Document Detail

Lacandonia granules are present in Ginkgo biloba cell nuclei.
MedLine Citation:
PMID:  12566224     Owner:  NLM     Status:  MEDLINE    
Lacandonia schismatica is a rare flowering plant with the sex organs spatially inverted. Several aspects of its cell biology are now known. Interestingly, within the cell nucleus, the chromatin is reticulated and it is associated to a novel structure named Lacandonia granules, a very abundant ribonucleoprotein particle showing similarities to perichromatin and Balbiani ring granules, which are involved in nuclear mRNA metabolism. To see whether these particles are present in other plants, we study the nucleus of Ginkgo biloba, a non-flowering plant. Light, electron and atomic force microscopy show that the cell nuclei of G. biloba are reticulated. Ultrastructural analysis showed that in the nucleoplasm, abundant intranuclear particles 32 nm in diameter are present. The EDTA regressive staining suggested that they contain RNA. Ultrastructural in situ hybridization confirmed the presence of RNA in these particles. Therefore, we conclude that the nuclei of G. biloba are reticulated and contain Lacandonia granules. We suggest that these particles may also be present in other plants.
Jaime Jiménez-Ramírez; Lourdes Teresa Agredano-Moreno; María de Lourdes Segura-Valdez Md; Luis Felipe Jiménez-García
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biology of the cell / under the auspices of the European Cell Biology Organization     Volume:  94     ISSN:  0248-4900     ISO Abbreviation:  Biol. Cell     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2003-02-04     Completed Date:  2003-11-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8108529     Medline TA:  Biol Cell     Country:  France    
Other Details:
Languages:  eng     Pagination:  511-8     Citation Subset:  IM    
Herbarium, Department of Comparative Biology, Faculty of Sciences, UNAM, Mexico City 04510, Mexico.
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MeSH Terms
Cell Nucleus / ultrastructure*
Chromatin / chemistry,  ultrastructure
Ginkgo biloba / cytology,  ultrastructure*
In Situ Hybridization
Microscopy, Atomic Force
Microscopy, Electron
Plants / ultrastructure*
RNA / analysis
Reg. No./Substance:
0/Chromatin; 63231-63-0/RNA

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