Membrane Lipid Composition of the Moderately Thermophilic Ammonia-Oxidizing Archaeon “Candidatus Nitrosotenuis uzonensis” at Different Growth Temperatures

• Nicole J. Bale ^[2] ; Marton Palatinszky ^[1] ; W. Irene C. Rijpstra ^[2] ; Craig W. Herbold ^[1] ; Michael Wagner ^[1] ; Jaap S. Sinninghe Damsté ^[3]
  1. [1] University of Vienna

     University of Vienna

     Innere Stadt, Austria

     
  2. [2] a NIOZ Royal Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, and Utrecht University, Texel, The Netherlands
  3. [3] a NIOZ Royal Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, and Utrecht University, Texel, The Netherlands; d Faculty of Geosciences, Department of Earth Sciences, Utrecht University, Utrecht, The Netherlands

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• Localización: Applied and Environmental Microbiology, ISSN 0099-2240, Vol. 85, Nº 20, 2019
• Idioma: inglés
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  • For Thaumarchaeota, the ratio of their glycerol dialkyl glycerol tetraether (GDGT) lipids depends on growth temperature, a premise that forms the basis of the widely applied TEX86 paleotemperature proxy. A thorough understanding of which GDGTs are produced by which Thaumarchaeota and what the effect of temperature is on their GDGT composition is essential for constraining the TEX86 proxy. “Ca. Nitrosotenuis uzonensis” is a moderately thermophilic thaumarchaeote enriched from a thermal spring, setting it apart in its environmental niche from the other marine mesophilic members of its order. Indeed, we found that the GDGT composition of “Ca. Nitrosotenuis uzonensis” cultures was distinct from those of other members of its order and was more similar to those of other thermophilic, terrestrial Thaumarchaeota. This suggests that while phylogeny has a strong influence on GDGT distribution, the environmental niche that a thaumarchaeote inhabits also shapes its GDGT composition.