| Centrosome inheritance in the parthenogenetic egg of the collembolan Folsomia candida. | |
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MedLine Citation:
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PMID: 16906420 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Unfertilized eggs commonly lack centrioles, which are usually provided by the male gamete at fertilization, and are unable to assemble functional reproducing centrosomes. However, some insect species lay eggs that develop to adulthood without a contribution from sperm. We report that the oocyte of the parthenogenetic collembolan Folsomia candida is able to self-assemble microtubule-based asters in the absence of pre-existing maternal centrosomes. The asters, which develop near the innermost pole of the meiotic apparatus, interact with the female chromatin to form the first mitotic spindle. The appearance of microtubule-based asters in the cytoplasm of the activated Folsomia oocyte might represent a conserved mechanism for centrosome formation during insect parthenogenesis. We also report that the architecture of the female meiotic apparatus and the structure of the mitotic spindles during the early embryonic divisions are unusual in comparison with that of insects. |
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Authors:
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Maria Giovanna Riparbelli; Rosanna Giordano; Giuliano Callaini |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-08-12 |
Journal Detail:
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Title: Cell and tissue research Volume: 326 ISSN: 0302-766X ISO Abbreviation: Cell Tissue Res. Publication Date: 2006 Dec |
Date Detail:
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Created Date: 2006-11-22 Completed Date: 2007-08-15 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417625 Medline TA: Cell Tissue Res Country: Germany |
Other Details:
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Languages: eng Pagination: 861-72 Citation Subset: IM |
Affiliation:
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Department of Evolutionary Biology, University of Siena, Via A. Moro 2, 53100 Siena, Italy. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Arthropods / embryology, genetics* Centrosome / physiology* Embryo, Nonmammalian Extrachromosomal Inheritance* Female Oocytes / cytology, physiology, ultrastructure Ovum / cytology, physiology*, ultrastructure Parthenogenesis / physiology* Propidium / metabolism |
| Chemical | |
Reg. No./Substance:
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36015-30-2/Propidium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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