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Description:
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The effects of the defoliants arsenic trioxide and paraquat on the growth of Saccharomyces cerevisiae were studied . It was found that 10 and 10 M concentrations of the defoliants did not significantly inhibit the growth of the distiller's yeast , while inhibition -3 -4 -3 was observed at 10 and 10 M concentrations . At 10 M concentrations of both defoliants , the growth of the yeast was inhibited completely in both tryptic soy broth and in a semi -synthetic medium containing glucose as the carbon source . Growth curves revealed an immediate toxic effect on yeasts grown in paraquat -treated media , while the number of viable cells remained constant for a short period of time in media containing arsenic trioxide . |