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Multiple physiological response analyses aid the understanding of sensitivity variation between Microcystis aeruginosa and Chlorella sp. under paraquat exposures
Bai,Fang; Jia,Yunlu; Yang,Cuiping; Li,Tianli; Wu,Zhongxing; Liu,Jin; Song,Lirong
2019-10-17
Source PublicationEnvironmental Sciences Europe
ISSN2190-4707
Volume31Issue:1Pages:1-17
Abstract

AbstractBackgroundSensitivity differences to chemical pollutants in different phytoplankton species may potentially shape the community structure of phytoplankton. However, detailed information supporting the understanding of sensitivity variations between phytoplankton species is still limited.ResultsTo investigate sensitivity differences between the cyanobacterium Microcystis aeruginosa, and the green alga Chlorella sp. to paraquat, multiple physiological parameters were measured and compared through acute and chronic toxicity assays. Early photosynthetic responses during acute toxicity assays showed that paraquat affects Photosynthesis System II energy fluxes in M. aeruginosa within 3?h of exposure, but not in Chlorella sp. After 5?h of cumulative exposure, an EC50 based on the maximum quantum yield for primary photochemistry of 0.54?mg L?1 was achieved and remained more or less constant, while the EC50 values for Chlorella fluctuated around 44.76?±?3.13?mg L?1 after 24?h of exposure. During chronic 96?h exposure to paraquat, differences in antioxidant enzyme activities, reactive oxygen species (ROS) levels, and ultrastructure were observed in both M. aeruginosa and Chlorella sp. An increase in the intracellular levels of ROS and the number of plasma membrane damaged cells was observed in M. aeruginosa in the 0.2, 0.5, and 1.0?mg L?1 treatments (p?

KeywordEarly response Chronic response Growth inhibition Photosynthesis-inhibiting herbicide Phytotoxicity Phytoplankton community
DOI10.1186/s12302-019-0255-4
Language英语
WOS IDBMC:10.1186/s12302-019-0255-4
PublisherSpringer Berlin Heidelberg
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/33380
Collection藻类生物学及应用研究中心_期刊论文
Corresponding AuthorJia,Yunlu; Song,Lirong
Recommended Citation
GB/T 7714
Bai,Fang,Jia,Yunlu,Yang,Cuiping,et al. Multiple physiological response analyses aid the understanding of sensitivity variation between Microcystis aeruginosa and Chlorella sp. under paraquat exposures[J]. Environmental Sciences Europe,2019,31(1):1-17.
APA Bai,Fang.,Jia,Yunlu.,Yang,Cuiping.,Li,Tianli.,Wu,Zhongxing.,...&Song,Lirong.(2019).Multiple physiological response analyses aid the understanding of sensitivity variation between Microcystis aeruginosa and Chlorella sp. under paraquat exposures.Environmental Sciences Europe,31(1),1-17.
MLA Bai,Fang,et al."Multiple physiological response analyses aid the understanding of sensitivity variation between Microcystis aeruginosa and Chlorella sp. under paraquat exposures".Environmental Sciences Europe 31.1(2019):1-17.
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