Heterotrophic Foraminifera capable of inorganic nitrogen assimilation
| Autor: | Anders Meibom, Clare Bird, Charlotte LeKieffre, Thierry Jauffrais, Jennifer S. Fehrenbacher, Emmanuelle Geslin, Ann D. Russell, Olivier Maire, Helena L. Filipsson |
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| Přispěvatelé: | Faculty of Natural Sciences [Stirling], University of Stirling, Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Ifremer - Nouvelle-Calédonie, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Laboratory for Biological Geochemistry, École Polytechnique Fédérale de Lausanne (EPFL), Department of Geology [Lund], Lund University [Lund], Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Department of Earth and Planetary Sciences [Davis], University of California [Davis] (UC Davis), University of California-University of California, College of Earth, Ocean and Atmospheric Sciences [Corvallis] (CEOAS), Oregon State University (OSU), Edinburgh University, Swiss National Science Foundation (SNSF), KVA (Royal Swedish Academy of Sciences) grant for Internationalization and Scientific Renewal at the Sven Loven Centre (SLC) for Marine Sciences, National Science Foundation (NSF), NERC Natural Environment Research Council, UK Research & Innovation (UKRI) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Microbiology (medical)
010504 meteorology & atmospheric sciences lcsh:QR1-502 Heterotroph benthic foraminifera cushman 01 natural sciences Microbiology lcsh:Microbiology 03 medical and health sciences Ammonia chemistry.chemical_compound globigerina-bulloides planktonic-foraminifera Glutamate synthase nitrogen cycle Ammonium ammonium assimilation Nitrogen cycle Original Research 030304 developmental biology 0105 earth and related environmental sciences 0303 health sciences heterotrophy denitrification biology foraminifera marine Assimilation (biology) Globigerina bulloides biology.organism_classification ultrastructure glutamate-dehydrogenase heterotrophic protists chemistry Environmental chemistry [SDE]Environmental Sciences ammonia-tepida biology.protein Microbial loop |
| Zdroj: | Frontiers in Microbiology Frontiers in Microbiology, Frontiers Media, 2020, 11, pp.604979. ⟨10.3389/fmicb.2020.604979⟩ Frontiers in Microbiology, Vol 11 (2020) Frontiers In Microbiology (1664-302X) (Frontiers Media SA), 2020-12, Vol. 11, P. 604979 (13p.) |
| ISSN: | 1664-302X |
| DOI: | 10.3389/fmicb.2020.604979⟩ |
| Popis: | Nitrogen availability often limits biological productivity in marine systems, where inorganic nitrogen, such as ammonium is assimilated into the food web by bacteria and photoautotrophic eukaryotes. Recently, ammonium assimilation was observed in kleptoplast-containing protists of the phylum foraminifera, possibly via the glutamine synthetase/glutamate synthase (GS/GOGAT) assimilation pathway imported with the kleptoplasts. However, it is not known if the ubiquitous and diverse heterotrophic protists have an innate ability for ammonium assimilation. Using stable isotope incubations (15N-ammonium and 13C-bicarbonate) and combining transmission electron microscopy (TEM) with quantitative nanoscale secondary ion mass spectrometry (NanoSIMS) imaging, we investigated the uptake and assimilation of dissolved inorganic ammonium by two heterotrophic foraminifera; a non-kleptoplastic benthic species, Ammonia sp., and a planktonic species, Globigerina bulloides. These species are heterotrophic and not capable of photosynthesis. Accordingly, they did not assimilate 13C-bicarbonate. However, both species assimilated dissolved 15N-ammonium and incorporated it into organelles of direct importance for ontogenetic growth and development of the cell. These observations demonstrate that at least some heterotrophic protists have an innate cellular mechanism for inorganic ammonium assimilation, highlighting a newly discovered pathway for dissolved inorganic nitrogen (DIN) assimilation within the marine microbial loop. |
| Databáze: | OpenAIRE |
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