Biphenyl oxide hydroxylation by Cunninghamella echinulata

Seigle‐Murandi, F.; Krivobok, Serge; Steiman, R.; Benoit-Guyod, Jean Louis A.; Thiault, G.

doi:10.1021/jf00002a041

Cited by 23 publications

(8 citation statements)

References 20 publications

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“…A good growth on solid medium did not always imply a good biodegradation in liquid medium. This phenomenon has been previously reported with growth on solid medium containing biphenyl oxide and 2-acetylthiophene biotransformation [22,23]. The isolate showed dark brown colored zone surrounding mycelial growth on orthodianisine containing SDA because of Bavendamm's reaction.…”

Section: Resultssupporting

confidence: 81%

Biodegradation of Fluoranthene by Basidiomycetes Fungal Isolate Pleurotus Ostreatus HP-1

Patel¹,

Gupte²,

Gupte³

2008

Appl Biochem Biotechnol

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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.

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Section: Resultssupporting

confidence: 81%

Biodegradation of Fluoranthene by Basidiomycetes Fungal Isolate Pleurotus Ostreatus HP-1

Patel¹,

Gupte²,

Gupte³

2008

Appl Biochem Biotechnol

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“…Masaphy et al 118) reported that P-450-mediated benzo-(a)pyrene hydroxylase activity, as well as the well-known lignolytic activity, could play a role in xenobiotic transformation by Phanerochaete chrysosporium. Hydroxylation or utilization as a carbon and energy source of DF, DE, and related aromatics has been reported in Cunninghamella elegans 32,150) , Cunninghamella echinulata 169) , Penicillium canescens 70) , Phlebia lindtneri 110,127) , Trichosporon beigelii 160) and Trichosporon mucoides 68) , although these reports have not always demonstrated the involvement of P-450. The proposed pathway for the early step of DF degradation by Trichosporon mucoides showed the formation of 2,3-hydroxyDF followed by the ring cleavage of this metabolite, leading to the formation of 2-(1-carboxy methylidene)-2,3-dihydrobenzo[b]-furanylidene glycolic acid 68) .…”

Section: Fungal Degradationmentioning

confidence: 99%

Biodiversity of Dioxin-Degrading Microorganisms and Potential Utilization in Bioremediation.

Hiraishi

2003

Microb. Environ.

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Dioxins are a group of chloroaromatic compounds known to be toxic and carcinogenic, and persistent environmental pollutants. How to remedy dioxin-polluted environments is one of the most challenging problems in environmental technology. From ecological and economical viewpoints, biological methods using particular microorganisms and microbial consortia capable of dioxin transformation and degradation have greater appeal than physicochemical methods in their application for environmental remediation. Large numbers of microorganisms capable of degrading dioxins and dioxin-like compounds have been isolated and characterized. Information about the biodiversity, ecophysiology and molecular biology of dioxin-degrading microorganisms has accumulated particularly during the past decade. There are three major modes of microbial degradation and transformation of dioxins; that is, oxidative degradation by aerobic bacteria containing aromatic hydrocarbon dioxygenases, reductive dechlorination by anaerobic microorganisms and fungal oxidation with cytochrome P-450, lignin peroxidases and laccases. This article overviews the current knowledge of microbial degradation and transformation of dioxins as well as the biodiversity of microorganisms involved. Strategies directed towards the bioremediation of dioxin-polluted environments are discussed.

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“…Rhodamine 6G is commonly used as a reagent before UV detection (179). TLC of biphenyloxide and metabolites on silica gel using various solvent systems and UV detection at 254 nm has been reported (182). HPTLC of about 150 insecticides and fungicides has been carried out.…”

Section: Visualization By Luminescencementioning

confidence: 99%