| To analyze the degradation properties of four oil-degradation fungi, the mycelial growth rates on the solid medium, the dry mycelial weights from the liquid medium and the degradation rates of the crude oil in the liquid medium and the oil in the soil were determined. The mycelial growth rate and the dry mycelial weight of J12（Fusarium sp.） were the largest. After 30 d cultivation in the liquid medium with the crude oil, the results by GC-MS showed that J12 could mainly degrade linear hydrocarbons C16~C31. Compared with the crude oil, two aromatic hydrocarbons C10 appeared in the degradation products of J12 and the media without any inoculation. J3（Bionectria sp.） and J4（Stachybotrys sp.） could completely degrade aromatic hydrocarbons and branched hydrocarbons of the crude oil. J4 could completely degrade linear hydrocarbon C33, C16H22O4 and linear hydrocarbon C14 were detected in its oil-degradation products. J11（Fusarium sp.） could completely degrade aromatic hydrocarbons C10, linear hydrocarbons C16 and C26. Two C16H22O4 were detected in its degradation products. Combined with the components analysis of the oil in the soil, aromatic hydrocarbons C7 and C10 may be the intermediate products of the oil degradation. The oil degradation rates of J12 in the liquid medium and the soil were the highest. They were 64.25% and 30.58%, respectively. The oil degradation rates in liquid medium were higher than those in the soil except J3 after 30 d degradation. The correlation analysis showed that the oil degradation rate related to fungal species and the components of the oil, not relevant with the growth characteristics of the fungi. |
