The CLE33 peptide represses phloem differentiation via autocrine and paracrine signaling in Arabidopsis.
Journal
Communications biology
ISSN: 2399-3642
Titre abrégé: Commun Biol
Pays: England
ID NLM: 101719179
Informations de publication
Date de publication:
06 06 2023
06 06 2023
Historique:
received:
13
04
2023
accepted:
23
05
2023
medline:
8
6
2023
pubmed:
7
6
2023
entrez:
6
6
2023
Statut:
epublish
Résumé
Plant meristems require a constant supply of photoassimilates and hormones to the dividing meristematic cells. In the growing root, such supply is delivered by protophloem sieve elements. Due to its preeminent function for the root apical meristem, protophloem is the first tissue to differentiate. This process is regulated by a genetic circuit involving in one side the positive regulators DOF transcription factors, OCTOPUS (OPS) and BREVIX RADIX (BRX), and in the other side the negative regulators CLAVATA3/EMBRYO SURROUNDING REGION RELATED (CLE) peptides and their cognate receptors BARELY ANY MERISTEM (BAM) receptor-like kinases. brx and ops mutants harbor a discontinuous protophloem that can be fully rescued by mutation in BAM3, but is only partially rescued when all three known phloem-specific CLE genes, CLE25/26/45 are simultaneously mutated. Here we identify a CLE gene closely related to CLE45, named CLE33. We show that double mutant cle33cle45 fully suppresses brx and ops protophloem phenotype. CLE33 orthologs are found in basal angiosperms, monocots, and eudicots, and the gene duplication which gave rise to CLE45 in Arabidopsis and other Brassicaceae appears to be a recent event. We thus discovered previously unidentified Arabidopsis CLE gene that is an essential player in protophloem formation.
Identifiants
pubmed: 37280369
doi: 10.1038/s42003-023-04972-2
pii: 10.1038/s42003-023-04972-2
pmc: PMC10244433
doi:
Substances chimiques
Arabidopsis Proteins
0
Membrane Proteins
0
Peptides
0
CLE45 protein, Arabidopsis
0
Banques de données
Dryad
['10.5061/dryad.x69p8cznw']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
588Informations de copyright
© 2023. The Author(s).
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