Degradation of lower-chlorinated and higher-chlorinated PCB congeners (Delor 103 and Delor 105 as equivalents of Aroclor 1242 and Aroclor 1254, respectively) by the white-rot fungus Phanerochoete chrysosporium was investigated in N-limited and non-limited media. No degradation of either Delor 103 or Delor 105 was found in a N-limited medium 9 d after their addition whereas in the non-limited medium during the same period their levels dropped by 55 and 58%, respectively. The degradation was non-specific and no significant differences in the degradation of di-, tri-, tetra-, penta-, hexa-, and hepta-congeners were found. No activity of Mn-dependent peroxidase (MnP) or lignin peroxidase (LiP) was detectable in the non-limited medium. We assume that the degradation of PCBs by P. chrysosporium is relatively non-specific, takes place under non-limited conditions and is independent of the activities of MnP or LiP.

• MeSH
• Aroclors metabolism   MeSH
• Basidiomycota metabolism   MeSH
• Biodegradation, Environmental MeSH
• Chlorodiphenyl (54% Chlorine) MeSH
• Endopeptidases analysis   MeSH
• Environmental Pollutants metabolism   MeSH
• Lignin metabolism   MeSH
• Peroxidases analysis   MeSH
• Polychlorinated Biphenyls metabolism   MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Names of Substances
• 2,4',5-trichlorobiphenyl MeSH Browser
• Aroclors MeSH
• Chlorodiphenyl (54% Chlorine) MeSH
• Endopeptidases MeSH
• Environmental Pollutants MeSH
• lignin peroxidase MeSH Browser
• Lignin MeSH
• manganese peroxidase MeSH Browser
• Peroxidases MeSH
• Polychlorinated Biphenyls MeSH

The ability of Phanerochaete chrysosporium, Trametes versicolor, Coriolopsis polyzona, and Pleurotus ostreatus growing in a mitogen-limited mineral medium (NMM) to degrade PCBs in a commercial, Delor 106 mixture at a concentration of 0.9 ppm was compared. The respective amount of PCBs removed from the fungal cultures within 3 weeks were 25, 50, 41 and 0%. The capacities of the individual fungal species to remove PCBs correlated to some extent with their capabilities of decolorization of NMM agar containing both Poly R-478 or Remazol Brilliant Blue R dyes. Enzyme estimations indicated that both high and relatively stable activities of Mn-dependent peroxidase, Mn-independent peroxidase, lignin peroxidase, and laccase characterized efficient PCB degraders.

• MeSH
• Biodegradation, Environmental MeSH
• Polychlorinated Biphenyls metabolism   MeSH
• Polyporaceae metabolism   MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Comparative Study MeSH
• Names of Substances
• Delor 106 MeSH Browser
• Polychlorinated Biphenyls MeSH