XB-IMG-83237
Xenbase Image ID: 83237
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Fig. 1. Biomechanical interpretation of gastrulation
events in amphibian embryos. (AD,
E1, E2) Biomechanical �maps� of successive
stages and most important regions of
embryos. Active forces are displayed by red
arrows, while passive stresses are indicated by
blue arrows. (A) Stretching of the blastocoel
(br) roof by turgor pressure in the blastocoel.
(B) RCI in the blastocoel roof producing pressure
forces onto vegetal regions. (C) A detailed
scheme of the region framed in (B). (D) Two
alternating phases of biomechanical interactions
between the marginal zone (MZ) and the
suprablastoporal zone (SBZ). (E1, E2) Successive
stages of the involution in saggital section.
Frames (ab,c,d,e) display suggested hyper-restoration responses that correspond to the upper row frames indicated by the same capital letters (ab
corresponds to A and B together). Dotted arrows connect the active branches of preceding hyper-restoration responses with the shifts of stress values
which they produce in the neighboring parts of embryos triggering the latter�s active responses. Pre, preinvoluted; pst, postinvoluted layer. 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 |