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铬(Ⅵ)老化对赤子爱胜蚓抗氧化酶活性的影响

王婉华 陈丽红 张 聪 王晓南 张 睿 刘征涛

王婉华, 陈丽红, 张 聪, 王晓南, 张 睿, 刘征涛. 铬(Ⅵ)老化对赤子爱胜蚓抗氧化酶活性的影响[J]. 环境科学研究, 2015, 28(11): 1687-1692.
引用本文: 王婉华, 陈丽红, 张 聪, 王晓南, 张 睿, 刘征涛. 铬(Ⅵ)老化对赤子爱胜蚓抗氧化酶活性的影响[J]. 环境科学研究, 2015, 28(11): 1687-1692.
WANG Wanhua, CHEN Lihong, ZHANG Cong, WANG Xiaonan, ZHANG Rui, LIU Zhengtao. Effects of Aged Chromium (Ⅵ) on Activities of Antioxidant Enzymes of Eisenia fetida[J]. Research of Environmental Sciences, 2015, 28(11): 1687-1692.
Citation: WANG Wanhua, CHEN Lihong, ZHANG Cong, WANG Xiaonan, ZHANG Rui, LIU Zhengtao. Effects of Aged Chromium (Ⅵ) on Activities of Antioxidant Enzymes of Eisenia fetida[J]. Research of Environmental Sciences, 2015, 28(11): 1687-1692.

铬(Ⅵ)老化对赤子爱胜蚓抗氧化酶活性的影响

基金项目: 国家环境保护公益性行业科研专项(201109054)

Effects of Aged Chromium (Ⅵ) on Activities of Antioxidant Enzymes of Eisenia fetida

  • 摘要: 为评估土壤Cr(Ⅵ)老化的生态风险,设计未老化和老化人工土壤组,研究Cr(Ⅵ)对赤子爱胜蚓体内SOD(超氧化物歧化酶)、CAT(过氧化氢酶)和POD(过氧化物酶)活性的影响. 结果表明:在未老化土壤中,30 mg/kg(低浓度)、60 mg/kg(中浓度)和90 mg/kg(高浓度)Cr(Ⅵ)对赤子爱胜蚓抗氧化酶系统产生了显著的影响,在暴露的前14 d,赤子爱胜蚓体内SOD和CAT活性均随土壤中w〔Cr(Ⅵ)〕的升高而降低(暴露第3天,低浓度组除外),高浓度组与对照组相比降低了约60%;在暴露的第14天~第21天,SOD和CAT活性均显著升高,但POD的活性一直处于抑制状态. 在老化28 d的人工土壤中,暴露第1天,CAT和POD活性均显著升高,随着暴露时间的延长,其酶活性均受到显著抑制;但蚯蚓体内SOD活性在整个试验过程中均未受显著影响. Cr(Ⅵ)对赤子爱胜蚓体内3种抗氧化酶活性的影响在未老化和老化土壤中有很大差异,这种差异影响到对土壤Cr(Ⅵ)污染的毒性评估. 因此,进行Cr(Ⅵ)毒性试验时应考虑其在土壤中的老化作用.

     

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出版历程
  • 收稿日期:  2015-01-08
  • 修回日期:  2015-05-05
  • 刊出日期:  2015-11-25

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