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Arongaus, A.B.* ; Chen, S.* ; Pireyre, M.* ; Glöckner, N.* ; Galvão, V.C.* ; Albert, A. ; Winkler, J.B. ; Fankhauser, C.* ; Zeiser, K.* ; Ulm, R.*

Arabidopsis RUP2 represses UVR8-mediated flowering in noninductive photoperiods.

Genes Dev. 32, 1332-1343 (2018)
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Plants have evolved complex photoreceptor-controlled mechanisms to sense and respond to seasonal changes in day length. This ability allows plants to optimally time the transition from vegetative growth to flowering. UV-B is an important part intrinsic to sunlight; however, whether and how it affects photoperiodic flowering has remained elusive. Here, we report that, in the presence of UV-B, genetic mutation of REPRESSOR OF UV-B PHOTOMOR-PHOGENESIS 2 (RUP2) renders the facultative long day plant Arabidopsis thaliana a day-neutral plant and that this phenotype is dependent on the UV RESISTANCE LOCUS 8 (UVR8) UV-B photoreceptor. We provide evidence that the floral repression activity of RUP2 involves direct interaction with CONSTANS, repression of this key activator of flowering, and suppression of FLOWERING LOCUS T transcription. RUP2 therefore functions as an essential repressor of UVR8-mediated induction of flowering under noninductive short day conditions and thus provides a crucial mechanism of photoperiodic flowering control.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Sun Simulator ; Plant-environment Interaction ; Photoperiodism ; Flowering ; Uv-b Photoreceptor ; Uvr8 ; Arabidopsis; B-induced Photomorphogenesis; Transcription Factor Hy5; Uv-b; Locus-t; Floral Induction; Ft Protein; Photoreceptor Uvr8; Stress Acclimation; Distinct Roles; Seasonal Cues
Language english
Publication Year 2018
HGF-reported in Year 2018
ISSN (print) / ISBN 0890-9369
e-ISSN 1549-5477
Journal Genes and Development
Quellenangaben Volume: 32, Issue: 19-20, Pages: 1332-1343 Article Number: , Supplement: ,
Publisher Cold Spring Harbor Laboratory Press
Publishing Place 1 Bungtown Rd, Cold Spring Harbor, Ny 11724 Usa
Reviewing status Peer reviewed
Institute(s) Research Unit Environmental Simulation (EUS)
POF-Topic(s) 30202 - Environmental Health
Research field(s) Environmental Sciences
PSP Element(s) G-504991-001
DOI 10.1101/gad.318592.118
WOS ID WOS:000447716700008
Scopus ID 85054079903
PubMed ID 30254107
Erfassungsdatum 2018-09-28
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