Biogenic silica accumulation in picoeukaryotes : Novel players in the marine silica cycle
(2023) In Environmental microbiology reports 15(4). p.282-290- Abstract
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... (More)
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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- author
- Churakova, Yelena ; Aguilera, Anabella ; Charalampous, Evangelia ; Conley, Daniel J. LU ; Lundin, Daniel ; Pinhassi, Jarone and Farnelid, Hanna
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Environmental microbiology reports
- volume
- 15
- issue
- 4
- pages
- 9 pages
- publisher
- Wiley-Blackwell
- external identifiers
-
- pmid:36992638
- scopus:85152072762
- ISSN
- 1758-2229
- DOI
- 10.1111/1758-2229.13144
- language
- English
- LU publication?
- yes
- id
- 97d51803-1354-4f52-8636-6f8d6ade158c
- date added to LUP
- 2023-07-20 13:13:17
- date last changed
- 2024-04-19 23:51:22
@article{97d51803-1354-4f52-8636-6f8d6ade158c,
abstract = {{<p>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<sup>−1</sup>. 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.</p>}},
author = {{Churakova, Yelena and Aguilera, Anabella and Charalampous, Evangelia and Conley, Daniel J. and Lundin, Daniel and Pinhassi, Jarone and Farnelid, Hanna}},
issn = {{1758-2229}},
language = {{eng}},
number = {{4}},
pages = {{282--290}},
publisher = {{Wiley-Blackwell}},
series = {{Environmental microbiology reports}},
title = {{Biogenic silica accumulation in picoeukaryotes : Novel players in the marine silica cycle}},
url = {{http://dx.doi.org/10.1111/1758-2229.13144}},
doi = {{10.1111/1758-2229.13144}},
volume = {{15}},
year = {{2023}},
}