Summary
Two grafts of Hensen's node were implanted on the same host blastoderm the first graft in the area pellucida, the second in the area opaca. At various intervals, the grafts were detached from the ectoblast and host blastoderms were allowed to grow in order to assess the type of inductive response produced by the ectoblast. These experiments show that 2–6 h were necessary to elicit neural induction in the ectoblast of the area pellucida, while 7–9 h were required to obtain neural induction in the area opaca.
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Gallera, J. Différence de réactivité a l'inducteur neurogène entre l'ectoblaste de l'aire opaque et celui de l'aire pellucide chez le Poulet. Experientia 26, 1353–1354 (1970). https://doi.org/10.1007/BF02113027
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DOI: https://doi.org/10.1007/BF02113027