Roots drive oligogalacturonide-induced systemic immunity in tomato.
Botrytis cinerea
DAMPs
alkaloids
flavonoids
metabolomics
phytohormones
plant defences
systemic resistance
Journal
Plant, cell & environment
ISSN: 1365-3040
Titre abrégé: Plant Cell Environ
Pays: United States
ID NLM: 9309004
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
29
05
2020
revised:
06
10
2020
accepted:
13
10
2020
pubmed:
19
10
2020
medline:
9
6
2021
entrez:
18
10
2020
Statut:
ppublish
Résumé
Oligogalacturonides (OGs) are fragments of pectin released from the plant cell wall during insect or pathogen attack. They can be perceived by the plant as damage signals, triggering local and systemic defence responses. Here, we analyse the dynamics of local and systemic responses to OG perception in tomato roots or shoots, exploring their impact across the plant and their relevance in pathogen resistance. Targeted and untargeted metabolomics and gene expression analysis in plants treated with purified OGs revealed that local responses were transient, while distal responses were stronger and more sustained. Remarkably, changes were more conspicuous in roots, even upon foliar application of the OGs. The treatments differentially activated the synthesis of defence-related hormones and secondary metabolites including flavonoids, alkaloids and lignans, some of them exclusively synthetized in roots. Finally, the biological relevance of the systemic defence responses activated upon OG perception was confirmed, as the treatment induced systemic resistance to Botrytis cinerea. Overall, this study shows the differential regulation of tomato defences upon OGs perception in roots and shoots and reveals the key role of roots in the coordination of the plant responses to damage sensing.
Identifiants
pubmed: 33070347
doi: 10.1111/pce.13917
pmc: PMC7883634
doi:
Substances chimiques
Plant Growth Regulators
0
Pectins
89NA02M4RX
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
275-289Informations de copyright
© 2020 John Wiley & Sons Ltd.
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