PMID: 8581302Dec 1, 1995Paper

Reprogramming of rye rDNA in triticale during microsporogenesis

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

Abstract

To test the hypothesis that interspecific genomic and chromosome interactions leading to nucleolar dominance could be reprogrammed in meiosis, we compared the expression of distinct nucleolar organizing region (NOR) loci in hexaploid triticale root tip meristematic cells, pollen mother cells and young pollen grains. Interphase and metaphase cells were silver stained to quantify nucleoli and active NOR loci respectively. A marked difference in the ribosomal RNA gene activity of each locus was observed when different types of cells were compared: in somatic and pollen mother cells, rRNA gene activity was mainly restricted to major wheat NORs (1B and 6B) with only a small contribution from rye NORs (1R). In contrast, in young pollen grains, all NORs present, including the 1R NORs, were consistently active. The expression of all NORs just after meiosis is considered to be a consequence of meiotic reprogramming of rye origin rDNA. Gene reprogramming mediated by the resetting of methylation patterns established early in embryogenesis is suggested to be responsible for the differential expression of the NORs of rye origin in distinct developmental stages of triticale.

References

Sep 1, 1985·Stain Technology·H R Hubbell
Feb 1, 1988·Heredity·R JimènezR Diaz de la Guardia
Dec 5, 1988·Journal of Molecular Biology·R B FlavellW F Thompson
Dec 5, 1988·Journal of Molecular Biology·W F Thompson, R B Flavell
Jun 1, 1987·Nature·R Holliday
Nov 1, 1985·The Journal of Cell Biology·R H Reeder
Mar 1, 1984·Journal of the Neurological Sciences·G M HochwaldJ Gorelick
May 1, 1995·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·A CastilhoW Viegas
Jun 1, 1988·Proceedings of the National Academy of Sciences of the United States of America·J P GustafsonS Petrovic
Aug 1, 1995·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·N NevesW Viegas
Jan 1, 1984·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·J R LacadenaJ L Santos
Sep 1, 1982·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·J Hutchinson, T E Miller

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Citations

May 1, 1995·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·A CastilhoW Viegas
Mar 8, 2000·Microbiology and Molecular Biology Reviews : MMBR·A R Leitch
Mar 9, 2005·Cytogenetic and Genome Research·N NevesW Viegas
May 1, 2009·PloS One·Songthip OunpraseuthCraig A Cooney
Nov 28, 2018·Journal of Experimental Botany·Natalia Borowska-ZuchowskaRobert Hasterok

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