The histone modification H3 lysine 27 tri-methylation has conserved gene regulatory roles in the triplicated genome of Brassica rapa L.
Brassica
FLOWERING LOCUS C
epigenetics
histone H3 lysine 27 tri-methylation
vernalization
Journal
DNA research : an international journal for rapid publication of reports on genes and genomes
ISSN: 1756-1663
Titre abrégé: DNA Res
Pays: England
ID NLM: 9423827
Informations de publication
Date de publication:
01 Oct 2019
01 Oct 2019
Historique:
received:
15
07
2019
accepted:
30
08
2019
entrez:
18
10
2019
pubmed:
18
10
2019
medline:
27
3
2020
Statut:
ppublish
Résumé
Brassica rapa L. is an important vegetable and oilseed crop. We investigated the distribution of the histone mark tri-methylation of H3K27 (H3K27me3) in B. rapa and its role in the control of gene expression at two stages of development (2-day cotyledons and 14-day leaves) and among paralogs in the triplicated genome. H3K27me3 has a similar distribution in two inbred lines, while there was variation of H3K27me3 sites between tissues. Sites that are specific to 2-day cotyledons have increased transcriptional activity, and low levels of H3K27me3 in the gene body region. In 14-day leaves, levels of H3K27me3 were associated with decreased gene expression. In the triplicated genome, H3K27me3 is associated with paralogs that have tissue-specific expression. Even though B. rapa and Arabidopsis thaliana are not closely related within the Brassicaceae, there is conservation of H3K27me3-marked sites in the two species. Both B. rapa and A. thaliana require vernalization for floral initiation with FLC being the major controlling locus. In all four BrFLC paralogs, low-temperature treatment increases H3K27me3 at the proximal nucleation site reducing BrFLC expression. Following return to normal temperature growth conditions, H3K27me3 spreads along all four BrFLC paralogs providing stable repression of the gene.
Identifiants
pubmed: 31622476
pii: 5588861
doi: 10.1093/dnares/dsz021
pmc: PMC6796510
doi:
Substances chimiques
Histones
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
433-443Informations de copyright
© The Author(s) 2019. Published by Oxford University Press on behalf of Kazusa DNA Research Institute.
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