Unexpected silicon localization in calcium carbonate exoskeleton of cultured and fossil coccolithophores.

Autor: Bordiga M; National Institute of Oceanography and Applied Geophysics-OGS, Via Auguste Piccard 54, 34151, Trieste, Italy.; Department of Earth and Environmental Sciences, University of Pavia, Via Ferrata 1, 27100, Pavia, Italy., Lupi C; Department of Earth and Environmental Sciences, University of Pavia, Via Ferrata 1, 27100, Pavia, Italy. claudia.lupi@unipv.it., Langer G; ICTA, Autonomous University of Barcelona (UAB), 08193, Bellaterra, Spain., Gianoncelli A; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Birarda G; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Pollastri S; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Bonanni V; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Bedolla DE; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy.; AREA Science Park, Padriciano 99, 34149, Trieste, Italy., Vaccari L; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Gariani G; Elettra-Sincrotrone Trieste, Strada Statale 14, km 163.5 in Area Science Park, 34049, Trieste-Basovizza, Italy., Cerino F; National Institute of Oceanography and Applied Geophysics-OGS, Via Auguste Piccard 54, 34151, Trieste, Italy., Cabrini M; National Institute of Oceanography and Applied Geophysics-OGS, Via Auguste Piccard 54, 34151, Trieste, Italy., Beran A; National Institute of Oceanography and Applied Geophysics-OGS, Via Auguste Piccard 54, 34151, Trieste, Italy., Zuccotti M; Department of Biology and Biotechnologies 'Lazzaro Spallanzani', University of Pavia, Via Ferrata 9, 27100, Pavia, Italy., Fiorentino G; Department of Biology and Biotechnologies 'Lazzaro Spallanzani', University of Pavia, Via Ferrata 9, 27100, Pavia, Italy., Zanoni M; Department of Biology and Biotechnologies 'Lazzaro Spallanzani', University of Pavia, Via Ferrata 9, 27100, Pavia, Italy., Garagna S; Department of Biology and Biotechnologies 'Lazzaro Spallanzani', University of Pavia, Via Ferrata 9, 27100, Pavia, Italy., Cobianchi M; Department of Earth and Environmental Sciences, University of Pavia, Via Ferrata 1, 27100, Pavia, Italy., Di Giulio A; Department of Earth and Environmental Sciences, University of Pavia, Via Ferrata 1, 27100, Pavia, Italy.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 May 07; Vol. 13 (1), pp. 7417. Date of Electronic Publication: 2023 May 07.
DOI: 10.1038/s41598-023-34003-3
Abstrakt: Coccolithophores, marine calcifying phytoplankton, are important primary producers impacting the global carbon cycle at different timescales. Their biomineral structures, the calcite containing coccoliths, are among the most elaborate hard parts of any organism. Understanding the morphogenesis of coccoliths is not only relevant in the context of coccolithophore eco-physiology but will also inform biomineralization and crystal design research more generally. The recent discovery of a silicon (Si) requirement for crystal shaping in some coccolithophores has opened up a new avenue of biomineralization research. In order to develop a mechanistic understanding of the role of Si, the presence and localization of this chemical element in coccoliths needs to be known. Here, we document for the first time the uneven Si distribution in Helicosphaera carteri coccoliths through three synchrotron-based techniques employing X-ray Fluorescence and Infrared Spectromicroscopy. The enrichment of Si in specific areas of the coccoliths point to a targeted role of this element in the coccolith formation. Our findings mark a key step in biomineralization research because it opens the door for a detailed mechanistic understanding of the role Si plays in shaping coccolith crystals.
(© 2023. The Author(s).)
Databáze: MEDLINE
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