Adaptation of psychrophilic and psychrotrophic sulfate-reducing bacteria to permanently cold marine environments.

Applied and Environmental Microbiology
M F Isaksen, B B Jorgensen

Abstract

The potential for sulfate reduction at low temperatures was examined in two different cold marine sediments, Mariager Fjord (Denmark), which is permanently cold (3 to 6(deg)C) but surrounded by seasonally warmer environments, and the Weddell Sea (Antarctica), which is permanently below 0(deg)C. The rates of sulfate reduction were measured by the (sup35)SO(inf4)(sup2-) tracer technique at different experimental temperatures in sediment slurries. In sediment slurries from Mariager Fjord, sulfate reduction showed a mesophilic temperature response which was comparable to that of other temperate environments. In sediment slurries from Antarctica, the metabolic activity of psychrotrophic bacteria was observed with a respiration optimum at 18 to 19(deg)C during short-term incubations. However, over a 1-week incubation, the highest respiration rate was observed at 12.5(deg)C. Growth of the bacterial population at the optimal growth temperature could be an explanation for the low temperature optimum of the measured sulfate reduction. The potential for sulfate reduction was highest at temperatures well above the in situ temperature in all experiments. The results from sediment incubations were compared with those obtained from pure cultu...Continue Reading

References

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Citations

Jan 18, 2005·International Journal of Systematic and Evolutionary Microbiology·Hana YiJongsik Chun
Apr 20, 2016·Frontiers in Microbiology·Alberto RobadorJan P Amend
Aug 31, 2000·Applied and Environmental Microbiology·L Elsgaard
Sep 28, 2006·Biotechnology and Bioengineering·Erkan SahinkayaJaakko A Puhakka
Apr 27, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Päivi KinnunenVille Miettinen
Jan 24, 2020·Environmental Microbiology·Bo Barker JørgensenIan P G Marshall
Dec 4, 2003·Environmental Microbiology·Martin Könneke, Friedrich Widdel
Apr 9, 2004·Proceedings of the National Academy of Sciences of the United States of America·P Buford Price, Todd Sowers
Mar 19, 2005·International Journal of Systematic and Evolutionary Microbiology·Hana YiJongsik Chun
Jun 2, 2006·International Journal of Systematic and Evolutionary Microbiology·Hana Yi, Jongsik Chun
May 7, 2003·Applied and Environmental Microbiology·J P BowmanP D Nichols
May 23, 2006·Extremophiles : Life Under Extreme Conditions·Shengkang LiFengping Wang
Sep 29, 2011·Environmental Monitoring and Assessment·Nurgul BalcıNevin Gul Karaguler
Sep 3, 1999·Applied and Environmental Microbiology·C KnoblauchJ Harder

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