Biodegradação do pesticida organofosfato profenófos por fungos marinhos

Resumo

In this study, seven marine fungal strains (Aspergillus Sydowii CBMAI 934, Penicillium raistrickii CBMAI 931, Aspergillus Sydowii CBMAI 935, Penicillium raistrickii CBMAI 1235, Penicillium desaturase CBMAI 1234, Aspergillus sydowii CBMAI 1241, Trichoderma sp. CBMAI 932) were screened on solid medium of malt extract 2% with and without the pesticide profenófos. The marine fungi that grow well on solid medium containing this organophosphate can show potential to promote the biodegradation of protenotos. In addition, the biodegradation reactions of the pesticide profenófos in liquid medium of malt extract 2% by marine fungi were investigated. The growth of fungi on solid medium in the presence of profenófos was assessed for a period of ten days, at three different concentrations of the pesticide (80.0, 160.0 and 240.0 ppm). The growth of fungi was assessed on solid medium by the colony aspect and size. Most fungi showed excellent growth at 10 days on solid medium in the presence of profenófos. It was observed that even at the highest concentration of pesticide (240 ppm), there was good growth of several fungi on solid medium. ln this screening, the marine fungi P. raistrickii CBMAI 931, A. sydowii CBMAI 935, A. sydowii CBMAI 1241 and Trichoderma sp. CBMAI 932 showed better growth, in the presence of profenófos, than the other fungi strains. (AU)