Metabolic activity of permafrost bacteria below the freezing point.

  title={Metabolic activity of permafrost bacteria below the freezing point.},
  author={Elizaveta M Rivkina and E. Imre Friedmann and Christopher P McKay and David A. Gilichinsky},
  journal={Applied and environmental microbiology},
  volume={66 8},
Metabolic activity was measured in the laboratory at temperatures between 5 and -20 degrees C on the basis of incorporation of (14)C-labeled acetate into lipids by samples of a natural population of bacteria from Siberian permafrost (permanently frozen soil). Incorporation followed a sigmoidal pattern similar to growth curves. At all temperatures, the log phase was followed, within 200 to 350 days, by a stationary phase, which was monitored until the 550th day of activity. The minimum doubling… CONTINUE READING
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