Glyphosate effect on growth in modified Czapec medium of Aspergillus Flavus. Determination of residual pesticide concentration.

CARRANZA M.C.; BARBERIS C.L.; BERGESIO M.V.; CHIACCHIERA S.M.; MAGNOLI C.E,

Córdoba

Congreso; XIX Jornadas Científicas; 2013

Sociedad de Biología de Córdoba

Glyphosate is an important herbicide used in different crops in our region. Filamentous fungi are a powerful tool in the pesticide bioremediation from soil. The in vitro effect of different concentrations of glyphosate (5 to 30 mM) on growth of a non-toxigenic A. flavus strain was evaluated under three water activities (aw) (0.995, 0.98 and 0.98). The residual concentration of the herbicide on media was calculated. In general, fungi biomass was higher in each herbicide concentrations than in the control treatment at all aW assayed. At 5 mM of glyphosate and 0.995 of aW< it was observed a pesticide reduction of 55% after 20 days of incubation. While, herbicide reductions of 91% and 88% were obtained at 0.98 and 0.95 of aW after 10 and 15 days of incubation, respectively. These results the capacity of A. flavus to develop in presence of glyphosate and degrade in vitro conditions.