人民长江2016，Vol.47Issue(16)：20-25,6.DOI:10.16232/j.cnki.1001-4179.2016.16.005
铜绿微囊藻对Cd2+胁迫的生理生化响应
Physiological and biochemical responses of Microcystis Aerugionosa to Cd2+
摘要
Abstract
To explore the toxic effect of Cd2+ to Microcystis Aerugionosa, the laboratory test was conducted to study its physio-logical and chemical changes under different levels of Cd2+. The results show that:(1) Cd2+ has significant toxic effects on Mi-crocystis aerugionosa, the 24h-EC50、48h-EC50、72h-EC50、96h-EC50 are 0. 978, 0. 863, 0. 646 mg/L and 0. 302 mg/L re-spectively, and EC50 significantly reduces with time ( P <0. 05);(2) Under the stress of Cd2+, the photosynthetic physiologi-cal characteristics of Microcystis aeruginosa are affected, the chlorophyll fluorescence characteristics Fv/Fm, Y[II], ETR, qP trends to be consistent with chlorophyll a and shows a dose-response relationship;(3) Cd2+ induces oxidative stress, in which MDA content and SOD activity are significantly increase ( P <0. 05), and with prolonged exposure, the oxidative stress intensity increases. Therefore, it is concluded that Cd2+ could inhibit the growth of Microcystis aerugionosa, hinder photosynthesis and cause oxidative stress.关键词
铜绿微囊藻/Cd2+/EC50/叶绿素荧光/抗氧化酶/毒性效应Key words
Microcystis Aerugionosa/Cd2+/EC50/Chlorophyll fluorescence/Antioxidative enzyme/toxic effect分类
资源环境引用本文复制引用
郐安琪,赵伟华,李青云,龙萌..铜绿微囊藻对Cd2+胁迫的生理生化响应[J].人民长江,2016,47(16):20-25,6.基金项目
水利部公益性行业科研专项(201501042) （201501042）
水利部行业专项(201401020) （201401020）
