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Echinobase
ECB-ART-38688
J Cell Biol 1965 Apr 01;25:SUPPL:161-7. doi: 10.1083/jcb.25.1.161.
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FURTHER STUDIES ON CELL DIVISION WITHOUT MITOTIC APPARATUS IN SEA URCHIN EGGS.

HIRAMOTO Y .


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A large quantity of paraffin oil, sucrose solution, or sea water was injected into the eggs of the heart urchin Clypeaster japonicus shortly before the onset of the first cleavage. The injected oil became spherical, pushing the mitotic apparatus aside. The sucrose solution mixed with the protoplasm and caused disintegration of the mitotic apparatus, and the sea water formed a vacuole at the center of the cell. In all these cases, cleavage may take place almost normally in spite of the absence of the mitotic apparatus or its displacement within the cell. In some eggs, furrowing may take place when more than fifty per cent of the endoplasm has been replaced with sea water before onset of cleavage.

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Genes referenced: LOC100887844 LOC115919910 LOC115925415

References [+] :
HIRAMOTO, Microinjection of the live spermatozoa into sea urchin eggs. 1962, Pubmed, Echinobase