An RdDM-independent function of Pol V transcripts in gene regulation and plant defence.
Journal
Nature plants
ISSN: 2055-0278
Titre abrégé: Nat Plants
Pays: England
ID NLM: 101651677
Informations de publication
Date de publication:
26 Aug 2024
26 Aug 2024
Historique:
received:
28
03
2024
accepted:
26
07
2024
medline:
27
8
2024
pubmed:
27
8
2024
entrez:
26
8
2024
Statut:
aheadofprint
Résumé
RNA polymerase V (Pol V) and Pol IV are known to be specialized for RNA-directed DNA methylation (RdDM). Here we report that Pol V, but not Pol IV, regulates hundreds of genes including jasmonic acid-responsive genes and confers plant defence to Botrytis cinerea and Spodoptera exigua. About half of the Pol V-regulated genes are associated with Pol V transcripts (PVTs). We thus hypothesized that some PVTs could regulate gene expression in an RdDM-independent manner. To test this hypothesis, we studied three PVTs, PVT-ERF5a/b and PVT-ERF6, as models. PVT-ERF5a/b and PVT-ERF6 are transcribed from the upstream regions of ERF5 and ERF6 and positively regulate their transcription, thereby regulating plant defence. Such regulation involves PVT-dependent H3K4me3 deposition and requires the DRD1-DMS3-RDM1 complex that mediates Pol V recruitment to the target loci. These findings highlight an unprecedented role for PVTs in regulating gene transcription, apart from serving as scaffold RNAs to direct DNA methylation.
Identifiants
pubmed: 39187700
doi: 10.1038/s41477-024-01774-0
pii: 10.1038/s41477-024-01774-0
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2024. The Author(s), under exclusive licence to Springer Nature Limited.
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