Mechanosensitive ion channels contribute to mechanically evoked rapid leaflet movement in Mimosa pudica.
Journal
Plant physiology
ISSN: 1532-2548
Titre abrégé: Plant Physiol
Pays: United States
ID NLM: 0401224
Informations de publication
Date de publication:
03 11 2021
03 11 2021
Historique:
accepted:
26
05
2021
received:
16
03
2021
entrez:
4
11
2021
pubmed:
5
11
2021
medline:
26
2
2022
Statut:
ppublish
Résumé
Mechanoperception, the ability to perceive and respond to mechanical stimuli, is a common and fundamental property of all forms of life. Vascular plants such as Mimosa pudica use this function to protect themselves against herbivory. The mechanical stimulus caused by a landing insect triggers a rapid closing of the leaflets that drives the potential pest away. While this thigmonastic movement is caused by ion fluxes accompanied by a rapid change of volume in the pulvini, the mechanism responsible for the detection of the mechanical stimulus remains poorly understood. Here, we examined the role of mechanosensitive ion channels in the first step of this evolutionarily conserved defense mechanism: the mechanically evoked closing of the leaflet. Our results demonstrate that the key site of mechanosensation in the Mimosa leaflets is the pulvinule, which expresses a stretch-activated chloride-permeable mechanosensitive ion channel. Blocking these channels partially prevents the closure of the leaflets following mechanical stimulation. These results demonstrate a direct relation between the activity of mechanosensitive ion channels and a central defense mechanism of M. pudica.
Identifiants
pubmed: 34734277
pii: 6347591
doi: 10.1093/plphys/kiab333
pmc: PMC8566232
doi:
Substances chimiques
Ion Channels
0
Plant Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1704-1712Informations de copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of American Society of Plant Biologists.
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