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Biogeosciences An interactive open-access journal of the European Geosciences Union
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BG | Articles | Volume 15, issue 21
Biogeosciences, 15, 6591–6605, 2018
https://doi.org/10.5194/bg-15-6591-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 15, 6591–6605, 2018
https://doi.org/10.5194/bg-15-6591-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

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 et al.

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Cited articles

Addadi, L., Raz, S., and Weiner, S.: Taking advantage of disorder: Amorphous calcium carbonate and its roles in biomineralization, Adv. Mater., 15, 959–970, https://doi.org/10.1002/adma.200300381, 2003. 
Aizenberg, J., Lambert, G., Weiner, S., and Addadi, L.: Factors involved in the formation of amorphous and crystalline calcium carbonate: a study of an ascidian skeleton, J. Am. Chem. Soc., 124, 32–39, https://doi.org/10.1021/ja016990l, 2002. 
Albéric, M., Bertinetti, L., Zou, Z., Fratzl, P., Habraken, W., and Politi, Y.: The crystallization of amorphous calcium carbonate is kinetically governed by ion impurities and water, Adv. Sci., 5, 1701000, https://doi.org/10.1002/advs.201701000, 2018. 
Asinari di San Marzano, C.-M., Legros, A., Piron, C., Sironval, C., Nyns, E.-J., and Naveau, H. P.: Methane production by anaerobic digestion of algae, in: Energy from biomass: Proceedings of the EC Contractors' Meeting held in Copenhagen, 23–24 June 1981, edited by: Chartier, P. and Palz, W., Springer Netherlands, Dordrecht, 113–120, 1981. 
Azma, M., Mohamed, M. S., Mohamad, R., Rahim, R. A., and Ariff, A. B.: Improvement of medium composition for heterotrophic cultivation of green microalgae, Tetraselmis suecica, using response surface methodology, Biochem. Eng. J., 53, 187–195, https://doi.org/10.1016/j.bej.2010.10.010, 2011. 
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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.
The unicellular microalga Tetraselmis cordiformis (Chlorophyta) was recently discovered to form...
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