PMID: 8599540Mar 1, 1996Paper

Influence of chlorobenzoates on the utilisation of chlorobiphenyls and chlorobenzoate mixtures by chlorobiphenyl/chlorobenzoate-mineralising hybrid bacterial strains

Archives of Microbiology
J StratfordG K Robinson

Abstract

Chlorobenzoates (CBA) arise as intermediates during the degradation of polychlorinated biphenyls (PCBs) and some chlorinated herbicides. Since PCBs were produced as complex mixtures, a range of mono-, di-, and possibly trichloro-substituted benzoates would be formed. Chlorobenzoate degradation has been proposed to be one of the rate-limiting steps in the overall PCB-degradation process. Three hybrid bacteria constructed to have the ability to completely mineralise 2-, 3-, or 4-monochlorobiphenyl respectively, have been studied to establish the range of mono- and diCBAs that can be utilised. The three strains were able to mineralise one or more of the following CBAs: 2-, 3-, and 4-monochlorobenzoate and 3,5-dichlorobenzoate. No utilisation of 2,3-, 2,5-, 2,6-, or 3,4-diCBA was observed, and only a low concentration (0.11 mM) of 2,4-diCBA was mineralised. When the strain with the widest substrate range (Burkholderia cepacia JHR22) was simultaneously supplied with two CBAs, one that it could utilise plus one that it was unable to utilise, inhibitory effects were observed. The utilisation of 2-CBA (2.5 mM) by this strain was inhibited by 2,3-CBA (200 microM) and 3,4-CBA (50 microM). Although 2,5-cba and 2,6-cba were not utilised as...Continue Reading

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Citations

Dec 3, 1998·Applied and Environmental Microbiology·A C LaytonG S Sayler
Mar 26, 2010·Environmental Science and Pollution Research International·Kamila DeaversStefan Trapp
Dec 23, 2004·Applied Microbiology and Biotechnology·Dietmar H Pieper
Apr 16, 2005·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Debarati PaulRakesh K Jain
Mar 27, 2012·Microbial Cell Factories·Ermanno FedericiAlessandro D'Annibale

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