Publication Date:
1999-12-11
Description:
Analysis of a portion of Vostok ice core number 5G, which is thought to contain frozen water derived from Lake Vostok, Antarctica (a body of liquid water located beneath about 4 kilometers of glacial ice), revealed between 2 x 10(2) and 3 x 10(2) bacterial cells per milliliter and low concentrations of potential growth nutrients. Lipopolysaccharide (a Gram-negative bacterial cell biomarker) was also detected at concentrations consistent with the cell enumeration data, which suggests a predominance of Gram-negative bacteria. At least a portion of the microbial assemblage was viable, as determined by the respiration of carbon-14-labeled acetate and glucose substrates during incubations at 3 degrees C and 1 atmosphere. These accreted ice data suggest that Lake Vostok may contain viable microorganisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karl, D M -- Bird, D F -- Bjorkman, K -- Houlihan, T -- Shackelford, R -- Tupas, L -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2144-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Ocean and Earth Science and Technology (SOEST), University of Hawaii, Honolulu, HI 96822, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591643" target="_blank"〉PubMed〈/a〉
Keywords:
Acetates/metabolism
;
Adenosine Triphosphate/analysis
;
Antarctic Regions
;
Bacteria/*isolation & purification
;
Bacterial Physiological Phenomena
;
Bacterial Proteins/metabolism
;
Biomass
;
Colony Count, Microbial
;
Ecosystem
;
Flow Cytometry
;
Fresh Water/*microbiology
;
Glucose/metabolism
;
Gram-Negative Bacteria/*isolation & purification/physiology
;
*Ice
;
Lipopolysaccharides/analysis
;
Microscopy, Electron, Scanning
;
Microscopy, Fluorescence
;
Nucleic Acids/metabolism
;
Oxidation-Reduction
;
Water Microbiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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