Biokinetics and metallothionein-like proteins response in oysters facing metal challenges in an estuary

Environmental Toxicology and Chemistry
Yong Jin, Wen-Xiong Wang

Abstract

The discovery of colored oysters in an estuary in Southern China raised questions of how these oysters could survive in such an unpredictable estuary. In the present study, the authors conducted a transplant experiment using oysters Crassostrea hongkongensis in the estuary to quantify the changes of metal biokinetics (Cd and Zn) and the responses of metallothionein-like proteins. Oysters in the transplantation experiment accumulated extremely high concentrations of Cd, Cu, Cr, Ni, and Zn. The present study provided the field evidence of the time-course coupling relationship between Cd and Zn bioaccumulation. Over the 2-mo transplantation, the uptake rate constants of Cd and Zn varied greatly during the early stage of exposure but subsequently became comparable among the different locations. The dietary Zn assimilation remained relatively constant, whereas the Cd assimilation increased gradually with increasing period of exposure. No notable difference was seen in dietary metal assimilation among the different locations. In contrast, the efflux rates quantified by the end of transplantation were 26% to 42% higher for Cd and 12% to 37% higher for Zn than that in the unexposed oysters. The authors further demonstrated that the inc...Continue Reading

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Apr 22, 2014·The Science of the Total Environment·Nanyan Weng, Wen-Xiong Wang
Jul 24, 2014·Environmental Toxicology and Chemistry·Lei Wang, Wen-Xiong Wang

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Citations

May 19, 2018·Environmental Science. Processes & Impacts·Wen-Xiong WangNanyan Weng
May 8, 2020·Environmental Science and Pollution Research International·Lifei WangXiaoping Jia

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