Plasmid incidence in marine bacteria isolated from petroleum polluted sites on different petroleum hydrocarbons |
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Authors: | Richard Devereux Ronald K Sizemore |
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Institution: | 1. Department of Biology, University of Houston, Houston, TX 77004, USA;2. Department of Biology, University of North Carolina at Wilmington, Wilmington, NC 28406, USA |
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Abstract: | Oil-degrading bacteria isolated from oil spills, an industrial bay, and an offshore oil field by liquid enrichment on crude oils and polynuclear aromatic hydrocarbon compounds were screened for extra-chromosomal DNA. Plasmids were detected in 21% of the strains isolated on whole crude oil and in 17% of the strains isolated on polynuclear aromatic hydrocarbons. Multiple plasmids were observed in 50% of the plasmid-containing strains. Pseudomonas was the predominant genus isolated during the study. Plasmids do not appear to be of importance to these strains during degradation of freshly introduced oil at a nonpolluted site such as might be the case in an ocean oil spill. Plasmids do appear to be significant in the adaptation of Pseudomonas species to chronic petroleum pollution. |
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Keywords: | To whom reprint requests should be addressed |
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