Summary
In fertilizedXenopus eggs, shortly after egg rotation but well before the occurrence of the cleavage-associated “surface contraction waves”, two circular dark zones originate consecutively from the pigment spot marking the site of sperm entrance. They expand and travel centrifugally over the egg surface.
References
Balinsky, B.I.: Changes in the ultrastructure of amphibian eggs following fertilization. Acta Embryol. Morph. Exp.9, 132–154 (1966)
Grey, R.D., Wolf, D.P., Hedrick, J.L.: Formation and structure of the fertilization envelope inXenopus laevis. Devel. Biol.36, 44–61 (1974)
Hara, K.: “Double camera” time-lapse micro-cinematography; simultaneous filming of both poles of the amphibian egg. Mikroskopie26, 181–184 (1970)
Hara, K.: Cinematographic observation of “surface contraction waves” (SCW) during the early cleavage of axolotl eggs. Wilhelm Roux' Archiv167, 183–186 (1971)
Hengst, R.T.M., Reitsma, H.R.: A device for localized micro-extraction and injection of cytoplasm in the amphibian egg with simultaneous marking of the wound site. Mikroskopie (in press)
Klag, J.J., Ubbels, G.A.: Regional morphological and cytological differentiation in the fertilized egg ofDiscoglossus pictus (Anura). Differentiation3, 15–20 (1975)
Paleček, J., Ubbels, G.A.: Changes of pigment pattern upon sperm entry in the egg ofXenopus laevis. (in prep.)
Rybak, B., Gustafson, T.: Fécondation artificielle deXenopus laevis sans sacrifice du géniteur mâle. Experientia9, 25–26 (1953)
Sawai, T., Yoneda, M.: Wave of stiffness propagating along the surface of the newt egg during cleavage. J. Cell Biol.60, 1–7 (1974)
Ubbels, G.A., Hengst, R.T.M.: Cytoplasmic segregation during the symmetrisation of the fertilized egg ofXenopus laevis. (in prep.)
Verhoeff-de Fremery, R., Gorlee, W.A., Tydeman, P.: A method for collecting naturally fertilizedXenopus laevis eggs immediately after laying. (in prep.)
Wolf, D.P., Hedrick, J.L.: A molecular approach to fertilization II. Viability and artificial fertilization ofXenopus laevis gametes. Devel. Biol.25, 348–359 (1971)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hara, K., Tydeman, P. & Hengst, R.T.M. Cinematographic Observation of “Post-Fertilization waves” (PFW) on the zygote ofXenopus laevis . Wilhelm Roux' Archiv 181, 189–192 (1977). https://doi.org/10.1007/BF00848442
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00848442