1887

Abstract

SUMMARY: A population of , strain W107, exposed for several growth cycles to a sterile culture filtrate of , strain M142, acquired several genetic characteristics similar to those of strain M142. The changes observed were: (1) streptomycin sensitivity to resistance; (2) bacteriophage V sensitivity to resistance ; (3) absence to presence of soluble pigment; (4) presence to absence of pigment in the vegetative mycelium. The filtrate contained streptomycin and a temperate bacteriophage. The low concentration of streptomycin did not grossly inhibit the growth of strain W107 but streptomycin-resistant mutants were selected. Resistance to the temperate phage frequently conferred resistance to bacteriophage V. The observed morphological changes were coupled with bacteriophage- and streptomycin- susceptibility. Vegetative hybridization was the result of selection of mutants rather than gene transfer.

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/content/journal/micro/10.1099/00221287-18-3-591
1958-06-01
2022-01-21
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