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

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作者：
OUYANG HuiLingKONG XiangZhenHE WeiQIN NingHE QiShuangWANG YanWANG Rong XU FuLiu Laboratory for Earth Surface Process of Ministry of EducationCollege of Urban Environmental SciencesPeking UniversityBeijing China [100871 ]
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来源：
Chinese Science Bulletin | 2012年 / 57卷 / 25期
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X173 [环境植物学];
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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.
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页码：3369 / 3376
页数：8
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