.... These data combine to suggest a multistep model to explain how cell intercalation can occur against a force gradient to generate axial extension forces. First, polarized lamellipodia extend mediolaterally and make new C-cadherin-based contacts with neighboring mesodermal cell bodies. Second, lamellipodial...

... † Present address: Departamento de Anatomía y Embriología Humana I, Facultad de Medicina, UCM, 28040 Madrid, Spain ‡ Present address: Facultad de Ciencias de la Salud, Universidad Diego Portales, Santiago, Chile 29 8 2007 © 2007. 2007 Extension Prechordal plate Axial...

... tracing in ppt;ntl and kny;ntl mutants demonstrates that the ventral derived posterior tailbud progenitors move into the tailbud. However,gastrulation-like convergence and extension movements and cell movements within the posterior tailbud are impaired. Furthermore, subduction movements of cells...

...Nathalia S. Glickman; Charles B. Kimmel; Martha A. Jones; Richard J. Adams Promptly after the notochord domain is specified in the vertebrate dorsal mesoderm, it undergoes dramatic morphogenesis. Beginning during gastrulation,convergence and extension movements change a squat cellular array...

... and extension movements that drive Xenopus gastrulation. Thus, PAPC is not only an adhesion molecule but also a component of the machinery that drives gastrulation movements in Xenopus . PAPC may provide a link between regulatory genes in Spemann’s organizer and the execution of cell behaviors during...

... and the chemosensory antennal organ. * Author for correspondence (e-mail: [email protected] ) 28 7 1998 30 9 1998 © 1998 by Company of Biologists 1998 Salivary gland Salivary duct eye gone Imaginal ring Convergence Extension Drosophila Pax The ability...

... and extension, and tail morphogenesis. These mutations provide an approach to understanding the genetic control of gastrulation in vertebrates. * Author for correspondence (e-mail: [email protected] ) ** Present address: Laboratory for Physiological Chemistry, Utrecht University...

... in ovary morphogenesis, the basal stalks and interfollicular stalks, also form by cell rearrangement utilizing a convergence and extension mechanism. Terminal filament formation depends on the Bric à brac protein, which is expressed in the nuclei of terminal filament cells and is cell autonomously required...

.... The behavior of individual cells during germband extension was investigated by epi-illumination and time-lapse video microscopy of living embryos. Cells intercalate between their dorsal and ventral neighbors during extension, increasing the number of cells along the anterior-posterior axis while decreasing...

... and extension of the Xenopus neural plate . Dev. Dynam . 193 , 199 – 217 . 10.1002/aja.1001930302 Keller , R. E. , Shih , J. and Domingo , C. ( 1992b ). The patterning and functioning of protrusive activity during convergence and extension of the Xenopus organizer . Development...

...Ray Keller; John Shih; Carmen Domingo ABSTRACT We discuss the cellular basis and tissue interactions regulating convergence and extension of the vertebrate body axis in early embryogenesis of Xenopus . Convergence and extension occur in the dorsal mesoderm (prospective notochord and somite...

...Ray Keller; Mike Danilchik We show with time-lapse micrography that narrowing in the circumblastoporal dimension (convergence) and lengthening in the animal-vegetal dimension (extension) of the involuting marginal zone (IMZ) and the noninvoluting marginal zone (NIMZ) are the major tissue movements...

...De-Li Shi; Michel Delarue; Thierry Darribére; Jean-François Riou; Jean-Claude Boucaut The capacity for extension of the dorsal marginal zone (DMZ) in Pleurodeles waltl gastrulae was studied by scanning electron microscopy and grafting experiments. At the onset of gastrulation, the cells...