Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments
Five psychrophilic sulphate-reducing bacteria (strains ASv26, LSv21, PSv29, LSv54 and LSv514) isolated from Arctic sediments were examined for their adaptation to permanently low temperatures, All strains grew at -1.8 degrees C, the freezing point of sea water, but their optimum temperature for grow...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/f2ddd80c-d829-4482-b96d-993ee2bd4cc7 2023-05-15T14:23:57+02:00 Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments Knoblauch, C. Jørgensen, BB 1999-10-01 https://pure.au.dk/portal/da/publications/effect-of-temperature-on-sulphate-reduction-growth-rate-and-growth-yield-in-five-psychrophilic-sulphatereducing-bacteria-from-arctic-sediments(f2ddd80c-d829-4482-b96d-993ee2bd4cc7).html eng eng info:eu-repo/semantics/restrictedAccess Knoblauch , C & Jørgensen , BB 1999 , ' Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments ' , Environmental Microbiology , vol. 1 , no. 5 , pp. 457-467 . article 1999 ftuniaarhuspubl 2022-02-09T23:49:43Z Five psychrophilic sulphate-reducing bacteria (strains ASv26, LSv21, PSv29, LSv54 and LSv514) isolated from Arctic sediments were examined for their adaptation to permanently low temperatures, All strains grew at -1.8 degrees C, the freezing point of sea water, but their optimum temperature for growth (T(opt)) were 7 degrees C (PSv29), 10 degrees C (ASv26, LSv54) and 18 degrees C (LSv21, LSv514), Although T(opt) was considerably above the in situ temperatures of their habitats (-1.7 degrees C and 2.6 degrees C), relative growth rates were still high at 0 degrees C, accounting for 25-41% of those at T(opt). Short-term incubations of exponentially growing cultures showed that the highest sulphate reduction rates occurred 2-9 degrees C above T(opt). In contrast to growth and sulphate reduction rates, growth yields of strains ASv26, LSv54 and PSv29 were almost constant between -1.8 degrees C and T(opt). For strains LSv21 and LSv514, however, growth yields were highest at the lowest temperatures, around 0 degrees C. The results indicate that psychrophilic sulphate-reducing bacteria are specially adapted to permanently low temperatures by high relative growth rates and high growth yields at in site conditions. Article in Journal/Newspaper Arctic Arctic Aarhus University: Research Arctic |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Five psychrophilic sulphate-reducing bacteria (strains ASv26, LSv21, PSv29, LSv54 and LSv514) isolated from Arctic sediments were examined for their adaptation to permanently low temperatures, All strains grew at -1.8 degrees C, the freezing point of sea water, but their optimum temperature for growth (T(opt)) were 7 degrees C (PSv29), 10 degrees C (ASv26, LSv54) and 18 degrees C (LSv21, LSv514), Although T(opt) was considerably above the in situ temperatures of their habitats (-1.7 degrees C and 2.6 degrees C), relative growth rates were still high at 0 degrees C, accounting for 25-41% of those at T(opt). Short-term incubations of exponentially growing cultures showed that the highest sulphate reduction rates occurred 2-9 degrees C above T(opt). In contrast to growth and sulphate reduction rates, growth yields of strains ASv26, LSv54 and PSv29 were almost constant between -1.8 degrees C and T(opt). For strains LSv21 and LSv514, however, growth yields were highest at the lowest temperatures, around 0 degrees C. The results indicate that psychrophilic sulphate-reducing bacteria are specially adapted to permanently low temperatures by high relative growth rates and high growth yields at in site conditions. |
format |
Article in Journal/Newspaper |
author |
Knoblauch, C. Jørgensen, BB |
spellingShingle |
Knoblauch, C. Jørgensen, BB Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
author_facet |
Knoblauch, C. Jørgensen, BB |
author_sort |
Knoblauch, C. |
title |
Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
title_short |
Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
title_full |
Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
title_fullStr |
Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
title_full_unstemmed |
Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments |
title_sort |
effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from arctic sediments |
publishDate |
1999 |
url |
https://pure.au.dk/portal/da/publications/effect-of-temperature-on-sulphate-reduction-growth-rate-and-growth-yield-in-five-psychrophilic-sulphatereducing-bacteria-from-arctic-sediments(f2ddd80c-d829-4482-b96d-993ee2bd4cc7).html |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
Knoblauch , C & Jørgensen , BB 1999 , ' Effect of temperature on sulphate reduction, growth rate and growth yield in five psychrophilic sulphate-reducing bacteria from Arctic sediments ' , Environmental Microbiology , vol. 1 , no. 5 , pp. 457-467 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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1766296405315420160 |