GLYPHOSATE TOLERANCE OF FUNGAL STRAINS ISOLATED FROM AGRICULTURAL SOILS.

ALUFFI MELISA; MAGNOLI KAREN; REGÑICOLI JUAN; BENITO NICOLÁS; CARRANZA CECILIA; CHIACCHIERA STELLA; BARBERIS CARLA; MAGNOLI CARINA

La Falda, Córdoba

Jornada; XXI Jornadas Científicas de la Sociedad de Biología de Córdoba; 2017

Sociedad de Biología de Córdoba

The use of agricultural pesticides as increased during the past years for insect, pest and diseases control in Argentina. The organophosphonates as glyphosate are biogenic and xenobiotic compounds characterized by the presence of a stable carbon to phosphorus (C-P) bond. The C-P bond imparts upon these molecules a relative resistance to degradation and concern has been expressed over their environmental impact and possible ecotoxicity. That´s why the need to develop bioremediation methods capable of degrading GP. The aims of this study was evaluated the effect of several doses of GP on growth parameters of different fungal strains isolated from agricultural soils. Twenty fungal strains were isolated from soil trough an enrichment method and growth parameters were evaluated at different GP concentrations (0, 5, 20, 50 and 100 mM) at 0.98 of water activity on Czapek-Dox medium. It was generally observed that, when GP concentration increased, the lag phase of all strains tested increased to. The strains with the highest growth rate on treatment with 100 mM of GP were: C166 (Mucor spp.), C2 (Aspergillus spp.) C140 and C311 (Trichoderma spp.). Growth rates and lag phases were: 4.13; 4.15; 5.01 and 6.39 mm / day and 9.65 ± 9.77; 20.06 ± 5.92; 46.2 ± 2.4 and 32.69 ± 3.2 h respectively. These results show that these strains could integrate a microbial consortium capable to tolerate and degrade glyphosate on soil.