Abstracts |
The research method of mycology was used to study the growth of 7 ectomycorrhizal fungal strains in different crude-oil concentration media and their oil-degradation effects. The results show as follows: a. Different strains have different growth rate in the same oil concentration medium, and the growth of the same strain in different oil concentration media is also different. Strain 010 and strain 025 grow faster than other strains in different oil concentrations media. The mycelial dry weight of strain 010 increases with the increase of oil concentration, and when the concentration is 500 mg/L, its mycelial dry weight reaches the maximum, 5.27% higher than the control, indicating that oil has promoting effect on its growth; The mycelial dry weight is lower than the control when oil concentration is 700 mg/L, and the growth of strain decreases with the increase of oil concentration. Oil concentration has greater effect on the growth of strain 025. The mycelial dry weight is 9.1% lower than the control when oil concentration is 100 mg/L. With the increase of oil concentration, strain 025 grows faster. The mycelial dry weight is higher than the control when oil concentration is 500 mg/L; The maximum mycelial dry weight is 25.65% higher than the control when oil concentration is 700 mg/L; With the increase of oil concentration, growth tends to decrease. b. Different strains have different oil-degradation effects in the same oil concentration medium, and oil degradation effects of the same strain in different oil concentration media are also different. Strain 025 has the highest oil-degradation effect, and its oil-degradation rate increases with the increase of oil concentration. The highest oil degradation rate is 73.65% when oil concentration is 900 mg/L. c. The growth of strains 010, 009, 035, LH004 and their oil-degradation effects are positively correlated. |