4.7 Article

Biotransformation of dichloro-, trichloro-, and tetrachlorodibenzo-p-dioxin by the white-rot fungus Phlebia lindtneri

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APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 68, 期 4, 页码 560-566

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SPRINGER
DOI: 10.1007/s00253-005-1947-9

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The model polychlorinated dibenzo-p-dioxins (PCDDs) 2,7-dichloro-,2,3,7-trichloro,1,2,6,7-,1,2,8,9-, and 1,3,6,8-tetrachlorodibenzo-p-dioxin were used as substrates for a degradation experiment with the white-rot fungus Phlebia lindtneri. 2,7-Dichlorodibenzo-p-dioxin (2,7-diCDD) was biotransformed to hydroxylated diCDD and methoxylated diCDD. With the exception of 1,3,6, 8-tetrachlorodibenzo-p-dioxin, the tri- and tetrachlorodibenzo-p-dioxins were biotransformed to hydroxyl and methoxyl compounds by P lindtneri. The degradation rate of 1,2,6,7-tetrachlorodibenzo-p-dioxin was higher than that of 2,3,7-trichlorodibenzo-p-dioxin and no degradation of 1,3,6,8-tetrachlorodibenzo-p-dioxin was observed. These results indicate that the degradation of these PCDDs depends on the chlorination patterns of the substrates. This is the first report of the hydroxylation and methoxylation of tri- to tetra-CDDs by a fungal strain.

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