Osmoelectric siphon models for signal and water dispersal in wounded plants.

Détails

ID Serval
serval:BIB_E9E00978C433
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Osmoelectric siphon models for signal and water dispersal in wounded plants.
Périodique
Journal of experimental botany
Auteur⸱e⸱s
Gao Y.Q., Farmer E.E.
ISSN
1460-2431 (Electronic)
ISSN-L
0022-0957
Statut éditorial
Publié
Date de publication
13/02/2023
Peer-reviewed
Oui
Volume
74
Numéro
4
Pages
1207-1220
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
When attacked by herbivores, plants produce electrical signals which can activate the synthesis of the defense mediator jasmonate. These wound-induced membrane potential changes can occur in response to elicitors that are released from damaged plant cells. We list plant-derived elicitors of membrane depolarization. These compounds include the amino acid l-glutamate (Glu), a potential ligand for GLUTAMATE RECEPTOR-LIKE (GLR) proteins that play roles in herbivore-activated electrical signaling. How are membrane depolarization elicitors dispersed in wounded plants? In analogy with widespread turgor-driven cell and organ movements, we propose osmoelectric siphon mechanisms for elicitor transport. These mechanisms are based on membrane depolarization leading to cell water shedding into the apoplast followed by membrane repolarization and water uptake. We discuss two related mechanisms likely to occur in response to small wounds and large wounds that trigger leaf-to-leaf electrical signal propagation. To reduce jasmonate pathway activation, a feeding insect must cut through tissues cleanly. If their mandibles become worn, the herbivore is converted into a robust plant defense activator. Our models may therefore help to explain why numerous plants produce abrasives which can blunt herbivore mouthparts. Finally, if verified, the models we propose may be generalizable for cell to cell transport of water and pathogen-derived regulators.
Mots-clé
Water/metabolism, Plants/metabolism, Oxylipins/metabolism, Cyclopentanes/metabolism, Herbivory, DAMP, PAMP, drought, electrical signal, elicitor, insect, jasmonate, mandibles, turgor, water potential
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/02/2023 13:02
Dernière modification de la notice
16/11/2023 8:09
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