Potential of fungal co-culturing for accelerated biodegradation of petroleum hydrocarbons in soil

作者：Yanto Dede Heni Yuli; Tachibana Sanro^*

来源：Journal of Hazardous Materials, 2014, 278: 454-463.

DOI：10.1016/j.jhazmat.2014.06.039

• Biodegradation
• Dioxygenase
• Fungal co-culture
• Ligninolytic enzymes
• Petroleum hydrocarbons

The potential of fungal co-culture of the filamentous Pestalotiopsis sp. NG007 with four different basid-iomycetes - Trametes versicolor U97, Pleurotus ostreatus PL1, Cerena sp. F0607, and Polyporus sp. S133 - for accelerating biodegradation of petroleum hydrocarbons (PHCs) was studied using three different physicochemical characteristic PHCs in soil. All the combinations showed a mutual intermingling mycelial interaction on the agar plates. However, only NG007/S133 (50/50) exhibited an optimum growth rate and enzymatic activities that supported the degradation of asphalt in soil. The co-culture also degraded all fractions at even higher concentrations of the different PHCs. In addition, asphaltene, which is a difficult fraction for a single microorganism to degrade, was markedly degraded by the co-culture, which indicated that the simultaneous biodegradation of aliphatic, aromatic, resin, and asphaltene fractions had occurred in the co-culture. An examination of in-vitro degradation by the crude enzymes and the retrieval fungal culture from the soil after the experiment confirmed the accelerated biodegradation due to enhanced enzyme activities in the co-culture. The addition of piperonyl butoxide or AgNO3 inhibited biodegradation by 81-99%, which demonstrated the important role of P450 monooxygenases and/or dioxygenases in the initial degradation of the aliphatic and aromatic fractions in PHCs.

• 出版日期2014-8-15