Abstract
The present study was conducted to reveal the effect of crude oil on some fungal sp ecies
isolation from soil in order to evaluate the role of these fungi in environmental balance of soil .
The results showed a variation in numbers and percentage of the fungal isolates Aspergillus
fumigatus dominated over all isolates with a frequency of (32.47) . In respect of the effect of
different concentrations of the crude oil, low concentrations (0.05, 0.1) % showed no effect on
radial growth ( mean colony diameter) of the isolated fungi grown on solid media , whereas other
concentrations (5.10)% showed gradual toxic effect on these fungi . The fungus Aspergillus
fumigatus reveal higher sensitivity against all concentrations of the crude oil compared to
others sp ecies , The results showed also variation of these fungi in utilization of the crude
oil on solid mineral media used as a sole carbon and energy source with the different
concentrations of the crude oil , exposing time and kind of species.
isolation from soil in order to evaluate the role of these fungi in environmental balance of soil .
The results showed a variation in numbers and percentage of the fungal isolates Aspergillus
fumigatus dominated over all isolates with a frequency of (32.47) . In respect of the effect of
different concentrations of the crude oil, low concentrations (0.05, 0.1) % showed no effect on
radial growth ( mean colony diameter) of the isolated fungi grown on solid media , whereas other
concentrations (5.10)% showed gradual toxic effect on these fungi . The fungus Aspergillus
fumigatus reveal higher sensitivity against all concentrations of the crude oil compared to
others sp ecies , The results showed also variation of these fungi in utilization of the crude
oil on solid mineral media used as a sole carbon and energy source with the different
concentrations of the crude oil , exposing time and kind of species.