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白腐真菌Phanerochaete sordida YK-624对多氯代二苯并对二噁英和多氯代二苯并呋喃的降解作用

Degradation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans by the white rot fungus Phanerochaete sordida YK-624.

作者信息

Takada S, Nakamura M, Matsueda T, Kondo R, Sakai K

机构信息

Fukuoka Institute of Health and Environmental Sciences, Japan.

出版信息

Appl Environ Microbiol. 1996 Dec;62(12):4323-8. doi: 10.1128/aem.62.12.4323-4328.1996.

Abstract

A method for the degradation of dioxins by white rot fungi was developed. Degradation of a mixture of 10 kinds of tetra- to octachlorodibenzo-p-dioxins (polychlorinated dibenzo-p-dioxins [PCDDs]) and tetra- to octachlorodibenzofurans (polychlorinated dibenzofurans [PCDFs]), which were chlorinated at 2-, 3-, 7-, and 8-positions of the molecules, by the white rot fungus Phanerochaete sordida YK-624 was studied in a stationary low-nitrogen medium. The percent degradation values of PCDDs and PCDFs were approximately 40 (tetra-chloro-) to 76% (hexachloro-) and 45 (tetrachloro-) to 70% (hexachloro-), respectively. Metabolites of 2,3,7,8-tetra- and octaCDD formed by P. sordida YK-624 included 4,5-dichlorocatechol and tetrachlorocatechol, respectively. These results suggest that white rot fungus is able to substantially degrade both PCDDs and PCDFs. This is the first report of the degradation of highly chlorinated PCDDs and PCDFs by a microorganism.

摘要

开发了一种利用白腐真菌降解二噁英的方法。研究了在固定低氮培养基中,白腐真菌黄孢原毛平革菌YK - 624对10种分子中2、3、7和8位被氯化的四至八氯二苯并 - p - 二噁英(多氯二苯并 - p - 二噁英[PCDDs])和四至八氯二苯并呋喃(多氯二苯并呋喃[PCDFs])混合物的降解情况。PCDDs和PCDFs的降解百分比分别约为40%(四氯 - )至76%(六氯 - )和45%(四氯 - )至70%(六氯 - )。黄孢原毛平革菌YK - 624形成的2,3,7,8 - 四氯和八氯二苯并二噁英的代谢产物分别包括4,5 - 二氯邻苯二酚和四氯邻苯二酚。这些结果表明白腐真菌能够大量降解PCDDs和PCDFs。这是关于微生物降解高氯PCDDs和PCDFs的首次报道。

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