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首页> 美国卫生研究院文献>other >Degradation of Bunker C Fuel Oil by White-Rot Fungi in Sawdust Cultures Suggests Potential Applications in Bioremediation
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Degradation of Bunker C Fuel Oil by White-Rot Fungi in Sawdust Cultures Suggests Potential Applications in Bioremediation

机译：木屑培养物中白腐菌对船用碳燃料油的降解表明其在生物修复中的潜在应用

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Fungal lignocellulolytic enzymes are promising agents for oxidizing pollutants. This study investigated degradation of Number 6 “Bunker C” fuel oil compounds by the white-rot fungi Irpex lacteus, Trichaptum biforme, Phlebia radiata, Trametes versicolor, and Pleurotus ostreatus (Basidiomycota, Agaricomycetes). Averaging across all studied species, 98.1%, 48.6%, and 76.4% of the initial Bunker C C10 alkane, C14 alkane, and phenanthrene, respectively were degraded after 180 days of fungal growth on pine media. This study also investigated whether Bunker C oil induces changes in gene expression in the white-rot fungus Punctularia strigosozonata, for which a complete reference genome is available. After 20 days of growth, a monokaryon P. strigosozonata strain degraded 99% of the initial C10 alkane in both pine and aspen media but did not affect the amounts of the C14 alkane or phenanthrene. Differential gene expression analysis identified 119 genes with ≥ log2(2-fold) greater expression in one or more treatment comparisons. Six genes were significantly upregulated in media containing oil; these genes included three enzymes with potential roles in xenobiotic biotransformation. Carbohydrate metabolism genes showing differential expression significantly accumulated transcripts on aspen vs. pine substrates, perhaps reflecting white-rot adaptations to growth on hardwood substrates. The mechanisms by which P. strigosozonata may degrade complex oil compounds remain obscure, but degradation results of the 180-day cultures suggest that diverse white-rot fungi have promise for bioremediation of petroleum fuels.
机译：真菌木质纤维素分解酶是用于氧化污染物的有前途的试剂。这项研究调查了白腐真菌Irpex lacteus，Trichaptum biforme，Phlebia radiata，Trametes versicolor和Pleurotus ostreatus（Basidiomycota，Agaricomycetes）对6号“ Bunker C”燃料油化合物的降解作用。在所有研究物种中，最初的Bunker C C10烷烃，C14烷烃和菲在松树培养基上生长180天后平均降解，分别降低了98.1％，48.6％和76.4％。这项研究还调查了Bunker C油是否诱导白腐真菌Punctularia strigosozonata中基因表达的变化，为此可获得完整的参考基因组。生长20天后，单核斑纹单胞菌菌株在松树和白杨培养基中降解了初始C10烷烃的99％，但不影响C14烷烃或菲的量。在一项或多项治疗比较中，差异基因表达分析确定了119个具有≥log2（2倍）表达的基因。六个基因在含油培养基中显着上调。这些基因包括三种在异源生物转化中具有潜在作用的酶。显示差异表达的碳水化合物代谢基因在白杨和松树基质上显着积累了转录本，这可能反映了白腐适应硬木基质上的生长。 P. strigosozonata降解复杂油类化合物的机制仍然不清楚，但是180天培养物的降解结果表明，多种白腐真菌有望对石油燃料进行生物修复。

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