Articles | Volume 15, issue 21
https://doi.org/10.5194/bg-15-6591-2018
https://doi.org/10.5194/bg-15-6591-2018
Research article
 | 
07 Nov 2018
Research article |  | 07 Nov 2018

Marine and freshwater micropearls: biomineralization producing strontium-rich amorphous calcium carbonate inclusions is widespread in the genus Tetraselmis (Chlorophyta)

Agathe Martignier, Montserrat Filella, Kilian Pollok, Michael Melkonian, Michael Bensimon, François Barja, Falko Langenhorst, Jean-Michel Jaquet, and Daniel Ariztegui

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ED: Reconsider after major revisions (02 Aug 2018) by Lennart de Nooijer
AR by Agathe Martignier on behalf of the Authors (05 Sep 2018)  Author's response   Manuscript 
ED: Publish subject to technical corrections (16 Oct 2018) by Lennart de Nooijer
AR by Agathe Martignier on behalf of the Authors (18 Oct 2018)  Author's response   Manuscript 
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Short summary
The unicellular microalga Tetraselmis cordiformis (Chlorophyta) was recently discovered to form intracellular mineral inclusions, called micropearls, which had been previously overlooked. The present study shows that 10 Tetraselmis species out of the 12 tested share this biomineralization capacity, producing amorphous calcium carbonate inclusions often enriched in Sr. This novel biomineralization process can take place in marine, brackish or freshwater and is therefore a widespread phenomenon.
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