Growth of an estuarinePseudomonas sp. on polychlorinated biphenyl.
In the course of a study of the microbial degradation of polychlorinated biphenyls (PCB), 16 cultures, representing 5 genera of bacteria, were isolated. APseudomonas sp. was found to degrade mixtures of PCB (Aroclor 1254) and pure isomers, i.e., hexachlorobiphenyl (HCB). Degradation was found to be variable, depending on length of incubation, purity, and degree of chlorination of the biphenyl molecule. In addition to apparent degradation of PCB, it was observed that PCB stimulated growth and oxygen uptake. Bioaccumulation of PCB residues was suggested since(14)-Clabeled material derived from(14)C-PCB accumulated on or in the bacterial cells. The potential degradation and utilization of PCB by microorganisms suggests that this may be an important mechanism for removal or mobilization of PCB into food chains in the estuarine environment.
18 references, click to expand
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