title: Role of metal mixtures (Ca, Cu and Pb) on Cd bioaccumulation and phytochelatin production by Chlamydomonas reinhardtii.
abstract: The goal of the study was to determine whether metal uptake and biological effects could be predicted by free ion concentrations when organisms were exposed to Cd and a second metal. Bioaccumulation and algal phytochelatin (PC) concentrations were determined for Chlamydomonas reinhardtii following a 6-h exposure. Bioaccumulation results, after six hours of exposure, showed that Cd uptake decreased in the presence of relatively high concentrations of Ca, Cu and Pb, however, Cd bioaccumulation increased in the presence of ca. equimolar concentrations of Cu. A good correlation was observed between the production of PCs and the amount of metals bioaccumulated for the binary mixtures of Cd-Pb and Cd-Cu, but not the Cd-Ca mixture. Overall, the results suggested that, in the case of mixtures, bioaccumulated metal rather than free ion concentrations would be a better predictor of biological effect.
authors: Department of Chemistry, Biophysical Environmental Chemistry Group, University of Montreal, C.P. 6128, Succursale Centre-Ville, Montreal H3C 3J7, Canada.
authors: Pauline
authors: P
authors: Abboud
authors: Kevin J
authors: KJ
authors: Wilkinson
mesh_terms: D002104:Cadmium / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D016825:Chlamydomonas reinhardtii / Q000502:physiology*; D003300:Copper / Q000378:metabolism; D007854:Lead / Q000378:metabolism; D008670:Metals / Q000378:metabolism*; D054811:Phytochelatins / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D003300:Copper; D054811:Phytochelatins; D002118:Calcium