Phytochrome-dependent responsiveness to root-derived cytokinins enables coordinated elongation responses to combined light and nitrate cues.
Arabidopsis
/ metabolism
Arabidopsis Proteins
/ metabolism
Plant Roots
/ metabolism
Light
Nitrates
/ metabolism
Cytokinins
/ metabolism
Gene Expression Regulation, Plant
/ radiation effects
Phytochrome
/ metabolism
Signal Transduction
Hypocotyl
/ growth & development
Zeatin
/ metabolism
Transcription Factors
/ metabolism
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
01 Oct 2024
01 Oct 2024
Historique:
received:
22
12
2023
accepted:
23
09
2024
medline:
2
10
2024
pubmed:
2
10
2024
entrez:
1
10
2024
Statut:
epublish
Résumé
Plants growing at high densities can detect competitors through changes in the composition of light reflected by neighbours. In response to this far-red-enriched light, plants elicit adaptive shade avoidance responses for light capture, but these need to be balanced against other input signals, such as nutrient availability. Here, we investigated how Arabidopsis integrates shade and nitrate signalling. We unveiled that nitrate modulates shade avoidance via a previously unknown shade response pathway that involves root-derived trans-zeatin (tZ) signal and the BEE1 transcription factor as an integrator of light and cytokinin signalling. Under nitrate-sufficient conditions, tZ promotes hypocotyl elongation specifically in the presence of supplemental far-red light. This occurs via PIF transcription factors-dependent inhibition of type-A ARRs cytokinin response inhibitors. Our data thus reveal how plants co-regulate responses to shade cues with root-derived information about nutrient availability, and how they restrict responses to this information to specific light conditions in the shoot.
Identifiants
pubmed: 39353942
doi: 10.1038/s41467-024-52828-y
pii: 10.1038/s41467-024-52828-y
doi:
Substances chimiques
Arabidopsis Proteins
0
Nitrates
0
Cytokinins
0
Phytochrome
11121-56-5
Zeatin
7I6OOJ9GR6
Transcription Factors
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8489Subventions
Organisme : Nederlandse Organisatie voor Wetenschappelijk Onderzoek (Netherlands Organisation for Scientific Research)
ID : Vici 865.17.002
Organisme : European Molecular Biology Organization (EMBO)
ID : ALTF 828-2020
Organisme : EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)
ID : 101026742
Informations de copyright
© 2024. The Author(s).
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