Estudo das linhagens do fungo Fusarium FCG45 e FCG43 em testes de biodegradação de pesticida

Abstract

Green technologies stand out as a sustainable solution for the remediation of contaminated soils in the presence of native or genetically modified microorganisms and efficiently handle toxic compounds, such as organophosphates and organochlorines. Therefore, this study aimed to establish working concentrations for glyphosate biodegradation studies.  The parameters evaluated, the time for hyphae development was the biggest factor for the FCG43 fungus in the first 48h and 96 hours, with concentrations of 300 ppm inhibitory for the fungus. This behavior was also observed with FCG45, but also a growth stimulus at 300 ppm, which may be due to glyphosate being a carbon source and corresponding to being used by the microorganism. For dry mass results, high concentrations are inhibited due to pesticides in the liquid culture. This should mean that in some cultures the stabilization and availability of nutrients may be lower in solid media than in liquid media. The decision regarding biodegradability, the BOD/COD ratio values ​​demonstrated low biodegradability with values ​​lower than 0.5.