Distinct immune sensor systems for fungal endopolygalacturonases in closely related Brassicaceae.
Journal
Nature plants
ISSN: 2055-0278
Titre abrégé: Nat Plants
Pays: England
ID NLM: 101651677
Informations de publication
Date de publication:
09 2021
09 2021
Historique:
received:
21
12
2020
accepted:
07
07
2021
pubmed:
31
7
2021
medline:
12
10
2021
entrez:
30
7
2021
Statut:
ppublish
Résumé
Plant pattern recognition receptors (PRRs) facilitate recognition of microbial patterns and mediate activation of plant immunity. Arabidopsis thaliana RLP42 senses fungal endopolygalacturonases (PGs) and triggers plant defence through complex formation with SOBIR1 and SERK co-receptors. Here, we show that a conserved 9-amino-acid fragment pg9(At) within PGs is sufficient to activate RLP42-dependent plant immunity. Structure-function analysis reveals essential roles of amino acid residues within the RLP42 leucine-rich repeat and island domains for ligand binding and PRR complex assembly. Sensitivity to pg9(At), which is restricted to A. thaliana and exhibits scattered accession specificity, is unusual for known PRRs. Arabidopsis arenosa and Brassica rapa, two Brassicaceae species closely related to A. thaliana, respectively perceive immunogenic PG fragments pg20(Aa) and pg36(Bra), which are structurally distinct from pg9(At). Our study provides evidence for rapid evolution of polymorphic PG sensors with distinct pattern specificities within a single plant family.
Identifiants
pubmed: 34326531
doi: 10.1038/s41477-021-00982-2
pii: 10.1038/s41477-021-00982-2
doi:
Substances chimiques
Polygalacturonase
EC 3.2.1.15
Types de publication
Comparative Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1254-1263Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer Nature Limited.
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