Publication
Title
Rapid alkalinization factor 22 has a structural and signalling role in root hair cell wall assembly
Author
Abstract
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.
Language
English
Source (journal)
Nature plants. - London, 2015, currens
Publication
London : Nature Publishing Group , 2024
ISSN
2055-0278
DOI
10.1038/S41477-024-01637-8
Volume/pages
10 (2024) , p. 494-511
ISI
001188060900001
Pubmed ID
38467800
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 11.09.2024
UAntwerpen
Faculty/Department
Research group
Project info
Integrating the processes that control cell wall biomechanics during cell growth, using CrRLK1L-regulated root hair growth as a model.
ENDOPOL: endocytosis-regulated cell wall integrity sensing during polarized plant cell growth.
Interactive and intelligent cellomics platform.
Flanders BioImaging: Leading Imaging Application Integrated Service and Enablement (FBI-LIAISE).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identifier
Creation 14.03.2024
Last edited 02.04.2024
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