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| Larvor, H.; Cuif, J.p.; Devauchelle, Nicole; Dauphin, Y; Denis, A; Gautret, P; Marin, F. |
| Calcification abnormalities linked to a brown coloration of the internal layer of the valves have been observed on scallops - Pecten maximus - in different rearing sites of Brittany. Scanning electronic microscopic (SEM) observations demonstrate that the brown pigmentation is associated with various modifications of the foliated microstructure of the internal layer of the shell. Very brown shells have been compared to healthy white shells with different methods. According to the amino acid analyses, the production of the soluble organic matrices appears to be preserved in the diseased shells. A small but significant decrease in the aspartic acid content has been observed in the insoluble organic matrix of the brown shells. The Ca content is the same in the... |
| Tipo: Text |
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| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00048/15929/13355.pdf |
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| Fleury, C; Marin, F; Marie, B; Luquet, G; Thomas, J; Josse, C; Serpentini, A; Lebel, J. |
| In the present paper, juvenile and adult shells of the green ormer Haliotis tuberculata ('Oreille de Saint-Pierre') were perforated in a zone close to the shell edge and the shell repair process was followed at two levels: (1) by observing the histology of the calcifying mantle in the repair zone and (2) by analyzing with SEM the microstructure of the shell repair zone. Histological data clearly show the presence of calcium carbonate granules into the connective tissues, but not in the epithelial cells. This suggests that calcium carbonate granules are synthesized by sub-epithelial cells and actively transported through the epithelium to the repair zone, via a process which may be similar to that described by Mount et al. [Mount, A.S., Wheeler, A.P.,... |
| Tipo: Text |
Palavras-chave: Microstructure; Mantle epithelium; Biomineralization; Calcium carbonate; Shell repair; Gastropod. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/2008/publication-4377.pdf |
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