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Science 19 March 1993:
Vol. 259. no. 5102, pp. 1757 - 1760
DOI: 10.1126/science.7681219
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Articles

Science, Vol 259, Issue 5102, 1757-1760
Copyright © 1993 by American Association for the Advancement of Science

articles

Microbial competition: Escherichia coli mutants that take over stationary phase cultures

MM Zambrano, DA Siegele, M Almiron, A Tormo, and R Kolter

Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115.

Many microorganisms, including Escherichia coli, can survive extended periods of starvation. The properties of cells that survived prolonged incubation in stationary phase were studied by mixture of 10-day-old (aged) cultures with 1-day-old (young) cultures of the same strain of Escherichia coli. Mutants from the aged cultures that could grow eventually took over the population, which resulted in the death of the cells from the young cultures. This phenotype was conferred by mutations in rpoS, which encodes a putative stationary phase-specific sigma factor. These rapid population shifts have implications for the studies of microbial evolution and ecology.


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   Abstract »    Full Text »
The L-Isoaspartyl Protein Repair Methyltransferase Enhances Survival of Aging Escherichia coli Subjected to Secondary Environmental Stresses.
J. E. Visick, H. Cai, and S. Clarke (1998)
J. Bacteriol. 180, 2623-2629
   Abstract »    Full Text »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)