Effects of five heavy metals at sub-lethal concentrations on the growth and photosynthesis of Chlorella vulgaris  

作　　者：OUYANG HuiLing KONG XiangZhen HE Wei QIN Ning HE QiShuang WANG Yan WANG Rong XU FuLiu 

机构地区：[1]Laboratory for Earth Surface Process of Ministry of Education,College of Urban&Environmental Sciences,Peking University,Beijing 100871,China

出　　处：《Chinese Science Bulletin》2012年第25期3363-3370,共8页

基　　金：supported by the Key Program of National Natural Science Foundation of China (41030529);the National Natural Science Founds for Distinguished Young Scholars (40725004);the National Project for Water Pollution Control (2008ZX07103-005-01);the Specific Scientific Research Funds for Environment Protection Commonweal Section of China(20100932);Doctoral Fund of Ministry of Education of China(20100001110035)

摘　　要：The impact of sub-lethal concentrations(0.05,0.5,5 μmol L 1) of the heavy metals copper(Cu),chromium(Cr),zinc(Zn),cadmium(Cd) and lead(Pb) on the growth and photosynthesis of Chlorella vulgaris was studied during 96 h exposure experiments.The results showed that the effects of these five metals on the growth of Chlorella vulgaris were dependent on both concentration and exposure time.It was found that 5 μmol L 1 treatments of Cu,Cr,Zn,Cd and Pb significantly inhibited the growth of Chlorella vulgaris,and the effect became weaker with an increase in exposure duration.Different effects on chlorophyll fluorescence were found for different metals,with Cu and Cr having an inhibiting effect and Zn and Cd having a promoting effect.The effects of heavy metals upon the growth and photosynthesis of Chlorella vulgaris were independent of each other and not causally related.The impact of sub-lethal concentrations （0.05, 0.5, 5 gmol L-l） of the heavy metals copper （Cu）, chromium （Cr）, zinc （Zn）, cadmium （Cd） and lead （Pb） on the growth and photosynthesis of Chlorella vulgaris was studied during 96 h exposure experiments. The results showed that the effects of these five metals on the growth of Chlorella vulgaris were dependent on both concentration and exposure time. It was found that 5 pmol L-l treatments of Cu, Cr, Zn, Cd and Pb significantly inhibited the growth of Chlorella vulgaris, and the effect became weaker with an increase in exposure duration. Different effects on chlorophyll fluorescence were found for different metals, with Cu and Cr having an inhibiting effect and Zn and Cd having a promoting effect. The effects of heavy metals upon the growth and photosynthesis of Chlorella vulgaris were independent of each other and not causally related.

关 键 词：亚致死浓度 光合作用 小球藻 重金属 生长 镉(CD) 叶绿素荧光 金属铜 

分 类 号：X173[环境科学与工程—环境科学]