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J Gen Virol 6 (1970), 421-427; DOI 10.1099/0022-1317-6-3-421
© 1970 Society for General Microbiology
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Induction of Defective and Temperate Bacteriophages in Caulobacter

Linda J. Driggers and Jean M. Schmidt

Department of Botany and Microbiology, Arizona State University, Tempe, Arizona, 85281, U.S.A.

Bacteriophage-like particles were induced from 6 of 21 strains of stalked bacteria, using mitomycin C or ultraviolet irradiation as the inducing agents. The phage inductions were observed in strains of Caulobacter crescentus, C. vibrioides and C. bacteroides. The phage-like particles were observed, using electron microscopy. Two of the phage-like entities, tentatively designated defective phages, could not be propagated on any of 21 potential host strains tested, nor did they possess bacteriocin activity. Host strains which permitted lytic cycles of phage replication were found for four induced phages. These bacteriophages contained double-stranded DNA. The bacterial strains from which they were induced were resistant to infection by their respective phage. Four bacterial strains were treated with specific antiphage serum, but clones so treated retained their capacity to produce the phages. The inefficacy of antiphage serum in curing the bacteria of phage suggested that these Caulobacter strains were lysogenic.

Received 20 October 1969; accepted 6 November 1969.


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L. Shapiro, N. Agabian-Keshishian, and I. Bendis
Bacterial Differentiation
Science, September 3, 1971; 173(4000): 884 - 892.
[Abstract] [PDF]


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