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Journal of Cell Science, Vol 13, 721-726, Copyright © 1973 by Company of Biologists

Submitted on March 14, 1973

Change in Surface Extensibility of Fundulus Deep Cells During Early Development

CHERYLL A. TICKLE 1 and J. P. TRINKAUS 2

1 Department of Biology, Yale University, New Haven, Connecticut, U.S.A., and Marine Biological Laboratory, Woods Hole, Massachusetts, U.S.A.; Department of Biology as Applied to Medicine, The Middlesex Hospital Medical School, London W1P 6DB, England
2 Department of Biology, Yale University, New Haven, Connecticut, U.S.A., and Marine Biological Laboratory, Woods Hole, Massachusetts, U.S.A.

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 cells from early gastrulae than cells from early blastulae. This finding correlates with the behaviour of deep cells in vivo: early blastula cells are rounded, form blebs, and do not engage in locomotion, whereas early gastrula cells form extended lobopodia and lamellipodia and engage actively in locomotion.

Submitted on March 14, 1973




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© The Company of Biologists Ltd 1973