Plasticity and rigidity of differentiation of brain vesicles studied in quail-chick chimeras

Cell Differ. 1986 Oct;19(3):187-93. doi: 10.1016/0045-6039(86)90095-3.


Transplantation of a piece of the alar plate of the prosencephalon or of the rhombencephalon of quail embryos into the roof of the mesencephalon of chick embryos was carried out at 7-10 somite stage. Results obtained were: the transplanted alar plate of the prosencephalon differentiated into tissue closely resembling the tectum when the transplants were integrated into the host mesencephalon; in all the cases, the alar plate of the rhombencephalon did not differentiate into tectum-like structure, but into rhombencephalic descendants. We conclude that the alar plate of the prosencephalon at 7-10 stage is not definitively determined and may retain an ability to differentiate into the optic tectum, whereas the prospective fate of the rhombencephalon has already been determined at 7-10 stage.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Brain / cytology
  • Brain / embryology*
  • Cell Differentiation
  • Chick Embryo
  • Chimera*
  • Coturnix
  • Embryo, Nonmammalian
  • Mesencephalon / embryology
  • Rhombencephalon / cytology
  • Rhombencephalon / embryology
  • Rhombencephalon / transplantation
  • Superior Colliculi / embryology