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应用生态学报 ›› 2011, Vol. 22 ›› Issue (02): 481-487.

• 研究报告 • 上一篇    下一篇

铜和模拟酸雨复合胁迫对酸模铜富集、生长及抗氧化酶系统的影响

何闪英,高永杰,申屠佳丽,陈昆柏   

  1. 浙江工商大学环境科学与工程学院, 杭州 310012
  • 出版日期:2011-02-18 发布日期:2011-02-18

Combined effects of copper and simulated acid rain on copper accumulation, growth, and antioxidant enzyme activities of Rumex acetosa.

HE Shan-ying, GAO Yong-jie, SHENTU Jia-li, CHEN Kun-bai   

  1. College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
  • Online:2011-02-18 Published:2011-02-18

摘要: 采用盆栽方法,研究了Cu(0~1500 mg·kg-1)和酸雨(pH 2.5~5.6)复合胁迫对酸模Cu富集、生长和抗氧化酶系统的影响.结果表明:酸模根和地上部Cu的积累量随土壤Cu浓度增大而增加,且根>茎叶,酸雨能促进酸模对Cu的吸收;随着土壤中Cu浓度和酸雨强度的增加,酸模的生物量逐渐下降,根和叶中MDA含量增加,且与Cu处理浓度显著正相关,根和叶中SOD和POD活性则均呈先上升后下降的趋势.酸模对Cu和酸雨有很强的耐受能力,在酸雨地区Cu污染土壤修复中具有很好的应用潜力.

关键词: 酸模, 酸雨, 铜富集, 抗氧化酶, 污染土壤修复

Abstract: A pot experiment was conducted to study the combined effects of Cu (0-1500 mg·k g-1) and simulated acid rain (pH 2.5-5.6) on the copper accumulation, growth, and antioxidant enzyme activities of Rumex acetosa. With the increasing concentration of soil Cu, the Cu accumulation in R. acetosa increased, being higher in root than in stem and leaf. The exposure to low pH acid rain promoted the Cu uptake by R. acetosa. With the increase of soil Cu concentration and/or of acid rain acidity, the biomass of R. acetosa decreased, leaf and root MDA contents increased and had good correlation with soil Cu concentration, and the SOD and POD activities in leaf and root displayed a decreasing trend after an initial increase. This study showed that R. acetosa had a strong adaptive ability to Cu and acid rain stress, exhibiting a high application potential in the remediation of Cu-contaminated soil in acid rain areas.

Key words: Rumex acetosa, acid rain, copper accumulation, antioxidant enzyme, remediation of contaminated soil