PMID: 11607462Mar 1, 1994Paper

Thermophilic, anaerobic bacteria isolated from a deep borehole in granite in Sweden

Proceedings of the National Academy of Sciences of the United States of America
U SzewzykT A Stenström

Abstract

A borehole drilled to a total depth of 6779 m in granitic rock in Gravberg, Sweden, was sampled and examined for the presence of anaerobic, thermophilic, fermenting bacteria and sulfate-reducing bacteria. Growth in enrichment cultures was obtained only from water samples collected from a specific sampling depth in the borehole (3500 m). The hole was cased down to a depth of 5278 m and open to the formation below that level. All the water below 2000 m in depth standing in the borehole at the time of sampling must have entered at the 5278-m level or below, during a prior pumping operation. A strong salinity stratification certifies that no major amount of vertical mixing had taken place. The depth from which bacteria could be enriched was that of a pronounced local minimum of salinity. Pure cultures of thermophilic, anaerobic, fermenting bacteria were obtained with the following substrates: glucose, starch, xylan, ethanol, and lactate. The morphology and physiology of the glucose- and starch-degrading strains indicate a relationship to Thermoanaerobacter and Thermoanaerobium species. All but one of the newly isolated strains differ however from those by lacking acetate as a fermentation product. The glucose-degrading strain Gluc1...Continue Reading

References

Jul 1, 1992·Proceedings of the National Academy of Sciences of the United States of America·T Gold

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Citations

May 2, 2002·Biochimica Et Biophysica Acta·D H Bartlett
Mar 25, 2000·FEMS Microbiology Letters·K Pedersen
Apr 17, 2009·Astrobiology·Naoto Yoshida, Nori Fujiura
May 8, 2010·Astrobiology·Eriita G Jones, Charles H Lineweaver
Dec 14, 2011·Astrobiology·Eriita G JonesJonathan D Clarke
Apr 4, 2012·Astrobiology·Charles S CockellDavid S Powars
Dec 17, 2015·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·John Parnell, Sean McMahon
Nov 18, 2015·Astrobiology·Frances WestallCharles S Cockell
Feb 11, 2014·Carbohydrate Polymers·S Agüloğlu FincanF Matpan Bekler
Jul 27, 2007·Critical Reviews in Microbiology·Elena V PikutaJane Tang
Mar 27, 2018·Yeast·Pietro BuzziniAndrey Yurkov
May 22, 2009·Nature·Lynn J Rothschild
Aug 30, 2001·Applied and Environmental Microbiology·V T MarteinssonJ K Kristjánsson

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