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Revisiting the Organic Template Model through the Microstructural Study of Shell Development in Pinctada margaritifera, the Polynesian Pearl Oyster

TitreRevisiting the Organic Template Model through the Microstructural Study of Shell Development in Pinctada margaritifera, the Polynesian Pearl Oyster
Type de publicationJournal Article
Year of Publication2018
AuteursCuif, J-P, Dauphin, Y, Luquet, G, Medjoubi, K, Somogyi, A, Perez-Huerta, A
JournalMinerals
Volume8
Ticket9
Pagination370
Date Published09/2018
Mots-clésbiocrystallization model, biomineralization, Mollusca, shell development
Résumé

A top-down approach to the mineralized structures and developmental steps that can be
separated in the shells of Pinctada margaritifera was carried out. Detailed characterizations show
that each of the two major layers usually taken into account (the outer prismatic layer and the
inner nacreous layer) is actually the result of a complex process during which the microstructural
patterns were progressively established. From its early growing stages in the deeper part of the
periostracal grove up to the formation of the most inner nacreous layers, this species provides a
demonstrative case study illustrating the leading role of specifically secreted organic structures as
determinants of the crystallographic properties of the shell-building units. Gathering data established
at various observational scales ranging from morphology to the nanometer level, this study allows
for a reexamination of the recent and current biomineralization models.

DOI10.3390/min8090370