Silencing the alarm: an insect salivary enzyme closes plant stomata and inhibits volatile release.
HIPV
effector
insect herbivore
plant defense
stomata
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
04 2021
04 2021
Historique:
received:
26
10
2020
accepted:
17
12
2020
pubmed:
19
1
2021
medline:
15
5
2021
entrez:
18
1
2021
Statut:
ppublish
Résumé
Herbivore-induced plant volatiles (HIPVs) are widely recognized as an ecologically important defensive response of plants against herbivory. Although the induction of this 'cry for help' has been well documented, only a few studies have investigated the inhibition of HIPVs by herbivores and little is known about whether herbivores have evolved mechanisms to inhibit the release of HIPVs. To examine the role of herbivore effectors in modulating HIPVs and stomatal dynamics, we conducted series of experiments combining pharmacological, surgical, genetic (CRISPR-Cas9) and chemical (GC-MS analysis) approaches. We show that the salivary enzyme, glucose oxidase (GOX), secreted by the caterpillar Helicoverpa zea on leaves, causes stomatal closure in tomato (Solanum lycopersicum) within 5 min, and in both tomato and soybean (Glycine max) for at least 48 h. GOX also inhibits the emission of several HIPVs during feeding by H. zea, including (Z)-3-hexenol, (Z)-jasmone and (Z)-3-hexenyl acetate, which are important airborne signals in plant defenses. Our findings highlight a potential adaptive strategy where an insect herbivore inhibits plant airborne defenses during feeding by exploiting the association between stomatal dynamics and HIPV emission.
Identifiants
pubmed: 33459359
doi: 10.1111/nph.17214
pmc: PMC8048682
doi:
Substances chimiques
Volatile Organic Compounds
0
Banques de données
Dryad
['10.5061/dryad.q573n5tgj']
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
793-803Informations de copyright
© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.
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