RESUMO
A Pseudomonas sp. capable of growth on several nonchlorinated and mono-p-chloro-substituted analogs of DDT as a sole carbon source degraded bis(p-chlorophenyl)methane and 1,1-bis(p-chlorophenyl)ethane only in the presence of diphenylethane. The products p-chlorophenylacetic acid and 2-(p-chlorophenyl)-propionic acid were not further metabolized by the bacterium. Other chlorinated analogs of DDT were found to be recalcitrant to cometabolic degradation with diphenylethane.
Assuntos
DDT/análogos & derivados , Pseudomonas/metabolismo , Derivados de Benzeno/metabolismo , DDT/metabolismo , Etano/análogos & derivados , Etano/metabolismoRESUMO
A Pseudomonas sp. rapidly metabolized several nonchlorinated analogues of DDT, with the exception of 2,2-diphenylethanol, as the sole carbon source. Several of the mono-p-chloro-substituted diphenyl analogues were also metabolized as the sole carbon source by the bacterium. The resulting chlorinated aromatic acid metabolites were not further metabolized. The isolate was unable to metabolize p,p'-dichlorodiphenyl analogues as the sole carbon source.
Assuntos
DDT/metabolismo , Pseudomonas/metabolismo , Biodegradação Ambiental , Compostos de Bifenilo/metabolismo , DDT/análogos & derivados , Diclorodifenil Dicloroetileno/metabolismo , Pseudomonas/crescimento & desenvolvimento , Fatores de TempoRESUMO
Lindane was degraded by Escherichia coli isolated from rat feces. About 10% of the added lindane was metabolized by the bacterium in Trypticase soy broth containing the pesticide. A single metabolite, 2,3,4,5,6-pentachloro-1-cyclohexene, was detected and identified by gas chromatography and mass spectrometry.