Archaeal uptake of enantiomeric amino acids in the meso- and bathypelagic waters of the North Atlantic
- Author(s)
- Eva Teira, Hendrik Van Aken, Cornelis Veth, Gerhard J. Herndl
- Abstract
We determined the contribution of the three major prokaryotic groups (Bacteria, Crenarchaeota, and Euryarchaeota) on the uptake of D- and L-aspartic acid (Asp) in the major water masses of the North Atlantic (from 100-to 4,000-m depth) with the use of microautoradiography combined with catalyzed reporter deposition fluorescence in situ hybridization (MICRO-CARD-FISH). The percentage of prokaryotic cells that assimilated D- and L-Asp ranged from <5% to 25%. In the meso- and bathypelagic waters of the North Atlantic, Archaea are more abundant (42% ± 2% of 4′,6′-diamino-2-phenylindole [DAPI]-stained cells) than Bacteria (30% ± 1% of DAPI-stained cells), and more archaeal than bacterial cells are actively incorporating D-Asp (62% ± 2% vs. 38% ± 2% of total D-Asp active cells). In contrast, Bacteria and Archaea almost equally contribute to L-Asp use in the deep waters of the North Atlantic (47% ± 2% vs. 53% ± 2% of total L-Asp active cells). The increase in the D-Asp:L-Asp uptake ratio in the prokaryotic community with depth appears to be driven by the efficient uptake of D-Asp by, especially, the Crenarchaeota in the deep waters. Because Archaea, and particularly Crenarchaeota, commonly dominate the prokaryotic communities in the ocean's interior, we suggest that they represent a previously unrecognized sink of D-amino acids in the deep ocean.
- Organisation(s)
- External organisation(s)
- Royal Netherlands Institute for Sea Research
- Journal
- Limnology and Oceanography
- Volume
- 51
- Pages
- 60-69
- No. of pages
- 10
- ISSN
- 0024-3590
- DOI
- https://doi.org/10.4319/lo.2006.51.1.0060
- Publication date
- 01-2006
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106021 Marine biology
- ASJC Scopus subject areas
- Oceanography, Aquatic Science
- Sustainable Development Goals
- SDG 14 - Life Below Water
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/58518dff-fbed-427b-b73a-54fde136f08a