, Volume 9, Issue 1, pp 245–268

Permeability of egg membranes

Water exchange through the egg membranes of fundulus
  • Elizabeth M. Yagle

DOI: 10.1007/BF01943345

Cite this article as:
Yagle, E.M. Protoplasma (1930) 9: 245. doi:10.1007/BF01943345


  1. 1.

    A method is described for measuring the rate of water exchange through living membranes.

  2. 2.

    By this method definite rates of water exchange forFundulus eggs of different ages were established in solutions oi NaCl, KCl and CaCl2 of various molar concentrations. The effect of these salts in increasing permeability seems to be due to their cations, the order of effectiveness being Na>K>Ca.

  3. 3.

    Marked physiological differences in the membranes of eggs in various developmental stages are indicated.

  4. 4.

    The effect of the hydrogen-ion concentration of the solution on the rates of water exchange is of little significance.

  5. 5.

    Antagonistic effects of mixtures of salts are not evident in the time interval involved in the experiments.

  6. 6.

    The rÔles of the chorion and the vitelline membrane in the water and salt exchange of the egg ofFundulus are discussed.


Copyright information

© Verlag von Gebrüder Borntraeger 1930

Authors and Affiliations

  • Elizabeth M. Yagle
    • 1
    • 2
  1. 1.Zoology LaboratoryUniversity of PennsylvaniaUSA
  2. 2.Biological LaboratoryCold Spring HarborUSA

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