Sublethal or not Responses of multiple biomarkers in Daphnia magna to single and joint effects of BDE-47 and BDE-209

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	Sublethal or not Responses of multiple biomarkers in Daphnia magna to single and joint effects of BDE-47 and BDE-209
	Xiong, Qinli; Shi, Yajuan; Lu, Yonglong; Pan, Kaiwen; Dakhil, Mohammed A.; Zhang, Lin; Xiao, Yang
刊名	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
	2018-11-30
卷号	164 页码:164-171
关键词	Freshwater ecosystems Biomarkers Daphnia magna Mixtures toxicity PBDE congeners
ISSN号	0147-6513
文献子类	Article
英文摘要	Polybrominated diphenyl ethers (PBDEs) are extremely incessant anthropogenic contaminants found in the environment, with dreadful risk to aquatic ecosystems. However, there is a limited amount of data concerning their impacts on freshwater organisms. 2,2',3,3',4,4',5,5',6,6'-decabromodiphenyl ether (BDE-209) and 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) are significant components of total PBDEs in water. The sublethal effects of BDE-47, BDE-209 and their binary mixtures on the aquatic organism Daphnia magna were investigated in acute and chronic exposure experiments. Immobilization and heartbeat were studied in daphnids after 48 h of exposure. Mortality rate, breed number, Cholinesterase (ChE), Glutathione S-transferases (GST) and Catalase (CAT) activities were evaluated after 21 days of exposure. The results showed that at 100 and 200 mu g/L concentration of BDE-47, immobilization rate of daphnids were inhibited by 44.0 +/- 16.7% and 88.0 +/- 10.9%, respectively. The binary mixture of BDE-47 and BDE-209 had uncongenial effects on immobilization of D. magna under acute toxicity test. BDE-209 significantly increased the heartbeat rate of daphnids, which increased even further when combined with BDE-47. After 21 days of exposure, daphnids exposed to single BDE-47 were physiologically altered. The combination of BDE-47 with BDE-209 significantly decreased the mortality rate of daphnids. Irrespective of the concentration, higher numbers of offsprings were produced in the mixtures compared to BDE-47 treatment alone. ChE activities significantly (p < 0.05) decreased at concentrations of 2 and 4 pg/L in single BDE-47 treatment, while GST activity significantly (p < 0.05) decreased at 0.5 g/L. CAT activities significantly increased with BDE-47 treatments in all the tested concentrations (p < 0.05). The mixtures significantly affect ChE (p < 0.05), GST (p < 0.05) and CAT activities (p < 0.05). The results illustrated that the toxicity of the mixture of PBDE congeners exposed to aquatic organisms may have antagonistic effects. The 21 days chronic test in this study suggests that acute toxicity tests, i.e. 48-h tests, using Daphnia may lead to underestimation of risks associated with PBDEs, especially, BDE-209. Hence, there is a necessity to re-examine PBDE congeners' environmental risk in aquatic organisms.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40777]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Xiong, Qinli,Shi, Yajuan,Lu, Yonglong,et al. Sublethal or not Responses of multiple biomarkers in Daphnia magna to single and joint effects of BDE-47 and BDE-209[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2018,164:164-171.
APA	Xiong, Qinli.,Shi, Yajuan.,Lu, Yonglong.,Pan, Kaiwen.,Dakhil, Mohammed A..,...&Xiao, Yang.(2018).Sublethal or not Responses of multiple biomarkers in Daphnia magna to single and joint effects of BDE-47 and BDE-209.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,164,164-171.
MLA	Xiong, Qinli,et al."Sublethal or not Responses of multiple biomarkers in Daphnia magna to single and joint effects of BDE-47 and BDE-209".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 164(2018):164-171.