Summary
Injection of retinoic acid (3×62.5 μg or 3×125 μg) into the amniotic sac of chick embryos between 10 and 12 days of incubation resulted in the formation of club-shaped feathers within the feather tracts, and the development of feathers in the scale-forming areas of the feet. The latter finding is interpreted as caused by a disturbance of the tissue interactions which occur in the skin of the feet at this time.
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References
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The address for correspondence: Universitè Scientifique et Médicale de Grepoble, Laboratoire de Zoologie et Biologie animale, Boîte Postale no 53-Centre de Tri, F-38041 Grenoble Cedex, France
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Dhouailly, D., Hardy, M.H. Retinoic acid causes the development of feathers in the scale-forming integument of the chick embryo. Wilhelm Roux' Archiv 185, 195–200 (1978). https://doi.org/10.1007/BF00848678
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DOI: https://doi.org/10.1007/BF00848678