Data/hora: 17/07/2025 12:57:52

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Effets du chlorure de tributylétain sur la croissance et le métabolisme de la diatomée marine Phaeodactylum tricornutum (Bohlin)	
Autores: 	Mouhri, K; Marsot, P; Pelletier, E; Loudiki, M; Saintlouis, R.	
Data: 	1995	
Ano: 	1995	
Resumo: 	Tributyltin (TBT) is a toxic organometallic compound, used as a biocide in marine antifouling paints, that may be harmful to marine organisms living in coastal waters. This study attempts to provide a better understanding of the effects of TBT on the growth and metabolism of a dominant marine diatom from the St Lawrence Estuary: Phaeodactylum tricornutum. Experiments were conducted in batch cultures exposed during one week to TBT concentrations ranging from 0.5 to 20.0 mu g l(-1). The algal growth was much reduced by concentrations of 2.0 to 20.0 mu g l(-1), with reduction of cell density and cell death occurring within a few days at higher TBT concentrations. Exposure to pollutant also resulted in mucilaginous agglutination of cells into large, rapidly sinking aggregates. The physiological toxic effects of TBT on NO3- + NO2- uptake after a 72-hour exposure to high TBT level (20.0 mu g l(-1)) and on assimilation and incorporation activities were reflected in an important intracellular accumulation of these nutrients. Bioaccumulation of TBT by algae was detected after 24 h of continuous exposure, and concentrations increased with increasing levels of contamination. A plateau in algal bioaccumulation of organotins appeared after 72 h with a partial biodegradation of TBT into dibutyltin (DBT).	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/00097/20869/18487.pdf	
Editor: 	Gauthier-Villars	
Relação: 	http://archimer.ifremer.fr/doc/00097/20869/	
Formato: 	application/pdf	
Fonte: 	Oceanologica Acta (0399-1784) (Gauthier-Villars), 1995 , Vol. 18 , N. 3 , P. 363-370