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U(Ⅵ)胁迫下碎米莎草体内抗氧化系统响应特征

聂小琴 董发勤 丁德馨 刘 宁 张 东 李广悦 刘明学

聂小琴, 董发勤, 丁德馨, 刘 宁, 张 东, 李广悦, 刘明学. U(Ⅵ)胁迫下碎米莎草体内抗氧化系统响应特征[J]. 环境科学研究, 2015, 28(4): 621-628.
引用本文: 聂小琴, 董发勤, 丁德馨, 刘 宁, 张 东, 李广悦, 刘明学. U(Ⅵ)胁迫下碎米莎草体内抗氧化系统响应特征[J]. 环境科学研究, 2015, 28(4): 621-628.
NIE Xiaoqin, DONG Faqin, DING Dexin, LIU Ning, ZHANG Dong, LI Guangyue, LIU Mingxue. The Responses Characteristics of the Antioxidant System of Cyperus iria L. to Uranium Stress[J]. Research of Environmental Sciences, 2015, 28(4): 621-628.
Citation: NIE Xiaoqin, DONG Faqin, DING Dexin, LIU Ning, ZHANG Dong, LI Guangyue, LIU Mingxue. The Responses Characteristics of the Antioxidant System of Cyperus iria L. to Uranium Stress[J]. Research of Environmental Sciences, 2015, 28(4): 621-628.

U(Ⅵ)胁迫下碎米莎草体内抗氧化系统响应特征

基金项目: 国家自然科学基金委-中国工程物理研究院联合基金项目(11176028);国家重点基础研究发展计划(973)项目(2014CB846003);核废物与环境安全国防重点学科实验室开放基金项目(12zxnp02).

The Responses Characteristics of the Antioxidant System of Cyperus iria L. to Uranium Stress

  • 摘要: 采用水培方式研究了铀尾矿库土著优势植物——碎米莎草不同生长期各部位在不同质量浓度铀〔U(Ⅵ),记为U〕溶液胁迫下w(SP)(SP为可溶性蛋白)、CMDA(丙二醛含量)以及SOD(superoxide dismutase,超氧化物歧化酶)、POD(peroxidase,过氧化物酶)、CAT(catalase,过氧化氢酶)、ATPase(三磷酸腺苷酶)活性的变化. 结果表明,ρ(U)≤250 mg/L时,碎米莎草各部位SOD、POD、CAT活性在整个生长阶段均受到显著诱导(P<0.05),而CMDA、ATPase活性与对照组相比无显著差异(P>0.05);ρ(U)≥750 mg/L时,SOD、POD和CAT活性与对照组相比显著降低(P<0.05);ρ(U)达到1 000 mg/L以上时,与对照组相比,降低趋势更显著(P<0.01),而ATPase活性受到显著诱导(P<0.05),CMDA在幼苗期显著增加(P<0.05),膜脂过氧化损伤程度严重. 表明碎米莎草对铀胁迫的生理响应中,以根系SOD、CMDA的响应最为敏感.

     

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  • 刊出日期:  2015-04-25

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