title: Biodegradation of PCB congeners by white rot fungus, Ceriporia sp. ZLY-2010, and analysis of metabolites.
abstract: Polychlorinated biphenyls (PCBs) are difficult to degrade due to poor solubility, toxicity, and thermal stability. In the present study, the feasibility of PCB congener biodegradation by Ceriporia sp. ZLY-2010 was evaluated. The biodegradation rates of four PCB congeners, 4,4'-dichlorobiphenyl, 2,3',4',5-tetrachlorobiphenyl, 2,2',4,5,5'-pentachlorobiphenyl, and 2,2',4,4',5,5'-hexachlorobiphenyl were evaluated. The degradation rate of 4,4'-dichlorobiphenyl was 34.03% on incubation day 13, while that of 2,2',4,4',5,5'-hexachlorobiphenyl reached 40.05% on incubation day 17. Therefore, Ceriporia sp. ZLY-2010 was degrading the higher PCB congeners more efficiently. PCB congener degradation products were extracted using acetone and ethyl acetate. No 2,2',4,5,5'-pentachlorobiphenyl metabolites were detected in Ceriporia sp. ZLY-2010 culture, whereas 2,2',4,4',5,5'-hexachlorobiphenyl appeared to degrade to benzoic acid. However, intermediates of 2,2',4,4',5,5'-hexachlorobiphenyl were not detected during degradation. Therefore, additional studies should be performed to explore the mechanisms of PCB degradation. Our results indicate that Ceriporia sp. ZLY-2010 is able to degrade highly chlorinated biphenyls and has potential for use in PCB biodegradation and bioremediation.
authors: Department of Forest Sciences, Seoul National University, Seoul, South Korea.
authors: Chang-Young
authors: CY
authors: Hong
authors: Ki-Seob
authors: KS
authors: Gwak
authors: Su-Yeon
authors: SY
authors: Lee
authors: Seon-Hong
authors: SH
authors: Kim
authors: Soo-Min
authors: SM
authors: Lee
authors: Mi
authors: M
authors: Kwon
authors: In-Gyu
authors: IG
authors: Choi
mesh_terms: D001487:Basidiomycota / Q000378:metabolism*; D001673:Biodegradation, Environmental; D011078:Polychlorinated Biphenyls / Q000378:metabolism*
chemical_list: D011078:Polychlorinated Biphenyls