Starved cells of the fatty acid auxotroph Escherichia coli AK7 develop abnormal sensitivity to media with low osmolarity.
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.
Scaravaglio
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Departamento Bioquímica de la Nutrición del Instituto Superior de Investigaciones Biológicas (Consejo Nacional de Investigaciones Cientificas y Tecnicas-Universidad Nacional de Tucumán), San Miguel de Tucumán, Argentina.
Farías
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Massa
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D003470:Culture Media; D004926:Escherichia coli / Q000254:growth & development / Q000378:metabolism*; D005227:Fatty Acids / Q000378:metabolism*; D005990:Glycerol / Q000378:metabolism; D008042:Linolenic Acids / Q000378:metabolism; D019301:Oleic Acid; D009829:Oleic Acids / Q000378:metabolism; D009994:Osmolar Concentration
D003470:Culture Media; D005227:Fatty Acids; D008042:Linolenic Acids; D009829:Oleic Acids; D019301:Oleic Acid; D005990:Glycerol