| Abstract: | Growing bacteria of the two strains of Salmonella typhimurium differing in the sensitivity levels to UV-light formed multinuclear non-septal filaments in the penicillin-containing nutrient medium. The maximum number of the lifefull filaments was formed by the 4th hour of incubation in the beaf-peptone broth at a temperature of 37 degrees C in the presence of 5 gamma/ml of penicillin. The strains exposed to penicillin were less sensitive to UV-light. Exclusion of penicillin from the nutrient medium resulted in a new division of the filamentous cells and reduction of the initial UV-light sensitivity level. It was concluded that the low UV-light sensitivity level of the filaments induced by penicillin was associated with their multinuclear state. |
