[Genetic activity of sim-triazine herbicides on Saccharomyces cerevisiae yeast strains].

Triazine chloro derivatives: atrazine, simazine manifest no mutagenic and recombinogenic properties in yeasts; triazine methylthio derivatives: prometryne, semeron (desmetryne) generate both genetic events with low concentrations of 0.5 and 5 mg/l. It is found that prometryne is more able to generate point mutations, while semeron--to generate mitotic recombinations. In this case frequency of experimental prototrophs is twice higher than the control level.