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. 1981 Jun;146(3):920–927. doi: 10.1128/jb.146.3.920-927.1981

Selective enrichment of Pseudomonas spp. defective in catabolism after exposure to halogenated substrates.

G J Wigmore, D W Ribbons
PMCID: PMC216945  PMID: 7240088

Abstract

Significant selective enrichments of mutants defective in catabolic pathways can be achieved by exposure of pseudomonad cells to halogenated analogs of growth substrates. Between 3 and 95% of viable clones rescued from such enrichments have been defective in specific catabolic pathways. This has been demonstrated for eight different catabolic pathways for aromatic compounds in pseudomonads, in which the genes are located on plasmids or on the chromosome. The plasmid-encoded pathways studied include those for the catabolism of p-cymene (CYM), m- and p-xylenes (TOL), naphthalene (NAH), salicylate (SAL), and 4-methylphthalate (MOP), and the chromosome-encoded pathways include those for p-hydroxybenzoate, monohydric phenols, and p-anisate utilization. The recalcitrance of halogenated compounds may, in part, be explained by these observations, which introduce an as yet not widely recognized factor in assessment of biodegradability of halogenated compounds and their effects on the transformation of the natural substrates.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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