PMID: 8581301Dec 1, 1995Paper

The influence of B chromosomes on rDNA organization in rye interphase nuclei

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
M DelgadoWanda Viegas

Abstract

Patterns of rye rDNA organization in interphase nuclei were studied through the use of in situ hybridization in spreads of root meristem cells from plants with and without B chromosomes (Bs). In cells from plants without Bs each rDNA locus is organized as a single perinucleolar knob of condensed chromatin with decondensed chromatin inside the nucleolus. In plants with Bs there is a marked modification of the pattern, found in more than 23% of nuclei, which involves several regions of condensed chromatin interspersed with decondensed chromatin inside the nucleolus. This B-induced alteration in rDNA interphase organization suggests a change in expression of the rRNA genes located on the A chromosomes probably related to the reduction in nuclear RNA observed previously in plants with Bs. The influence of the Bs on the expression of A chromosome genes, through rearrangement of interphase chromatin, could provide the basis of an explanation for some of the known phenotypic effects of B chromosomes in rye.

References

Aug 1, 1993·Genome Génome / Conseil National De Recherches Canada·R BlundenR N Jones
Aug 1, 1994·Genome Génome / Conseil National De Recherches Canada·A Cuadrado, N Jouve
Sep 1, 1986·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·R SchlegelD Mettin

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Citations

Apr 1, 1996·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·L Morais-CecílioW Viegas
Jun 16, 2011·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Veit SchubertAndreas Houben
Mar 9, 2005·Cytogenetic and Genome Research·N NevesW Viegas
Jan 30, 2014·PloS One·Jolanta Kwasniewska, Agnieszka Mikolajczyk
Jan 5, 2006·Genome Génome / Conseil National De Recherches Canada·Pedro Costa-NunesWanda Viegas
Apr 6, 2000·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·I Fairlie, D Sumner

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