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The CLE33 peptide represses phloem differentiation via autocrine and paracrine signaling in Arabidopsis.
Carbonnel, Samy; Cornelis, Salves; Hazak, Ora.
Afiliação
  • Carbonnel S; Department of Biology, University of Fribourg, Chemin du Musee 10, 1700, Fribourg, Switzerland.
  • Cornelis S; Department of Biology, University of Fribourg, Chemin du Musee 10, 1700, Fribourg, Switzerland.
  • Hazak O; Department of Biology, University of Fribourg, Chemin du Musee 10, 1700, Fribourg, Switzerland. ora.hazak@unifr.ch.
Commun Biol ; 6(1): 588, 2023 06 06.
Article em En | MEDLINE | ID: mdl-37280369
ABSTRACT
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.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Proteínas de Arabidopsis Tipo de estudo: Prognostic_studies Idioma: En Revista: Commun Biol Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Proteínas de Arabidopsis Tipo de estudo: Prognostic_studies Idioma: En Revista: Commun Biol Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Suíça