Changes at the ecto-mesodermal interface during development of the duck preen gland |
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Authors: | Dr. J. Bride L. Gomot |
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Affiliation: | (1) Faculté des Sciences et des Techniques, Laboratoire de Zoologie et Embryologie, ERA CNRS n 229, Besançon, France;(2) Faculté des Sciences et des Techniques, Laboratoire de Zoologie et Embryologie, E.R.A. CNRS n 229, Place Maréchal Leclerc, F-25042 Besançon Cedex, France |
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Abstract: | Summary An ultrastructural investigation of the organogenesis of the duck preen gland showed variations at the ecto-mesodermal interface in the course of development. During the period of invagination, ectoderm and mesoderm were separated by a continuous basal lamina. Morphogenesis of the tubules is characterized by a preferential deposition of non-oriented collagen fibres localized at the branching sites. Direct contacts between ectodermal extensions and mesodermal cells, through gaps in the basal lamina, appeared at the end-buds after the morphogenetic pattern was established and before the onset of the glandular secretory activity. The correlation between the modification of the ecto-mesodermal interface and the differentiation of uropygial ectoderm is discussed. |
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Keywords: | Ecto-mesodermal interface Organogenesis Preen gland Duck, Anas platyrhynchos |
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