BIODEGRADATION OF CRUDE OIL BY NEMATODE TRAPPING FUNGI ISOLATED FROM IRAQ

摘要

This is the first report around the world to determinate the capability of some species nematode trapping fungi to biodegrade of crude oil. The tested fungi have ability to biodegrade the crude oil. A.cookedickinson, A.microscaphoides, A.thaumasia and C.rosea recorded high ability to biodegrade of crude oil reached to 70-75% after 7 days incubation, whereas other tested fungi caused moderate susceptibility 30-35%. The ability of tested fungi to biodegrade of oil was slightly different after 30 days compare with their ability after 7 days. pH values decreased after 30 days of incubation of all fungal liquid media from 7.1 to 6.4 or 6.2 depending on the type of species. A.cookedickinson gave the highest fresh and dry weight reached to 8.83g and 0.52g respectively after 30 days of incubation, followed by A.thaumasia (7.565g fresh weight and 0.435g dry weight). A.oligospora gave the lowest fresh and dry weight of fungal mycelium to reach 3.23g and 0.185g respectively. On other hand, A.conoides showed inability to degrade oil compounds or growth on mineral salts medium.