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Spadaro, J.T. (Oregon Graduate Institute of Science and Technology, Beaverton, OR); Gold, M.H; Renganathan, V
Applied and Environmental Microbiology, 08/1992, Volume: 58, Issue: 8Journal Article
Under nitrogen-limiting, secondary metabolic conditions, the white rot basidiomycete Phanerochaete chrysosporium extensively mineralized the specifically 14C-ring-labeled azo dyes 4-phenylazophenol, 4-phenylazo-2-methoxyphenol, Disperse Yellow 3 2-(4'-acetamidophenylazo)-4-methylphenol, 4-phenylazoaniline, N,N-dimethyl-4-phenylazoaniline, Disperse Orange 3 4-(4'-nitrophenylazo)-aniline, and Solvent Yellow 14 (1-phenylazo-2-naphthol). Twelve days after addition to cultures, the dyes had been mineralized 23.1 to 48.1%. Aromatic rings with substituents such as hydroxyl, amino, acetamido, or nitro functions were mineralized to a greater extent than unsubstituted rings. Most of the dyes were degraded extensively only under nitrogen-limiting, ligninolytic conditions. However, 4-phenylazo-U-14Cphenol and 4-phenylazo-U-14C2-methoxyphenol were mineralized to a lesser extent under nitrogen-sufficient, nonligninolytic conditions as well. These results suggest that P. chrysosporium has potential applications for the cleanup of textile mill effluents and for the bioremediation of dye-contaminated soil
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