Understanding the patterning of these dynamic features of cell behaviour is important and will require analysis of signalling at much greater spatial and temporal resolution than that has been typical in the analysis of patterning tissue differentiation. zone, which was defined as the region that is marginal to and above the blastopore. It is not the nature of the cell behaviour alone, but the context, the biomechanical connectivity and spatial and temporal pattern of its expression that determine specificity of morphogenic output during gastrulation and blastopore closure. They are expressed progressively along presumptive lateral–medial and anterior–posterior axes of the body plan in highly ordered geometries of functional significance in the context of the biomechanics of blastopore closure, thereby accounting for the production of similar patterns of circumblastoporal forces. and the pathway of chordamesoderm migration over the matrix in Xenopus. Although these cell behaviours are quite different and involve different germ layers and tissue organization, they are expressed in similar patterns. marginal zone turns inward over the blastopore lip and then back on itself (Fig. Synonyms: ventral blastopore lip, ventral blastopore groove Definition: 'Ventral part of the blastopore lip, which forms as a result of the contraction of bottle cells.' Stage Range: NF stage 10. during Xenopus gastrulation: separable effects on blastopore closure. Park, S.K., Chungnam National University. blastopore closure and archenteron formation in a single embryo are presented. Mediolateral cell intercalation behaviour and epithelial–mesenchymal transition are used in different combinations in several species of amphibian to generate a conserved pattern of circumblastoporal hoop stresses. Dynamic regulation of LARG in blastopore closure and archenteron formation during Xenopus laevis gastrulation 2010. embryonic development, including the position of the blastopore, in the normal as. We review the dynamic patterns of cell behaviours in the marginal zone of amphibians with a focus on how the progressive nature and the geometry of these behaviours drive blastopore closure. steps in the dorsalization and axialization of the Xenopus egg and.

Xenopus blastopore