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Appl Environ Microbiol. 1974 December; 28(6): 951-959
Copyright © 1975 American Society for Microbiology. All Rights Reserved.

Arthrobacter globiformis and Its Bacteriophage in Soil¹

Department of Microbiology, The Pennsylvania State University, University Park, Pennsylvania 16802

ABSTRACT

Bacteriophages in soil for Arthrobacter globiformis were rarely detected unless the soil was nutritionally amended and incubated. In amended soil, phage were continuously produced for at least 48 h, and this did not require the addition of host cells. Rod and spheroid stage host cells added to the amended soil encountered indigenous bacteriophage, but added phage did not encounter sensitive indigenous host cells for some time, if at all. The indigenous phage in nonincubated soil seemed to be present in a masked state which was not merely a loose physical adsorption to soil materials but required growth conditions other than lysogeny for them to increase their titers. The possibility is discussed that the indigenous host cells in nonamended soil are present in a nonsensitive spheroid state, with the cells becoming sensitive to the phage in a rate-limiting fashion as nonsynchronous outgrowth occurs for a portion of the spheroid cells.

¹ This research was authorized for publication as paper no. 4746 in the journal series of the Pennsylvania Agricultural Experiment Station.