Xenbase Image ID: 83242

Fig. 6. Inversion of cell convergence movements as a result of a dorso-medial cut of early gastrula stage X. laevis embryos. In the vertical panels (A,B,D), left rows are optical light views and right rows luminescent views of the same embryos at the different time periods after cuts (shown to the left). In panels (C), only luminescent views are given. In (A-C), the descendants of two ventral blastomeres at 32 cell stage are labeled, while in panel (D), the descendants of the same stage 2 dorsal blastomeres are labeled. (A) Normal dorsalwards convergent movements of a labeled ventral tissue. 24 h embryos from this panel are shown from the left side while all the others are displayed in the vegetal projection. (B) Inversion of the labeled cell movements towards ventral midline as a result of a dorso-medial cut. Note that at 24 h, an abnormal tail is formed from these cells in the ventral location. (C) If making a similar dorso-medial cut of an isolated marginal zone, no labeled cell convergence towards a ventral midline takes place. (D) After an operation similar to that shown in panel (B), the descendents of the dorsal labeled cells move to the ventral side, that is, opposite to the normal convergence direction. As a result, they spread along the lateral lips of the blastopore. Image published in: Beloussov LV et al. (2006) Copyright © 2006. Reproduced with permission of the Publisher, University of the Basque Country Press. Larger Image Printer Friendly View

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