Nom du corpus

Corpus Systématique Animale

Titre du document

Pattern of activity of nucleolus organizers during spermatogenesis in mammals as analyzed by silver-staining

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mammiferes_v2b_01362
PMID
Auteur(s)
  • F. J. Hofgärtner 1
  • M. Schmid 1
  • W. Krone 1
  • Maria T. Zenzes 2
  • W. Engel 3
Affiliation(s)
  • 1) Abteilung Humangenetik, University of Ulm, P.O. Box 4066, 7900, Ulm, Germany
  • 2) Institut für Humangenetik und Anthropologie, University of Freiburg, Germany
  • 3) Institut für Humangenetik, University of Göttingen, Germany
Résumé

Silver-staining in the nuclei and chromosomes of spermatogenesis of four species of mammals (Man, Mus musculus, Rattus norvegicus, and Cavia cobaya) was investigated qualitatively and quantitatively. These species show a very similar pattern of activity of the nucleolus organizer regions (NORs) during the various stages of spermatogenesis. Silver precipitates are detectable in growing spermatogonia and up until the pachytene stage of meiotic prophase. During the meiotic metaphases I and II and during interkinesis silver-stainability disappears completely. A resumption of silverstainability occurs in round spermatids indicating a postmeiotic reactivation of NORs. This process does not persist beyond the early elongation phase. The quantitative determination of the silver-covered areas in relation to the total nuclear areas reveals minor differences between the species investigated with regard to the times and extents of maximum activation. The known localizations of the NORs in the karyotypes of the species investigated was confirmed using metaphase-preparations derived from somatic tissues.

Catégories Science-Metrix
  • 1 - health sciences
  • 2 - biomedical research
  • 3 - developmental biology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - genetique des eucaryotes. evolution biologique et moleculaire
Catégories Scopus
  • 1 - Health Sciences ; 2 - Medicine ; 3 - Genetics(clinical)
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Genetics
Catégories WoS
  • 1 - science ; 2 - genetics & heredity
  • 1 - science ; 2 - biochemistry & molecular biology
Identifiant ISTEX
3ECEA1300AF3784EEB500523F5F6B55F9C7CB517
Revue

Chromosoma

Année de publication
1979
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.836
Sous-corpus
  • Mammiferes
Type de publication
Journal
ark:/67375/1BB-KFGDJ8BR-7
Powered by Lodex 9.3.8