Physiological response to the action of the agrotoxic 2,4-Dichlorophenoxiacetic acid in Saccharomyces cerevisiae

The presence of xenobiotic compounds in the environment is responsible for impacts on ecosystem. An example pesticides that pose risks to non-target species, such as microorganisms present soil and are cycling nutrients, some can be used measure effects these compounds, yeasts because when exposed toxic substances begin changes physiological genetic mechanisms. Thus, this study aims evaluate toxicity effect 2,4-D pesticide Pedra-2 (PE-2) Fleischmann® (FLE) yeasts. dilutions 2.0; 4.0 6.0 µg L-1 were added a solution prepared with 20 ml ultra-pure water 2.0 g sucrose where grown. phenotypic profile against compound was evaluated quantitatively cell viability. Using methylene blue method qualitatively growth tests Petri dishes containing 2% YPD medium flocculation slides blue. Yeasts showed loss viability FLE strain greater sensitivity, cellular yeast also more affected and, consequently, presented higher rates. data show longer exposure time doses concentrations interfered response yeast. we suggest microorganism has potential considered environmental analyses bioindicator.