Priming of Arabidopsis resistance to herbivory by insect egg deposition depends on the plant's developmental stage.
herbivory
insect eggs
larval feeding
plant ontogeny
plant resistance
plant tolerance
priming
salicylic acid
seed yield
transcriptome
Journal
Journal of experimental botany
ISSN: 1460-2431
Titre abrégé: J Exp Bot
Pays: England
ID NLM: 9882906
Informations de publication
Date de publication:
11 08 2022
11 08 2022
Historique:
received:
16
02
2022
accepted:
05
05
2022
pubmed:
7
5
2022
medline:
13
8
2022
entrez:
6
5
2022
Statut:
ppublish
Résumé
While traits of plant resistance to herbivory often change during ontogeny, it is unknown whether the primability of this resistance depends on the plant's developmental stage. Resistance in non-flowering Arabidopsis thaliana against Pieris brassicae larvae is known to be primable by prior egg deposition on leaves. We investigated whether this priming effect is maintained in plants at the flowering stage. Larval performance assays revealed that flowering plants' resistance to herbivory was not primable by egg deposition. Accordingly, transcriptomes of flowering plants showed almost no response to eggs. In contrast, egg deposition on non-flowering plants enhanced the expression of genes induced by subsequent larval feeding. Strikingly, flowering plants showed constitutively high expression levels of these genes. Larvae performed generally worse on flowering than on non-flowering plants, indicating that flowering plants constitutively resist herbivory. Furthermore, we determined the seed weight in regrown plants that had been exposed to eggs and larvae during the non-flowering or flowering stage. Non-flowering plants benefitted from egg priming with a smaller loss in seed yield. The seed yield of flowering plants was unaffected by the treatments, indicating tolerance towards the larvae. Our results show that the primability of anti-herbivore defences in Arabidopsis depends on the plant's developmental stage.
Identifiants
pubmed: 35522985
pii: 6582013
doi: 10.1093/jxb/erac199
pmc: PMC9366327
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
4996-5015Subventions
Organisme : German Research Foundation
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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