Herbivory in the previous generation primes plants for enhanced insect resistance.

Détails

ID Serval
serval:BIB_CA19BD941355
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Herbivory in the previous generation primes plants for enhanced insect resistance.
Périodique
Plant Physiology
Auteur(s)
Rasmann S., De Vos M., Casteel C.L., Tian D., Halitschke R., Sun J.Y., Agrawal A.A., Felton G.W., Jander G.
ISSN
1532-2548 (Electronic)
ISSN-L
0032-0889
Statut éditorial
Publié
Date de publication
2012
Volume
158
Numéro
2
Pages
854-863
Langue
anglais
Résumé
Inducible defenses, which provide enhanced resistance after initial attack, are nearly universal in plants. This defense signaling cascade is mediated by the synthesis, movement, and perception of jasmonic acid and related plant metabolites. To characterize the long-term persistence of plant immunity, we challenged Arabidopsis (Arabidopsis thaliana) and tomato (Solanum lycopersicum) with caterpillar herbivory, application of methyl jasmonate, or mechanical damage during vegetative growth and assessed plant resistance in subsequent generations. Here, we show that induced resistance was associated with transgenerational priming of jasmonic acid-dependent defense responses in both species, caused caterpillars to grow up to 50% smaller than on control plants, and persisted for two generations in Arabidopsis. Arabidopsis mutants that are deficient in jasmonate perception (coronatine insensitive1) or in the biogenesis of small interfering RNA (dicer-like2 dicer-like3 dicer-like4 and nuclear RNA polymerase d2a nuclear RNA polymerase d2b) do not exhibit inherited resistance. The observation of inherited resistance in both the Brassicaceae and Solanaceae suggests that this trait may be more widely distributed in plants. Epigenetic resistance to herbivory thus represents a phenotypically plastic mechanism for enhanced defense across generations.
Mots-clé
Acetates/metabolism, Animals, Cyclopentanes/metabolism, Feeding Behavior, Insects/physiology, Oxylipins/metabolism, Plants/genetics, Plants/parasitology, RNA, Small Interfering/genetics
Pubmed
Web of science
Open Access
Oui
Création de la notice
01/03/2012 19:30
Dernière modification de la notice
09/05/2019 1:13
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