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Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle

It is well known that the biological control of oceanic silica cycling is dominated by diatoms, with sponges and radiolarians playing additional roles. Recent studies have revealed that some smaller marine organisms (e.g. the picocyanobacterium Synechococcus) also take up silicic acid (dissolved sil...

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Autores principales: Churakova, Yelena, Aguilera, Anabella, Charalampous, Evangelia, Conley, Daniel J., Lundin, Daniel, Pinhassi, Jarone, Farnelid, Hanna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10316375/
https://www.ncbi.nlm.nih.gov/pubmed/36992638
http://dx.doi.org/10.1111/1758-2229.13144
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author Churakova, Yelena
Aguilera, Anabella
Charalampous, Evangelia
Conley, Daniel J.
Lundin, Daniel
Pinhassi, Jarone
Farnelid, Hanna
author_facet Churakova, Yelena
Aguilera, Anabella
Charalampous, Evangelia
Conley, Daniel J.
Lundin, Daniel
Pinhassi, Jarone
Farnelid, Hanna
author_sort Churakova, Yelena
collection PubMed
description It is well known that the biological control of oceanic silica cycling is dominated by diatoms, with sponges and radiolarians playing additional roles. Recent studies have revealed that some smaller marine organisms (e.g. the picocyanobacterium Synechococcus) also take up silicic acid (dissolved silica, dSi) and accumulate silica, despite not exhibiting silicon dependent cellular structures. Here, we show biogenic silica (bSi) accumulation in five strains of picoeukaryotes (<2–3 μm), including three novel isolates from the Baltic Sea, and two marine species (Ostreococcus tauri and Micromonas commoda), in cultures grown with added dSi (100 μM). Average bSi accumulation in these novel biosilicifiers was between 30 and 92 amol Si cell(−1). Growth rate and cell size of the picoeukaryotes were not affected by dSi addition. Still, the purpose of bSi accumulation in these smaller eukaryotic organisms lacking silicon dependent structures remains unclear. In line with the increasing recognition of picoeukaryotes in biogeochemical cycling, our findings suggest that they can also play a significant role in silica cycling.
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spelling pubmed-103163752023-07-04 Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle Churakova, Yelena Aguilera, Anabella Charalampous, Evangelia Conley, Daniel J. Lundin, Daniel Pinhassi, Jarone Farnelid, Hanna Environ Microbiol Rep Brief Reports It is well known that the biological control of oceanic silica cycling is dominated by diatoms, with sponges and radiolarians playing additional roles. Recent studies have revealed that some smaller marine organisms (e.g. the picocyanobacterium Synechococcus) also take up silicic acid (dissolved silica, dSi) and accumulate silica, despite not exhibiting silicon dependent cellular structures. Here, we show biogenic silica (bSi) accumulation in five strains of picoeukaryotes (<2–3 μm), including three novel isolates from the Baltic Sea, and two marine species (Ostreococcus tauri and Micromonas commoda), in cultures grown with added dSi (100 μM). Average bSi accumulation in these novel biosilicifiers was between 30 and 92 amol Si cell(−1). Growth rate and cell size of the picoeukaryotes were not affected by dSi addition. Still, the purpose of bSi accumulation in these smaller eukaryotic organisms lacking silicon dependent structures remains unclear. In line with the increasing recognition of picoeukaryotes in biogeochemical cycling, our findings suggest that they can also play a significant role in silica cycling. John Wiley & Sons, Inc. 2023-03-29 /pmc/articles/PMC10316375/ /pubmed/36992638 http://dx.doi.org/10.1111/1758-2229.13144 Text en © 2023 The Authors. Environmental Microbiology Reports published by Applied Microbiology International and John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Brief Reports
Churakova, Yelena
Aguilera, Anabella
Charalampous, Evangelia
Conley, Daniel J.
Lundin, Daniel
Pinhassi, Jarone
Farnelid, Hanna
Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title_full Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title_fullStr Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title_full_unstemmed Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title_short Biogenic silica accumulation in picoeukaryotes: Novel players in the marine silica cycle
title_sort biogenic silica accumulation in picoeukaryotes: novel players in the marine silica cycle
topic Brief Reports
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10316375/
https://www.ncbi.nlm.nih.gov/pubmed/36992638
http://dx.doi.org/10.1111/1758-2229.13144
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