Degradation of polychlorinated biphenyl mixtures by the lignin-degrading fungus Phanerochaete chrysosporium.
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.
Krcmár
P
P
Veterinary Research Institute, Brno, Czech Republic. kahr@vuvel.anet.cz
Ulrich
R
R
D001140:Aroclors / Q000378:metabolism; D001487:Basidiomycota / Q000378:metabolism*; D001673:Biodegradation, Environmental; D020111:Chlorodiphenyl (54% Chlorine); D010450:Endopeptidases / Q000032:analysis; D004785:Environmental Pollutants / Q000378:metabolism*; D008031:Lignin / Q000378:metabolism; D010544:Peroxidases / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000378:metabolism*
D001140:Aroclors; D004785:Environmental Pollutants; D020111:Chlorodiphenyl (54% Chlorine); C015550:2,4',5-trichlorobiphenyl; D008031:Lignin; D011078:Polychlorinated Biphenyls; D010544:Peroxidases; C042858:lignin peroxidase; C051129:manganese peroxidase; D010450:Endopeptidases