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 Google Scholar Google Scholar Articles by Ijiri, K.-I. Articles by Egami, N. Search for Related Content PubMed Articles by Ijiri, K.-I. Articles by Egami, N. Social Bookmarking                         What's this?

Mitotic activity of germ cells during normal development of Xenopus laevis tadpoles

Zoological Institute, University of Tokyo

¹ Authors' address: Zoological Institute, Faculty of Science, University of Tokyo, Hongo, Tokyo 113, Japan.

Received for publication 2 June 1975.

SUMMARY

Data on the spatio-temporal pattern of germ cell proliferation in Xenopus laevis tadpoles were obtained, tracing the germ cells from the cloacal position forward. This spatial pattern in germ cell distribution and its change during normal development clearly coincided with histological observations of germ gland development. By application of regression lines to the analysis of this complex pattern, an interesting conclusion about the mitotic activity of germ cells was suggested. While the mitotic activity of germ cells before sexual differentiation shows a regional difference along the germ-cell-containing ridge (GCCR), the doubling time of sexually differentiated gonia seems to show a uniform value over the whole GCCR

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?