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Journal of Cell Science, Vol 74, Issue 1 37-50, Copyright © 1985 by Company of Biologists

JOURNAL ARTICLES

Inhibition of cell spreading on the band of extracellular fibres in early chick and quail embryos

L Andries, C Vanroelen, J Van Hoof and L Vakaet

The ventral surface of the upper layer shows a band of extracellular fibrils around the anterior and lateral border of the area pellucida during gastrulation of the chick embryo. Using scanning electron microscopy, we found that this disposition is correlated with the motility of the middle-layer cells of gastrulating chick and quail embryos. Outside the fibrous band, single middle-layer cells and a sheet of mesoblast cells were spread out and possessed lamellae. Single cells on the fibrous band did not form lamellae. The same cell behaviour was obtained with the explants of deep layer on the fibrous band. The fibrous band is assumed to operate as a barrier that inhibits cell motility during gastrulation.




© The Company of Biologists Ltd 1985