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A role for diatom-like silicon transporters in calcifying coccolithophores

A role for diatom-like silicon transporters in calcifying coccolithophores
A role for diatom-like silicon transporters in calcifying coccolithophores
Biomineralization by marine phytoplankton, such as the silicifying diatoms and calcifying coccolithophores, plays an important role in carbon and nutrient cycling in the oceans. Silicification and calcification are distinct cellular processes with no known common mechanisms. It is thought that coccolithophores are able to outcompete diatoms in Si-depleted waters, which can contribute to the formation of coccolithophore blooms. Here we show that an expanded family of diatom-like silicon transporters (SITs) are present in both silicifying and calcifying haptophyte phytoplankton, including some globally important coccolithophores. Si is required for calcification in these coccolithophores, indicating that Si uptake contributes to the very different forms of biomineralization in diatoms and coccolithophores. Significantly, SITs and the requirement for Si are absent from highly abundant bloom-forming coccolithophores, such as Emiliania huxleyi. These very different requirements for Si in coccolithophores are likely to have major influence on their competitive interactions with diatoms and other siliceous phytoplankton.
10543
Durak, Grażyna M.
c3c8915c-5a24-4a1c-ba99-9150ea0180a5
Taylor, Alison R.
a20791ff-9a08-4fb9-b484-2e39368f7789
Walker, Charlotte E.
70584245-8442-4f4d-9bd4-822e12b79f7f
Probert, Ian
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de Vargas, Colomban
aefc64a9-e7df-4549-97f3-4f21791ddc5f
Audic, Stephane
bda45a84-0634-478f-9586-a24d6edd35d2
Schroeder, Declan
c3e25db4-5af2-4792-8eda-bd3c94ad03ba
Brownlee, Colin
2af37c1c-b2bf-4832-8370-d9c35e7b3385
Wheeler, Glen L.
80ee477b-ceb3-4051-923c-399098bb746a
Durak, Grażyna M.
c3c8915c-5a24-4a1c-ba99-9150ea0180a5
Taylor, Alison R.
a20791ff-9a08-4fb9-b484-2e39368f7789
Walker, Charlotte E.
70584245-8442-4f4d-9bd4-822e12b79f7f
Probert, Ian
c75f0281-8f0c-4989-95bc-96ab266dbefc
de Vargas, Colomban
aefc64a9-e7df-4549-97f3-4f21791ddc5f
Audic, Stephane
bda45a84-0634-478f-9586-a24d6edd35d2
Schroeder, Declan
c3e25db4-5af2-4792-8eda-bd3c94ad03ba
Brownlee, Colin
2af37c1c-b2bf-4832-8370-d9c35e7b3385
Wheeler, Glen L.
80ee477b-ceb3-4051-923c-399098bb746a

Durak, Grażyna M., Taylor, Alison R., Walker, Charlotte E., Probert, Ian, de Vargas, Colomban, Audic, Stephane, Schroeder, Declan, Brownlee, Colin and Wheeler, Glen L. (2016) A role for diatom-like silicon transporters in calcifying coccolithophores. Nature Communications, 7, 10543. (doi:10.1038/ncomms10543).

Record type: Article

Abstract

Biomineralization by marine phytoplankton, such as the silicifying diatoms and calcifying coccolithophores, plays an important role in carbon and nutrient cycling in the oceans. Silicification and calcification are distinct cellular processes with no known common mechanisms. It is thought that coccolithophores are able to outcompete diatoms in Si-depleted waters, which can contribute to the formation of coccolithophore blooms. Here we show that an expanded family of diatom-like silicon transporters (SITs) are present in both silicifying and calcifying haptophyte phytoplankton, including some globally important coccolithophores. Si is required for calcification in these coccolithophores, indicating that Si uptake contributes to the very different forms of biomineralization in diatoms and coccolithophores. Significantly, SITs and the requirement for Si are absent from highly abundant bloom-forming coccolithophores, such as Emiliania huxleyi. These very different requirements for Si in coccolithophores are likely to have major influence on their competitive interactions with diatoms and other siliceous phytoplankton.

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Accepted/In Press date: 23 December 2015
e-pub ahead of print date: 4 February 2016
Published date: 4 February 2016
Organisations: Ocean and Earth Science

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Local EPrints ID: 390956
URI: http://eprints.soton.ac.uk/id/eprint/390956
PURE UUID: effd0c06-248f-4e9d-8f1e-15bc2177de35

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Date deposited: 07 Apr 2016 09:48
Last modified: 07 Jan 2022 21:47

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Contributors

Author: Grażyna M. Durak
Author: Alison R. Taylor
Author: Charlotte E. Walker
Author: Ian Probert
Author: Colomban de Vargas
Author: Stephane Audic
Author: Declan Schroeder
Author: Colin Brownlee
Author: Glen L. Wheeler

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