title: [The tail of the tadpole of Alytes obstetricans in organ culture with or without the addition of thyroxine. Ultrastructural controls].
abstract: The tail of the Alytes obstetricans tadpole, isolated at different stages (end of proclimax and climax), was studied in organ culture. The addition of thyroxine at a concentration of 5.10(-7) induces an involution slower than in vivo. Besides, this regression is comparatively slower in similar conditions, than in Xenopus laevis. This delay could be explained by the important volume and the very developed musculature of this anuran tail. Ultrastructural controls reveal the form of the muscles, the neural tube and the phagocytic cells in the tail metamorphising in vitro.
mesh_terms: D000367:Age Factors; D000818:Animals; D001001:Anura / Q000254:growth & development*; D001329:Autolysis / Q000473:pathology; D007814:Larva; D008675:Metamorphosis, Biological / Q000187:drug effects; D008854:Microscopy, Electron; D009924:Organ Culture Techniques; D013623:Tail / Q000254:growth & development* / Q000648:ultrastructure; D013974:Thyroxine / Q000494:pharmacology*
chemical_list: D013974:Thyroxine
vernacular_title: Etude de la queue du têtard d'Alytes obstetricans en culture organotypique avec ou sans addition de thyroxine. Contrôles ultrastructuraux