Characterization of microorganisms isolated from soil contaminated with Glyphosate in southern Brazil.

Abstract

Glyphosate is one of the most commonly used pesticides in Brazil, and it is related to health
issues and environmental problems. Thus, the present study aimed to make a preliminary
study on the interaction of the pesticide with the microbiota, the objective was to isolate fungi
and bacteria, identify the fungi from a glyphosate contaminated soil, which indicate glyphosate
degradation potential. The soil samples were collected randomly, homogenized and transferred
to a flask with mineral medium supplemented glyphosate. Then, we performed three
subsequent transfers, (1 mL) every 5 days, at 28° C, plaque counting was done. Bacteria and
fungi morphologically different were isolated. It was possible to identify eight different genera of
fungi. The results suggest that the isolated microorganisms are tolerant and may present high
glyphosate degradation potential and could be use in further bioremediation studies of soils
contaminated with this pesticide.