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 DAN, K. Articles by KOJIMA, M. K. Search for Related Content PubMed Articles by DAN, K. Articles by KOJIMA, M. K.

Journal of Experimental Biology 40,7-14 (1963)
Published by Company of Biologists 1963

A Study on the Mechanism of Cleavage in the Amphibian Egg

K. DAN ¹ and M. KUNO KOJIMA ²

¹ Department of Biology, Tokyo Metropolitan University, Tokyo
² Sugashima Marine Biological Station, Nagoya University, Nagoya

1. In the eggs of the salamander, Triturus pyrrhogaster, there is an area extending about 1 mm. ahead of the advancing tip of the cleavage furrow where preparation for furrow formation is going on.

2. Severance of this area ahead of an advancing furrow tip does not stop the progress of the furrow. The furrow continues from this area.

3. The cleavage furrow of Triturus pyrrhogaster eggs advances strictly along a straight line.

4. A cut made across its path ahead of a furrow is healed as the furrow tip approaches sufficiently to allow its straight passage.

5. An excised piece of cortex which includes material taken from within 1 mm. of an advancing furrow tip will form a furrow and divide.

Note:

This research was supported in part by research grant of the Japanese Ministry of Education and in part by a grant-in-aid from the Rockefeller Foundation to Tokyo Metropolitan University.