Presence and activity of anaerobic ammonium-oxidizing bacteria at deep-sea hydrothermal vents

Nathalie Byrne 1, * Marc Strous 2 Valentin Crépeau 1 Boran Kartal 2 Jean-Louis Birrien 1 Markus Schmid 2 Françoise Lesongeur 1 Stefan Schouten 3 Andrea Jaeschke 3 Mike Jetten 2 Daniel Prieur 1 Anne Godfroy 1
* Auteur correspondant
1 LM2E - Laboratoire de microbiologie des environnements extrêmophiles
2 Department of Microbiology
3 Department of Marine Organic Biogeochemistry
Abstract : Recent studies indicate that ammonia is an important electron donor for the oxidation of fixed nitrogen, both in the marine water column and sediments. This process, known as anammox, has so far only been observed in a large range of temperature habitats. The present study investigated the role of anammox in hydrothermal settings. During three oceanographic expeditions to the Mid-Atlantic Ridge, hydrothermal samples were collected from five vent sites, at depths ranging from 750 to 3650 m from cold to hot habitats. Evidence for the occurrence of anammox in these particular habitats was demonstrated by concurrent surveys, including the amplification of 16S rRNA gene sequences related to known anammox bacteria, ladderanes lipids analysis and measurement of a (14)N(15)N dinitrogen production in isotope-pairing experiments at 60 and 85 degrees C. Together these results indicate that new deep-branching anammox bacteria may be active in these hot habitats.
Keywords : anammox micro-organisms activity 16S rRNA ladderanes hydrothermal vent
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Article dans une revue
ISME Journal, Nature Publishing Group, 2009, 3 (1), pp.117-123. 〈10.1038/ismej.2008.72〉
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http://hal.univ-brest.fr/hal-00561412
Contributeur : Violaine Garguilo <>
Soumis le : mardi 1 février 2011 - 11:14:31
Dernière modification le : jeudi 11 janvier 2018 - 06:16:39

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Nathalie Byrne, Marc Strous, Valentin Crépeau, Boran Kartal, Jean-Louis Birrien, et al.. Presence and activity of anaerobic ammonium-oxidizing bacteria at deep-sea hydrothermal vents. ISME Journal, Nature Publishing Group, 2009, 3 (1), pp.117-123. 〈10.1038/ismej.2008.72〉. 〈hal-00561412〉

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