Literature DB >> 12662179

Reproduction and metabolism at - 10 degrees C of bacteria isolated from Siberian permafrost.

Corien Bakermans1, Alexandre I Tsapin, Virginia Souza-Egipsy, David A Gilichinsky, Kenneth H Nealson.   

Abstract

We report the isolation and properties of several species of bacteria from Siberian permafrost. Half of the isolates were spore-forming bacteria unable to grow or metabolize at subzero temperatures. Other Gram-positive isolates metabolized, but never exhibited any growth at - 10 degrees C. One Gram-negative isolate metabolized and grew at - 10 degrees C, with a measured doubling time of 39 days. Metabolic studies of several isolates suggested that as temperature decreased below + 4 degrees C, the partitioning of energy changes with much more energy being used for cell maintenance as the temperature decreases. In addition, cells grown at - 10 degrees C exhibited major morphological changes at the ultrastructural level.

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Year:  2003        PMID： 12662179     DOI： 10.1046/j.1462-2920.2003.00419.x

Source DB:  PubMed          Journal:  Environ Microbiol        ISSN： 1462-2912            Impact factor:   5.491


  35 in total

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