Document Detail

Structural changes of Ag-stained nucleolus organizing regions and nucleoli during meiosis in Allium flavum.
MedLine Citation:
PMID:  6652567     Owner:  NLM     Status:  MEDLINE    
Microsporogenesis of Allium flavum was investigated by light microscopy using a silver impregnation technique. Ag-positive structures were present at the nucleolus organizing regions (NORs) in all stages of the meiotic cycle. During prophase I the nucleoli were found to be composed of a strongly impregnated central and a weakly impregnated peripheral component, probably corresponding to the pars fibrosa and pars granulosa, respectively. A heteromorphism with regard to the presence of a NOR allowed the determination of the crossing-over frequency in the chromosome arm concerned.
J Loidl; J Greilhuber
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Canadian journal of genetics and cytology. Journal canadien de génétique et de cytologie     Volume:  25     ISSN:  0008-4093     ISO Abbreviation:  Can. J. Genet. Cytol.     Publication Date:  1983 Oct 
Date Detail:
Created Date:  1984-02-14     Completed Date:  1984-02-14     Revised Date:  2007-07-24    
Medline Journal Info:
Nlm Unique ID:  0372706     Medline TA:  Can J Genet Cytol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  524-9     Citation Subset:  IM    
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MeSH Terms
Cell Nucleolus / ultrastructure*
Crossing Over, Genetic
Nucleolus Organizer Region / ultrastructure*
Silver / diagnostic use
Reg. No./Substance:

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