Signalling of Arabidopsis thaliana response to Pieris brassicae eggs shares similarities with PAMP-triggered immunity.

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Serval ID
serval:BIB_3CF3C44E6E73
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Signalling of Arabidopsis thaliana response to Pieris brassicae eggs shares similarities with PAMP-triggered immunity.
Journal
Journal of Experimental Botany
Author(s)
Gouhier-Darimont C., Schmiesing A., Bonnet C., Lassueur S., Reymond P.
ISSN
1460-2431 (Electronic)
ISSN-L
0022-0957
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
64
Number
2
Pages
665-674
Language
english
Abstract
Insect egg deposition activates plant defence, but very little is known about signalling events that control this response. In Arabidopsis thaliana, oviposition by Pieris brassicae triggers salicylic acid (SA) accumulation and induces the expression of defence genes. This is similar to the recognition of pathogen-associated molecular patterns (PAMPs), which are involved in PAMP-triggered immunity (PTI). Here, the involvement of known signalling components of PTI in response to oviposition was studied. Treatment with P. brassicae egg extract caused a rapid induction of early PAMP-responsive genes. In addition, expression of the defence gene PR-1 required EDS1, SID2, and, partially, NPR1, thus implicating the SA pathway downstream of egg recognition. PR-1 expression was triggered by a non-polar fraction of egg extract and by an oxidative burst modulated through the antagonistic action of EDS1 and NUDT7, but which did not depend on the NADPH oxidases RBOHD and RBOHF. Searching for receptors of egg-derived elicitors, a receptor-like kinase mutant, lecRK-I.8, was identified which shows a much reduced induction of PR-1 in response to egg extract treatment. These results demonstrate the importance of the SA pathway in response to egg-derived elicitor(s) and unravel intriguing similarities between the detection of insect eggs and PTI in Arabidopsis.
Keywords
Arabidopsis thaliana, oviposition, PAMP-triggered immunity, Pieris brassicae, PR-1 expression, SA pathway
Pubmed
Web of science
Open Access
Yes
Create date
17/01/2013 16:23
Last modification date
20/08/2019 13:33
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