Reversal of dorsoventral polarity in Xenopus laevis embryos by 180 degrees rotation of the animal micromeres at the eight-cell stage.
The 180 degrees rotation of the animal cell quartet at the 8-cell stage of Xenopus laevis embryos leads to a reversal of dorsoventral polarity in a majority of the embryos. Dorsal micromeres appear to instruct the macromeres in contact with them to initiate later steps in dorsal development. This inductive process is most apparent in the second half of the third cell cycle and is largely lost by the beginning of the fourth cell cycle.
Cardellini
P
P
Dipartimento di Biologia, Università di Padova, Italy.
D000818:Animals; D005314:Embryonic and Fetal Development; D007814:Larva / Q000648:ultrastructure; D012016:Reference Values; D014982:Xenopus laevis / Q000196:embryology*