Evidence for participation of the epidermis in the deposition of superficial layer of scales in zebrafish (Danio rerio): A SEM and TEM study

Journal of Morphology
J Y SireF Allizard

Abstract

Comparative studies on scale structure and development in bony fish have led to the hypothesis that elasmoid scales in teleosts could be dental in origin. The present work was undertaken to determine whether the scales in zebrafish (Danio rerio), a species widely used in genetics and developmental biology, would be an appropriate focus for further studies devoted to the immunodetection of dental components or to the detection of the expression of genes coding for various dental proteins in fish scales. The superficial region of mature and experimentally regenerated scales and its relationships to the epidermal cover were studied in adult zebrafish using scanning (SEM) and transmission (TEM) electron microscopy. The elasmoid scales are relatively large, thin, and are located in the upper region of the dermis, close to the epidermis. In adults, the surface of the posterior region appears smooth at the SEM level and is entirely covered by the epidermis. During regeneration, the relationship of the epidermal cover to the scale surface is established within 4 days. This interface is easier to study in regenerating than in mature scales because the former are poorly mineralized. TEM revealed that: (1) the epidermis is in direct conta...Continue Reading

References

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Citations

Aug 25, 2006·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Angèle Tingaud-SequeiraPatrick J Babin
Mar 25, 1999·Developmental Dynamics : an Official Publication of the American Association of Anatomists·M J MonnotM A Akimenko
Jun 14, 2003·Biological Reviews of the Cambridge Philosophical Society·Jean-Yves Sire, Ann Huysseune
Feb 2, 2000·The Journal of Experimental Zoology·J Y SireO Babiar
Feb 12, 2002·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Zhiyuan GongTie Yan
Oct 18, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Sandra MurciaD Arola

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