环境毒理
王美娥,周启星.重金属Cd、Cu对小麦(Triticum aestivum)幼苗生理生化过程的影响及其毒性机理研究[J].环境科学学报,2006,26(12):2033-2038
重金属Cd、Cu对小麦(Triticum aestivum)幼苗生理生化过程的影响及其毒性机理研究
- Effects of Cd and Cu on physiological and biochemical processes of wheat (Triticum aestivum) seedlings and their toxic mechanisms
- 基金项目：国家重点基础研究发展规划项目(No.2004CB418503);国家杰出青年科学基金(No.20225722)
- 作者
- 单位
- 王美娥
- 1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳 110016; 2. 中国科学院研究生院, 北京 100039
- 周启星
- 1. 中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳 110016; 2. 南开大学环境科学与工程学院, 天津 300071
- 摘要：对Cd、Cu单因子处理下小麦幼苗叶片和根系的SOD、POD酶活、可溶性蛋白含量以及叶片中叶绿素含量的变化进行了研究.结果表明,Cd、Cu胁迫下,小麦幼苗受到损伤的明显症状之一是叶片叶绿素含量下降;小麦植株叶片POD、SOD酶活能够被诱导而升高;重金属Cd、Cu对小麦幼苗根系的损伤较叶片大;重金属对小麦幼苗的毒害机理之一是抑制了蛋白质的生物合成;重金属引起的各个生化指标随着处理浓度和处理时间的变化远比有机污染物(如豆磺隆)简单.
- Abstract：The changes in SOD and POD activities and soluble protein content in the leaves and roots of wheat (Triticum aestivum) as well as chlorophyll content in the leaves influenced by Cd or Cu were investigated. The results showed that the obvious symptom was observed in the decrease of chlorophyll content in the leaves, and the POD and SOD activities would be induced to increase under the stress of single Cd and Cu. The damages to the roots of wheat by Cd and Cu were stronger than those to the leaves. The inhibition of protein biosynthesis by Cd or Cu was one of the toxic mechanisms involved. The changes in all the parameters caused by Cd and Cu were simple compared with those caused by organic pollutants.
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