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KMID : 0364219830260030193
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Korean Journal of Zoology
1983 Volume.26 No. 3 p.193 ~ p.202
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Effects on the Development by Redistribution of the Egg Cytoplasm: Correlation between Inversion and Cleabage Pattern of the Amphibian Eggs
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Chung Hae-Moon
Kim Pyeung-Hyeun
Kim Duk-Hee
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Abstract
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Inversion at variable time of the uncleaved eggs of Rana nigromaculata and Rana dybowskii was emplyed to study the mechanisms of early embryogenesis. The response to inversion varied between those two spcies. If the eggs were inverted at early time it was possible to change the site of the first cleavage furrow of Rana nigromaculata-it appeared on the original vegetal hemisphere (OpG side). However, the first cleavage furrow of Rana dybowskii was not changed at all no matter what its inversin time was-it always appeared on the original animal hemisphere (G. side). In the inverted Rana nigromaculata embryos the size of the blastomeres on the vegetal hemisphere was always smaller than those of animal hemisphere. On the ocntrary, the cleavage pattern of Rana dybowskii was not altered. Results of the histological works for the inverted eggs suggest that the different responses to inversion might be caused by the fact that the extent to which the redistribution of the egg components such as cleavage nuclei and yolk platelets are different.
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