publication . Other literature type . Article . 1981

Structured habitats and the evolution of anticompetitor toxins in bacteria.

Lin Chao; Bruce R. Levin;
Open Access
  • Published: 01 Oct 1981
Abstract
Abstract We demonstrate that in liquid cultures, defined in this study as a mass habitat, the outcome of competition between Escherichia coli that produce an antibacterial toxin (colicin) and sensitive E. coli is frequency dependent; the colicinogenic bacteria are at an advantage only when fairly common (frequencies in excess of 2 X 10(-2)). However, we also show that in a soft agar matrix, a structured habitat, the colicinogenic bacteria have an advantage even when initially rare (frequencies as low as 10(-6)). These contrasting outcomes are attributed to the colicinogenic bacteria's lower intrinsic growth rate relative to the sensitive bacteria and the differe...
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Subjects
free text keywords: Research Article, Inhibition zone, Colicin, Microbiology, Habitat, Escherichia coli, medicine.disease_cause, medicine, Bacteria, biology.organism_classification, biology, Soft agar, Liquid culture, Toxin
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