Insect oral secretions suppress wound-induced responses in Arabidopsis

Consales, F., Schweizer, F., Erb, M., Gouhier-Darimont, C., Bodenhausen, N., Bruessow, F., Sobhy, I. ORCID: https://orcid.org/0000-0003-4984-1823 and Reymond, P. 2012. Insect oral secretions suppress wound-induced responses in Arabidopsis. Journal of Experimental Botany 63 (2) , pp. 727-737. 10.1093/jxb/err308

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Abstract

The induction of plant defences and their subsequent suppression by insects is thought to be an important factor in the evolutionary arms race between plants and herbivores. Although insect oral secretions (OS) contain elicitors that trigger plant immunity, little is known about the suppressors of plant defences. The Arabidopsis thaliana transcriptome was analysed in response to wounding and OS treatment. The expression of several wound-inducible genes was suppressed after the application of OS from two lepidopteran herbivores, Pieris brassicae and Spodoptera littoralis. This inhibition was correlated with enhanced S. littoralis larval growth, pointing to an effective role of insect OS in suppressing plant defences. Two genes, an ERF/AP2 transcription factor and a proteinase inhibitor, were then studied in more detail. OS-induced suppression lasted for at least 48 h, was independent of the jasmonate or salicylate pathways, and was not due to known elicitors. Interestingly, insect OS attenuated leaf water loss, suggesting that insects have evolved mechanisms to interfere with the induction of water-stress-related defences.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences
Publisher:	Oxford University Press
ISSN:	1460-2431
Date of First Compliant Deposit:	12 May 2022
Last Modified:	24 May 2023 16:46
URI:	https://orca.cardiff.ac.uk/id/eprint/147655

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