Uncoupling root hair formation and defence activation from growth inhibition in response to damage-associated Pep peptides in Arabidopsis thaliana

© 2020 The Authors New Phytologist © 2020 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 229(2021), 5 vom: 31. März, Seite 2844-2858
1. Verfasser: Okada, Kentaro (VerfasserIn)
Weitere Verfasser: Kubota, Yuki, Hirase, Taishi, Otani, Koichi, Goh, Tatsuaki, Hiruma, Kei, Saijo, Yusuke
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't cell type damage natural variations peptide hormone rhizosphere root immunity Arabidopsis Proteins Indoleacetic Acids mehr... Peptides Receptors, Cell Surface BIK1 protein, Arabidopsis EC 2.7.11.1 Protein Serine-Threonine Kinases
Beschreibung
Zusammenfassung:© 2020 The Authors New Phytologist © 2020 New Phytologist Foundation.
In Arabidopsis thaliana, PROPEPs and their derived elicitor-active Pep epitopes provide damage-associated molecular patterns (DAMPs), which trigger defence responses through cell-surface receptors PEPR1 and PEPR2. In addition, Pep peptides induce root growth inhibition and root hair formation, however their relationships and coordinating mechanisms are poorly understood. Here, we reveal that Pep1-mediated root hair formation requires PEPR-associated kinases BAK1/BKK1 and BIK1/PBL1, ethylene, auxin and root hair differentiation regulators, in addition to PEPR2. Our analysis on 69 accessions unravels intraspecies variations in Pep1-induced root hair formation and growth inhibition. The absence of a positive correlation between the two traits suggests their separate regulation and diversification in natural populations of A. thaliana. Restricted PEPR2 expression to certain root tissues is sufficient to induce root hair formation and growth inhibition in response to Pep1, indicating the capacity of non-cell-autonomous receptor signalling in different root tissues. Of particular note, root hair cell-specific PEPR2 expression uncouples defence activation from root growth inhibition and root hair formation, suggesting a unique property of root hairs in root defence activation following Pep1 recognition
Beschreibung:Date Completed 14.05.2021
Date Revised 04.12.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.17064