Results
author = "Viegas, Wanda"
A concerted DNA methylation/histone methylation switch regulates rDNA gene dosage control and nucleolar dominance
Author(s) :
Silva, Manuela
,
Viegas, Wanda
,
Lawrence, Richard J.
,
Early, Keith
,
Pontes, Olga
,
Chen, Z.
,
Neves, Nuno
,
Pikaard, Craig.S.
Description :
Eukaryotes regulate the effective dosage of their ribosomal RNA (rRNA) genes, expressing fewer than half of the genes at any one time. Likewise, genetic hybrids displaying nucleolar dominance transcribe rRNA genes inherited from one parent but silence the other paraental set.We show that rRNA gene d...
Repository :
Repositório da Universidade Técnica de Lisboa
Language(s) :
English
Erasure of histone acetylation by Arabidopsis HDA6 mediates large-scale gene silencing in nucleolar dominance
Author(s) :
Silva, Manuela
,
Viegas, Wanda
,
Earley, Keith
,
Lawrence, Richard
,
Pontes, Olga
,
Reuther, Rachel
,
Enciso, Angel
,
Neves, Nuno
Description :
Nucleolar dominance describes the silencing of one parental set of ribosomal RNA (rRNA) genes in a genetic
hybrid, an epigenetic phenomenon that occurs on a scale second only to X-chromosome inactivation in
mammals. An RNA interference (RNAi) knockdown screen revealed that the predicted Arabidopsis ...
Repository :
Repositório da Universidade Técnica de Lisboa
Language(s) :
English
Postembryonic establishment of megabase-scale gene silencing in nucleolar dominance
Author(s) :
Silva, Manuela
,
Viegas, Wanda
,
Pontes, Olga
,
Lawrence, Richard
,
Preuss, Sasha
,
Costa-Nunes, Pedro
,
Earley, Keith
Description :
Nucleolar dominance is an epigenetic phenomenon in plant and animal genetic hybrids that describes the expression of 45S
ribosomal RNA genes (rRNA genes) inherited from only one progenitor due to the silencing of the other progenitor’s rRNA genes.
rRNA genes are tandemly arrayed at nucleolus organiz...
Repository :
Repositório da Universidade Técnica de Lisboa
Language(s) :
English
Transcriptionally active heterochromatin in rye B chromosomes
Author(s) :
Carchilan, Mariana
,
Delgado, Margarida
,
Ribeiro, Teresa
,
Nunes, Pedro Costa
,
Caperta, A.
,
Morais-Cecílio, L.
,
Jones, R. Neil
Description :
B chromosomes (Bs) are dispensable components of the genomes of numerous species. Thus far, there is a lack of evidence
for any transcripts of Bs in plants, with the exception of some rDNA sequences. Here, we show that the Giemsa bandingpositive
heterochromatic subterminal domain of rye (Secale cere...
Repository :
Repositório da Universidade Técnica de Lisboa
Language(s) :
English
Natural variation in nucleolar dominance reveals the relationship between nucleolus organizer chromatin topology and rRNA gene transcription in Arabidopsis
Author(s) :
Pontes, Olga
,
Lawrence, Richard J.
,
Neves, Nuno
,
Silva, Manuela
,
Lee, Jae-Hyeok
,
Chen, Z. Jeffrey
,
Viegas, Wanda
Description :
In genetic hybrids, nucleolus formation on chromosomes inherited from only one parent is the epigenetic phenomenon, nucleolar dominance. By using Arabidopsis suecica, the allotetraploid hybrid of Arabidopsis thaliana and Arabidopsis arenosa, natural variation in nucleolar dominance was found to occu...
Repository :
Europe PubMed Central
Language(s) :
English
Erasure of histone acetylation by Arabidopsis HDA6 mediates large-scale gene silencing in nucleolar dominance
Author(s) :
Earley, Keith
,
Lawrence, Richard J.
,
Pontes, Olga
,
Reuther, Rachel
,
Enciso, Angel J.
,
Silva, Manuela
,
Neves, Nuno
Description :
Nucleolar dominance describes the silencing of one parental set of ribosomal RNA (rRNA) genes in a genetic hybrid, an epigenetic phenomenon that occurs on a scale second only to X-chromosome inactivation in mammals. An RNA interference (RNAi) knockdown screen revealed that the predicted Arabidopsis ...
Repository :
Europe PubMed Central
Language(s) :
English
Postembryonic Establishment of Megabase-Scale Gene Silencing in Nucleolar Dominance
Author(s) :
Pontes, Olga
,
Lawrence, Richard J.
,
Silva, Manuela
,
Preuss, Sasha
,
Costa-Nunes, Pedro
,
Earley, Keith
,
Neves, Nuno
Description :
Nucleolar dominance is an epigenetic phenomenon in plant and animal genetic hybrids that describes the expression of 45S ribosomal RNA genes (rRNA genes) inherited from only one progenitor due to the silencing of the other progenitor's rRNA genes. rRNA genes are tandemly arrayed at nucleolus organiz...
Repository :
Europe PubMed Central
Language(s) :
English