By Richard E. Lenski (auth.), K. C. Marshall (eds.)
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Extra resources for Advances in Microbial Ecology
The various studies differed somewhat in culture conditions. Most notably, Paynter and Bungay (\969) used broth at 30°C, whereas all others used minimal media at 37°C. 3 turnover/hr. R. Lenski 100 300 200 400 500 TlME(hr) Figure 3. Dynamics of the interaction between E. coli B and virulent phage T4 in chemostat culture. Solid line gives bacterial density; dashed line gives phage density. [From Lenski and Levin (1985, Fig. 1), with permission of The American Naturalist. ] same medium either prior to the addition of virulent phage or subsequent to the evolution of resistant bacteria.
V. Evans (unpublished data)]. phage MS2. Physiological protection against phage adsorption, though less dramatic, has also been demonstrated for other phage. Recall, for example, that phage Lambda adsorbs to receptors involved in the uptake of maltose, and that there can be considerable variation among bacteria in the number of these receptors, especially when bacteria are grown on other carbon sources. Physiological refuges may also arise as the consequence of starvation of bacteria (Delbruck, 1940a), depletion of a factor in the medium required for phage adsorption (Luria and Steiner, 1954), or bacterial clumping (Paynter and Bungay, 1970).
Only phage population densities are shown; these were obtained just prior to daily transfers [R. E. Lenski, P. R. Levin, and R. V. Evans (unpublished data)]. phage MS2. Physiological protection against phage adsorption, though less dramatic, has also been demonstrated for other phage. Recall, for example, that phage Lambda adsorbs to receptors involved in the uptake of maltose, and that there can be considerable variation among bacteria in the number of these receptors, especially when bacteria are grown on other carbon sources.
Advances in Microbial Ecology by Richard E. Lenski (auth.), K. C. Marshall (eds.)