Maturation of Rana temporaria and Acipenser stellatus oocytes induced by the cytoplasm of embryos at different cell cycle phases and at different stages of cleavage and blastulation
Autor: | L.V. Ryabova, T.A. Dettlaff |
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Rok vydání: | 1986 |
Předmět: |
Mitotic index
Embryo Nonmammalian Rana temporaria Xenopus Xenopus laevis Botany medicine Mitotic Index Animals Mitosis Germinal vesicle biology Cell Cycle Fishes Oocyte activation Cell Differentiation Blastula biology.organism_classification Cell biology medicine.anatomical_structure Blastocyst Cytoplasm Oocytes Cortical reaction Female Cell Division Developmental Biology |
Zdroj: | Cell differentiation. 18(1) |
ISSN: | 0045-6039 |
Popis: | Experiments involving injections of cytoplasm from the cleaving embryos of Rana temporaria and Acipenser stellatus into fully grown oocytes of the same species and of Xenopus laevis, show that at all mitotic phases, and throughout the period of synchronous cleavage divisions, the cytoplasm is characterized by high activity of the germinal vesicle breakdown factor. This activity decreases during nuclear division desynchronization and drops sharply after the mitotic index fall upon blastulation. Aside from germinal vesicle breakdown in the oocytes, the A. stellatus embryos' cytoplasm also induces development of a cortical reaction capacity. |
Databáze: | OpenAIRE |
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