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Centrosomes with striated rootlets in rabbit zygotes

Published online by Cambridge University Press:  26 September 2008

M.S. Szöllösi,
P. Adenot and
D. Szöllösi
M.S. Szöllösi*
Affiliation:
Insitut de Biologie Physico-Chimique, Paries, and INRA, Jouy-en-Josas, France.
P. Adenot
Affiliation:
Insitut de Biologie Physico-Chimique, Paries, and INRA, Jouy-en-Josas, France.
D. Szöllösi
Affiliation:
Insitut de Biologie Physico-Chimique, Paries, and INRA, Jouy-en-Josas, France.
*
Maria S. Szöllösi, Laboratorire Associé INSERM/INRA, IBPC, 13, rue P.et M.curie, 75006 Paris, France. Fax: +33 1 43 29 80 88. e-mail: szollosi@apex.ibpc.fr.
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Summary

An electron microscopic study of the rabbit zygote has shown the presence of numerous paracrystalline structures (PSs) around the pronuclei. The majority of these structures are situated in the narrow space between pronuclei. The PSs during interphase are associated with small dense knobs, and filamentous material;some of them, namely those situated in the internuclear space, are also associated with striated rootlets. The PS and its appendages form a complex which nucleates microtubules during interphase and phase M. The structure of these complexes changes with the cell cycle. Striated rootlets disappear at G2/M. Dense Knobs and filamentous material separate from the PS, become loose and associate with numerous microtubules at the poles of the first mitotic spindle. PSs and their associated structures are considered to be a newly discovered morphological form of the centrosome.

Keywords

CentrosomeRabbit zygoteStriated rootlet

Information

Type
Article
Information
Zygote , Volume 4 , Issue 3 , August 1996, pp. 173 - 179
Copyright
Copyright © Cambridge University Press 1996

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