Experientia

, Volume 3, Issue 1, pp 30–32 | Cite as

Sur l'apparition d'organes variés dans l'ectoblaste, à la suite de la centrifugation de la blastula et de la gastrula chez les Amphibiens

  • J. Pasteels
Kurze Mitteilungen

Summary

The centrifugation of the Amphibia blastula or gastrula produces in the ectoblastic area the appearance of complexes of ecto- and mesoblastic organs. Experiments of explantations and cultivationin vitro and also of grafts on a normal embryo demonstrate that those very abnormal secundary embryos are formed without any intervention of the normal organizer. The ectoblastic cells that undergo this increase of morphogenetic potential are characterized by a great concentration of ribonucleic acid in their cytoplasm (this part of work in collaboration withJ. Brachet). Those secundary embryos vary greatly in their frequence, their nature, and their location, depending on the stage in which the centrifugation was done. It is supposed that the nature of the organs formed is dependent on the degree of potency attained by the ectoblast at the time when the reaction arises that is produced by the cellular trauma.

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Copyright information

© Birkhäuser Verlag 1947

Authors and Affiliations

  • J. Pasteels
    • 1
  1. 1.Laboratoire d'embryologieFaculté de médecine de l'Université de BruxellesBelgium

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