Ingression during Early Gastrulation of Fundulus
نویسندگان
چکیده
منابع مشابه
Surface Specializations of Fundulus Cells and Their Relation to Cell Movements during Gastrulation
Cell movements in Fundulus blastoderms during gastrulation were studied utilizing time-lapse cinemicrography and electron microscopy. Time-lapse films reveal that cells of the enveloping layer undulate and sometimes separate briefly but remain together in a cohesive layer. During epiboly, the marginal enveloping layer cells move over the periblast as it expands over the yolk sphere. Movement oc...
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Gastrulation generates three layers of cells (ectoderm, mesoderm, endoderm) from a single sheet, while large scale cell movements occur across the entire embryo. In amniote (reptiles, birds, mammals) embryos, the deep layers arise by epithelial-to-mesenchymal transition (EMT) at a morphologically stable midline structure, the primitive streak (PS). We know very little about how these events are...
متن کاملThe midblastula transition, the YSL transition and the onset of gastrulation in Fundulus.
The first signs of cell motility appear in Fundulus toward the end of cleavage, after cleavages 11 and 12. When blastomers cease cleaving, their surfaces undulate and form blebs. At first, these blebbing cell remain in place. Gradually thereafter they begin movement, with blebs and filolamellipodia serving as organs of locomotion. Non-motile cleaving blastomeres have thus differentiated into mo...
متن کاملChanges in surface extensibility of Fundulus deep cells during early development.
The extensibility of the periphery of the deep cells of the Fundulus blastoderm was investigated by applying negative pressure to the cell surface in culture by means of a micropipette. The relative negative pressure required to produce standard deformations of the surface was measured for cells from embryos in 2 different stages of development. Less negative pressure was required to deform cel...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 1996
ISSN: 0012-1606
DOI: 10.1006/dbio.1996.0169