cd Stress |
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| Institution: | JIN Jin et al ( College of Chemistry and Biological Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009) |
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| Abstract: | Objective] The purpose was to study the effect of composite rare earth on the protective enzyme system in the leaves and roots of maize seedlings and its mechanism.Method] The effect of moderate cadmium pollution on the protective enzyme system in maize seedlings and the buffer effect of composite rare earth were studied in solution culture experiment.Result] The activities of SOD in the leaves of maize seedlings treated by cadmium stress for 1,3,5 and 7 d were 114%,130%,147% and 155% of that in the controlled group resp.The activities of SOD in the leaves of maize seedlings treated by composite rare earth and then treated by cadmium stress for 1,3,5,7 and 9 d were 79.8,87.2,95.0,103.9 and 106.0 U/ml in order.The activities of SOD in the roots of maize seedlings treated by cadmium stress were 2.13 times of that in the controlled group on the 5th day.The peak values of SOD activity in the leaves and roots of maize seedlings were 124.2 and 134.1 U/ml resp.The activities of POD in the leaves of maize seedlings treated by cadmium stress for 1,3,5,7 and 9 d were 1.81,1.73,1.54,1.47 and 1.54 times of that in the controlled group resp.The highest activities of POD in the roots and leaves of maize seedlings treated by cadmium stress were 288% and 181% of that in the controlled group resp.The POD activity in the groups treated by composite rare earth was 1.05 times of that in the group only treated by cadmium stress on the 9th day.The activities of CAT in the leaves and roots of maize seedlings treated by cadmium stress were 1.08 and 1.42 times of that in the controlled group resp.on the 3rd day.Conclusion] The repairing function of composite rare earth on the injury caused by cadmium stress in maize seedlings was better than that of single rare earth element lanthanum. |
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| Keywords: | Maize Cadmium stress Composite rare earth Repair Physiological indices |
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