Temporal pattern of cleavage and the onset of gastrulation in amphibian embryos developed from eggs with the reduced cytoplasm

Y. Kobayakawa, H. Y. Kubota

研究成果: Contribution to journalArticle査読

63 被引用数 (Scopus)

抄録

Fertilized eggs of the Japanese newt, Cynops pyrrhogaster, were divided into 2 or 4 equal-sized parts with fine glass rods before the first cleavage. In such cases one of the egg fragments, at least, proceeds to cleavage and gastrulates. The temporal pattern of cell division and the onset of gastrulation in such half or quarter embryos were investigated and compared with normal development. The following results were obtained: (1) desynchronization starts two divisions earlier in quarter embryos and one division earlier in half embryos cmpared to whole embryos, (2) the time from the first cleavage to the onset of gastrulation does not widely vary among quarter, half or whole embryos and (3) the numbers of blastomeres which constitute embryos at the pigment stage decrease in proportion to the diminution of egg volume.

本文言語英語
ページ(範囲)83-94
ページ数12
ジャーナルJournal of Embryology and Experimental Morphology
Vol. 62
出版ステータス出版済み - 1 1 1981
外部発表はい

All Science Journal Classification (ASJC) codes

  • 解剖学
  • 胎生学
  • 発生生物学
  • 細胞生物学

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