QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by KAO, C.-Y. Articles by CHAMBERS, R. Search for Related Content PubMed Articles by KAO, C.-Y. Articles by CHAMBERS, R.

Journal of Experimental Biology 31,139-149 (1954)
Published by Company of Biologists 1954

Internal Hydrostatic Pressure of the Fundulus Egg : I. The Activated Egg

CHIEN-YUAN KAO ¹ and ROBERT CHAMBERS ¹

¹ Lilly Research Laboratories, Marine Biological Laboratory, Woods Hole, Mass

By means of a mercury manometer connected to a micropipette, the internal hydrostatic pressure of the unfertilized Fundulus egg was measured. Upon activation of the egg by micropuncture when the platelets in the cortex of the egg proper disappeared, there was a progressively increasing internal pressure which finally stabilized at 150 mm. Hg. The pressure was accompanied by the formation of a perivitelline space which contained a clear, colloidal material. The measured internal hydrostatic pressure of the egg was diminished by any means which decreased the perivitelline space. It was concluded that the perivitelline substance is the chief factor contributing to the pressure. The changes in volume of the egg proper are inversely proportional to the size of the perivitelline space, indicating that the surface of the egg proper is permeable to water.

Note:

Supported in part by a grant from the American Philosophical Society.

This article has been cited by other articles:

				J. E. Podrabsky, J. F. Carpenter, and S. C. Hand Survival of water stress in annual fish embryos: dehydration avoidance and egg envelope amyloid fibers Am J Physiol Regulatory Integrative Comp Physiol, January 1, 2001; 280(1): R123 - R131. [Abstract] [Full Text] [PDF]