| Identification of coiled body-like structures in meristematic cells of Pisum sativum cotyledonary buds. | |
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MedLine Citation:
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PMID: 10382075 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study focused on two types of nuclear bodies visible in plant cells that were previously thought to be similar to the coiled bodies (CBs) of animal cells: the nucleolus-associated body (NAB) and dense body (DB). We show that both NABs and DBs share common features with animal CBs: they consist of ribonucleoproteins, are silver-stainable, and lack DNA. Immunoelectron microscopy shows that only the NABs are rich in snRNAs and fibrillarin, two markers characteristic of animal CBs. This suggests that NABs rather than DBs are the plant counterparts of the CBs of animal cells. These structures appear most frequently in cells blocked in G0-1, their frequency gradually declining with resumption of the cell cycle and nucleolar activity. During this reactivation period, NABs are released from the nucleolus to the nucleoplasm, suggesting that they may act as nuclear transport or sorting structures. |
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Authors:
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A Jennane; M Thiry; G Goessens |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Chromosoma Volume: 108 ISSN: 0009-5915 ISO Abbreviation: Chromosoma Publication Date: 1999 May |
Date Detail:
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Created Date: 1999-07-15 Completed Date: 1999-07-15 Revised Date: 2000-12-18 |
Medline Journal Info:
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Nlm Unique ID: 2985138R Medline TA: Chromosoma Country: GERMANY |
Other Details:
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Languages: eng Pagination: 132-42 Citation Subset: IM |
Affiliation:
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Laboratory of cell Biology, University Moulay Ismail, Meknès, Maroc. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cell Nucleolus
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metabolism,
ultrastructure DNA, Plant / metabolism Immunohistochemistry Microscopy, Electron Peas / metabolism, ultrastructure* Ribonucleoproteins / metabolism |
| Chemical | |
Reg. No./Substance:
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0/DNA, Plant; 0/Ribonucleoproteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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