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Literature DB >> 8368861

Starved cells of the fatty acid auxotroph Escherichia coli AK7 develop abnormal sensitivity to media with low osmolarity.

O R Scaravaglio¹, R N Farías, E M Massa.

Abstract

The unsaturated fatty acid auxotroph Escherichia coli AK7 supplied with linolenic acid, while appearing normal during logarithmic growth, showed a fast decline in CFU during starvation as a result of an osmotic downshift when transferred to standard agar plates unsupplemented with an osmolyte such as 300 mosM sucrose or salt (NaCl or KCl). The starved cells could recover their osmoresistance when an energy source was added to the starvation medium.

Entities: Chemical Species

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Year: 1993 PMID： 8368861 PMCID： PMC182357 DOI： 10.1128/aem.59.8.2760-2762.1993

Source DB: PubMed Journal: Appl Environ Microbiol ISSN： 0099-2240 Impact factor: 4.792

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References

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Starved cells of the fatty acid auxotroph Escherichia coli AK7 develop abnormal sensitivity to media with low osmolarity.

1. Starvation-induced cross protection against osmotic challenge in Escherichia coli.

2. Starvation-induced cross protection against heat or H2O2 challenge in Escherichia coli.

3. The putative sigma factor KatF has a central role in development of starvation-mediated general resistance in Escherichia coli.

4. Influence of unsaturated fatty acid membrane component on sensitivity of an Escherichia coli fatty acid auxotroph to conditions of nutrient depletion.

5. Identification of a central regulator of stationary-phase gene expression in Escherichia coli.

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9. Genetic and biochemical analyses of Escherichia coli mutants altered in the temperature-dependent regulation of membrane lipid composition.

10. Plasmid-mediated uptake and metabolism of sucrose by Escherichia coli K-12.