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Appl. Environ. Microbiol., Jan 1996, 292-295, Vol 62, No. 1
Copyright © 1996, American Society for Microbiology

Mineralization of Polycyclic Aromatic Hydrocarbons by the White Rot Fungus Pleurotus ostreatus

L Bezalel, Y Hadar and CE Cerniglia
Department of Plant Pathology and Microbiology, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel, and Microbiology Division, National Center for Toxicological Research, Food and Drug Administration, Jefferson, Arkansas 72079

The white rot fungus Pleurotus ostreatus was able to mineralize to (sup14)CO(inf2) 7.0% of [(sup14)C]catechol, 3.0% of [(sup14)C]phenanthrene, 0.4% of [(sup14)C]pyrene, and 0.19% of [(sup14)C]benzo[a]pyrene by day 11 of incubation. It also mineralized [(sup14)C]anthracene (0.6%) much more slowly (35 days) and [(sup14)C]fluorene (0.19%) within 15 days. P. ostreatus did not mineralize fluoranthene. The activities of the enzymes considered to be part of the ligninolytic system, laccase and manganese-inhibited peroxidase, were observed during fungal growth in the presence of the various polycyclic aromatic hydrocarbons. Although activity of both enzymes was observed, no distinct correlation to polycyclic aromatic hydrocarbon degradation was found.


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