Switch them off or not: selective rRNA gene repression in grasses.

Autor: Borowska-Zuchowska N; Plant Cytogenetics and Molecular Biology Group, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Katowice 40-032, Poland. Electronic address: natalia.borowska@us.edu.pl., Mykhailyk S; Plant Cytogenetics and Molecular Biology Group, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Katowice 40-032, Poland., Robaszkiewicz E; Plant Cytogenetics and Molecular Biology Group, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Katowice 40-032, Poland., Matysiak N; Department of Histology and Cell Pathology, the Medical University of Silesia in Katowice, School of Medicine with the Division of Dentistry, Zabrze, Poland., Mielanczyk L; Department of Histology and Cell Pathology, the Medical University of Silesia in Katowice, School of Medicine with the Division of Dentistry, Zabrze, Poland; Silesian Nanomicroscopy Centre in Zabrze, Silesia LabMed - Research and Implementation Centre, Medical University of Silesia, Katowice, Poland., Wojnicz R; Department of Histology and Cell Pathology, the Medical University of Silesia in Katowice, School of Medicine with the Division of Dentistry, Zabrze, Poland; Silesian Nanomicroscopy Centre in Zabrze, Silesia LabMed - Research and Implementation Centre, Medical University of Silesia, Katowice, Poland., Kovarik A; Department of Molecular Epigenetics, Institute of Biophysics, Czech Academy of Sciences, CZ-61200 Brno, Czech Republic., Hasterok R; Plant Cytogenetics and Molecular Biology Group, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Katowice 40-032, Poland. Electronic address: robert.hasterok@us.edu.pl.
Jazyk: angličtina
Zdroj: Trends in plant science [Trends Plant Sci] 2023 Jun; Vol. 28 (6), pp. 661-672. Date of Electronic Publication: 2023 Feb 08.
DOI: 10.1016/j.tplants.2023.01.002
Abstrakt: Nucleolar dominance (ND) is selective epigenetic silencing of 35-48S rDNA loci. In allopolyploids, it is frequently manifested at the cytogenetic level by the inactivation of nucleolar organiser region(s) (NORs) inherited from one or several evolutionary ancestors. Grasses are ecologically and economically one of the most important land plant groups, which have frequently evolved through hybridisation and polyploidisation events. Here we review common and unique features of ND phenomena in this monocot family from cytogenetic, molecular, and genomic perspectives. We highlight recent advances achieved by using an allotetraploid model grass, Brachypodium hybridum, where ND commonly occurs at a population level, and we cover modern genomic approaches that decipher structural features of core arrays of NORs.
Competing Interests: Declaration of interests The authors declare no conflict of interest.
(Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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