alexa Biodegradation of fluoranthene by basidiomycetes fungal isolate Pleurotus ostreatus HP-1.
Chemical Engineering

Chemical Engineering

Journal of Bioprocessing & Biotechniques

Author(s): Patel H, Gupte A, Gupte S

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Abstract The biodegradation of fluoranthene, a high molecular weight polycyclic aromatic hydrocarbon (PAH), was investigated in submerged culture using the wood decaying fungus isolated from forest locality in Gujarat, India. The basidiomycete fungal isolate was found to have an ability to grow on sabaroud dextrose agar containing 50 mgl(-1) of each naphthalene, anthracene, acenaphthene, benzo (a) anthracene, pyrene, flouranthene, carbazole, and biphenyl. The involvement of extracellular fungal peroxidases such as manganese peroxidase (MnP) and laccase (Phenol oxidase) in the degradation of fluoranthene was studied. On the eighth day of incubation 54.09\% of 70 mg l(-1) fluoranthene was removed. There after no PAHs removal was observed till the 20th day of the incubation period. The isolate was identified as Pleurotus ostreatus by 18S rRNA, 5.8S rRNA, and partial 28S rRNA gene sequencing. To the best of our knowledge this is the first time Pleurotus ostreatus have been reported to degrade such a high concentration of fluoranthene within much lower time period of incubation. Depletion in the residual fluoranthene in the culture medium was determined by HPLC. Attempts were made to identify the degradation product in the culture medium with the help of FT-IR, NMR, and HPTLC analysis. In the present study positive correlation between fluoranthene degradation and the ligninolytic enzyme (MnP and laccase) production is observed, thus this isolate can play an effective role for bioremediation of PAHs contaminated sites. This article was published in Appl Biochem Biotechnol and referenced in Journal of Bioprocessing & Biotechniques

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