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环境毒理

刘春光,孙红文,张楠,郎宇鹏,赵乐军,戴树桂,庄源益.二价铜离子对川蔓藻(Ruppia maritima)的毒害作用研究[J].环境科学学报,2006,26(11):1870-1874

基金项目：建设部科学技术项目(No.01-2-024);天津市科技攻关计划专项(No.06YFSZSF00100);南开大学-天津大学联合研究项目(No.AJ0013)

摘要：采用室内培养试验方法,研究了水体中二价铜离子(Cu²⁺)对耐盐沉水植物川蔓藻的毒害作用.试验针对叶绿素、可溶性蛋白和POD活性3项指标进行分析.结果表明,川蔓藻对低浓度铜离子的胁迫会产生一定的适应性,在Cu²⁺≤1mg·L^-1的情况下对川蔓藻生长不会造成明显影响.Cu²⁺达到或超过5mg·L^-1就会使川蔓藻植株的生理生化指标出现明显变化,生长也会受到抑制.在试验条件下,铜离子浓度越高,植株受到的伤害越严重.

Abstract：In an indoor experiment, the effects of increasing concentrations of copper(II) in water on submerged plant Ruppia maritima were studied to determine the effect of copper toxicity. Chlorophyll, soluble protein, and POD of Ruppia maritima were measured after copper treatment. Ruppia maritima showed some extent adaptability to slight copper-stress. Low concentration of copper (Cu²⁺ ≤1 mg·L^-1) showed little effect on the growth of Ruppia maritima. When copper(II) concentration reached or exceeded 5 mg·L^-1, the physiological and physiochemical indices of Ruppia maritima changed obviously. Besides, the growth of Ruppia maritima was inhibited. Under the experimental condition, injury to Ruppia maritima increased with the elevation of copper concentrations.