Fungal biodiversity of water and sediments in some aquatic systems in Basrah Province and their capabilities to degrade methyl orange

Fungal diversity Methyl orange Biodegradation Aspergillus

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June 25, 2023

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This study investigates the fungal biodiversity of water and sediment samples from some waterbodies and their ability to degrade Methyl orange (M.O.) on a solid medium. Ten fungal genera were isolated, and the genus Aspergillus represented the highest percentage (70%). Sixteen fungal species were isolated that 88% of which (14 species) belonged to anamorphic fungi. Trichoderma sp. showed the highest percentage (40%). Out of the 16 isolated fungi, Aspergillus flavus, A. niger, and A. terreus showed the best result for decolourising M.O. on a solid medium potato dextrose agar. These fungi isolates were selected to test their ability to biodegrade M.O. in a liquid medium supplemented with 50 mg.L-1 M.O. as the sole carbon source. Based on the results, after 7 days of incubation, A. niger degraded 14% of M.O., while A. flavus and A. terreus degraded 12% of the dye.