Mutation induction in Escherichia coli WP2 uvrA by Cerenkov emission associated with 137Cs gamma irradiation.
Evidence is presented for the mutation of the tryptophan-requiring bacterial strain Escherichia coli WP2 uvrA from auxotrophy to prototrophy, and from streptomycin sensitivity to resistance, by Cerenkov emission associated with 137Cs gamma irradiation. Furthermore, the data strongly suggest a more than additive interaction between the gamma-induced damage and that induced by Cerenkov emission for both mutations scored. An additional observation is that mutant yields (expressed as mutants/10(7) survivors) show a dependence on the number of viable cells plated for both uv (254 nm) and Cerenkov-induced mutations, but not for those induced by gamma irradiation. This demonstrates another similarity between uv- and Cerenkov-induced damage.
D002588:Cesium Radioisotopes; D004926:Escherichia coli / Q000528:radiation effects*; D005720:Gamma Rays; D009154:Mutation; D011831:Radiation Genetics
D002588:Cesium Radioisotopes