title: Low surfactant concentration increases fungal mineralization of a polychlorinated biphenyl congener but has no effect on overall metabolism.
abstract: Three white rot fungi were compared for their ability to attack polychlorinated biphenyl (PCB) congeners in the presence and absence of the non-ionic Triton X-100 or the anionic Dowfax 8390 surfactants at half their critical micelle concentrations. Neither surfactant affected PCB biodegradation monitored by gas chromatography but the release of 14CO2 from 2,4',5-[U-14C]trichlorobiphenyl by Trametes versicolor was stimulated 12% by Triton X-100. Since mineralization is the complete metabolism of the congener and biodegradation was measured as substrate disappearance, Triton X-100 is proposed to aid intracellular solubilization of 2,4',5-trichlorobiphenyl for complete oxidation by T. versicolor.
authors.affiliation: Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.
authors.forename: L A
authors.initials: LA
authors.lastname: Beaudette
authors.forename: O P
authors.initials: OP
authors.lastname: Ward
authors.forename: M A
authors.initials: MA
authors.lastname: Pickard
authors.forename: P M
authors.initials: PM
authors.lastname: Fedorak
mesh_terms: D001487:Basidiomycota / Q000187:drug effects* / Q000378:metabolism*; D001673:Biodegradation, Environmental; D003470:Culture Media; D017830:Octoxynol / Q000494:pharmacology; D010544:Peroxidases / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D013501:Surface-Active Agents / Q000494:pharmacology*
chemical_list: D003470:Culture Media; D013501:Surface-Active Agents; C015550:2,4',5-trichlorobiphenyl; D017830:Octoxynol; D011078:Polychlorinated Biphenyls; D010544:Peroxidases; C042858:lignin peroxidase; C051129:manganese peroxidase; C030375:2,3-dichlorobiphenyl