Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Spatial and Temporal Changes in Early Amphibian Development

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites

image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Following fertilization in Xenopus eggs, the dorsal-ventral asymmetry of the egg is established and a rapid cell cycle is begun. In the mid to late blastula period this initial asymmetry is translated into differentiation of the dorsal mesoderm initiated by the vegetal dorsalizing center; as suggested by experiments of Nieuwkoop. About this time the cell cycle undergoes a modification coincident with several events including the onset of cell motility. We report here on experiments describing how the dorsal-ventral asymmetry is produced in the early period. In particular we discuss the role of the sperm, its associated aster, the cortex, and redistribution of cytoplasmic contents. This analysis furthers our understanding of UV effects on dorsalization and the mechanism of twinning. We report also on evidence for a cytoplasmic clock regulating the cycle of DNA synthesis and cytokinesis in early cleavage, as well as on further experiments on the mechanism of cell cycle changes in the midblastula period.

Affiliations: 1: Department of Biochemistry and Biophysics, School of Medicine, University of California, San Francisco, California; 2: (Department of Molecular Biology, University of California, Berkeley, California


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation