Hydrocarbon mineralization in sediments and plasmid incidence in sediment bacteria from the campeche bank

ID de revista: PMC184472

PMID: 16348204

Autor principal: Leahy JG

Revista: Appl Environ Microbiol

Año: 1990

Plataforma de Búsqueda: PubMed

DOI: 10.1128/AEM.56.6.1565-1570.1990

Metodología: Experimento

Grupo de estudio: Microorganismos


Rates of degradation of radiolabeled hydrocarbons and incidence of bacterial plasmid DNA were investigated in sediment samples collected from the Campeche Bank, Gulf of Mexico, site of an offshore oil field containing several petroleum platforms. Overall rates of mineralization of [‘4C]hexadecane and [‘4C]phenanthrene measured for sediments were negligible; <1% of the substrate was converted to CO2 in all cases. Low mineralization rates are ascribed to nutrient limitations and to lack of adaptation by microbial communities to hydrocarbon contaminants. Plasmid frequency data for sediment bacteria similarly showed no correlation with proximity to the oil field, but, instead, showed correlation with water column depth at each sampling site. Significant differences between sites were observed for proportion of isolates carrying single or multiple plasmids and mean number of plasmids per isolate, each of which increased as a function of depth.


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