Rapid alkalinization factor 22 has a structural and signalling role in root hair cell wall assembly - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nature Plants Année : 2024

Rapid alkalinization factor 22 has a structural and signalling role in root hair cell wall assembly

Sébastjen Schoenaers
Elvina Faucher
José Feijó
Herman Höfte
Kris Vissenberg

Résumé

Pressurized cells with strong walls make up the hydrostatic skeleton of plants. Assembly and expansion of such stressed walls depend on a family of secreted RAPID ALKALINIZATION FACTOR (RALF) peptides, which bind both a membrane receptor complex and wall-localized LEUCINE-RICH REPEAT EXTENSIN (LRXs) in a mutually exclusive way. Here we show that, in root hairs, the RALF22 peptide has a dual structural and signalling role in cell expansion. Together with LRX1, it directs the compaction of charged pectin polymers at the root hair tip into periodic circumferential rings. Free RALF22 induces the formation of a complex with LORELEI-LIKE-GPI-ANCHORED PROTEIN 1 and FERONIA, triggering adaptive cellular responses. These findings show how a peptide simultaneously functions as a structural component organizing cell wall architecture and as a feedback signalling molecule that regulates this process depending on its interaction partners. This mechanism may also underlie wall assembly and expansion in other plant cell types
Fichier principal
Vignette du fichier
schoenaers_bioRxiv.pdf (3.33 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04500803 , version 1 (12-03-2024)

Identifiants

Citer

Sébastjen Schoenaers, Hyun Kyung Lee, Martine Gonneau, Elvina Faucher, Thomas Levasseur, et al.. Rapid alkalinization factor 22 has a structural and signalling role in root hair cell wall assembly. Nature Plants, 2024, ⟨10.1038/s41477-024-01637-8⟩. ⟨hal-04500803⟩
4 Consultations
1 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More