Evidence of a Biological Control over Origin, Growth and End of the Calcite Prisms in the Shells of Pinctada margaritifera (Pelecypod, Pterioidea) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Minerals Année : 2014

Evidence of a Biological Control over Origin, Growth and End of the Calcite Prisms in the Shells of Pinctada margaritifera (Pelecypod, Pterioidea)

Résumé

Consistently classified among the references for calcite simple prisms, the microstructural units that form the outer layer of the Pinctada margaritifera have been investigated through a series of morphological, crystallographical and biochemical characterizations. It is often said that the polygonal transverse shape of the prisms result from the competition for space between adjacent crystals. In contrast to this classical scheme the Pinctada prisms appear to be composed of four successive developmental stages from the concentrically growing disks on the internal side of the periostracum to the morphological, structural and compositional changes in both envelopes and mineral components at the end of the prisms. These latest structural and compositional changes predate nacre deposition, so that the end of prism growth is not caused by occurrence of nacre, but by metabolic changes in the secretory epithelium. This sequence makes obvious the permanent biological control exerted by the outer cell layer of the mantle in both organic envelopes and mineralizing organic phases.
Fichier principal
Vignette du fichier
Cuif-minerals-04-00815.pdf (12.64 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01121113 , version 1 (26-09-2015)

Identifiants

Citer

J.P. Cuif, Manfred Burghammer, Virginie Chamard, Y. Dauphin, Pierre Godard, et al.. Evidence of a Biological Control over Origin, Growth and End of the Calcite Prisms in the Shells of Pinctada margaritifera (Pelecypod, Pterioidea). Minerals, 2014, 4, pp.815. ⟨10.3390/min4040815⟩. ⟨hal-01121113⟩
173 Consultations
79 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More