Data/hora: 09/06/2024 13:28:26

Provedor de dados: 	5	
País: 	France	
Título: 	Genetic regulation involved in the geomicrobiology of manganese in the marine environment.	
Autores: 	Colwell, R; Schuett, C; Zelibor, J.	
Data: 	1984-10	
Ano: 	1984	
Palavras-chave: 	MED I; Pacific Sea water Sediments Bacteria Biogeochemistry Ferromanganese nodules Genomes Oxidation Manganese.	
Resumo: 	Recent reports in the literature suggest a plasmid-encoded mechanism for manganese oxidation by bacteria. To elucidate the role, if any, of plasmids in bacterial manganese oxidation in the marine environment, manganese-oxidizing bacterial strains, isolated from manganese nodules, sediment and seawater samples collected from the Pacific Ocean and Mediterranean Sea were examined for the presence of plasmids and their association with manganese oxidation. 22 of 47 strains of the genera Alcaligenes, Pseudomonas , and Vibrio harbored single plasmids of various sizes even after prolonged storage. The enzymatic oxidation of manganese by some marine bacteria may not be exclusively encoded by plasmid DNA. Functions ascribable to the plasmids remain cryptic, although evidence obtained from the study of Pseudomonas strain 57 suggests that the plasmid is associated with enzymatic manganese oxidation, perhaps by encoding a detoxification mechanism for manganese and copper. It is hypothesized that self-transmissible plasmids provide marine bacteria with an ecologically significant strategy for survival in the natural environment since they are able to transfer plasmid DNA coding for ecologically advantageous functions, such as the ability to oxidize manganese and detoxify heavy metals.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/1984/acte-981.pdf	
Editor: 	Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986	
Relação: 	http://archimer.ifremer.fr/doc/00000/981/	
Formato: 	application/pdf