Journal Article

Investigations into plant biochemical wound-response pathways involved in the production of aphid-induced plant volatiles

Robbie D. Girling, Rachael Madison, Mark Hassall, Guy M. Poppy and John G. Turner

in Journal of Experimental Botany

Published on behalf of Society for Experimental Biology

Volume 59, issue 11, pages 3077-3085
Published in print August 2008 | ISSN: 0022-0957
Published online June 2008 | e-ISSN: 1460-2431 | DOI: http://dx.doi.org/10.1093/jxb/ern163
Investigations into plant biochemical wound-response pathways involved in the production of aphid-induced plant volatiles

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Feeding damage to plants by insect herbivores induces the production of plant volatiles, which are attractive to the herbivores natural enemies. Little is understood about the plant biochemical pathways involved in aphid-induced plant volatile production. The aphid parasitoid Diaeretiella rapae can detect and respond to aphid-induced volatiles produced by Arabidopsis thaliana. When given experience of those volatiles, it can learn those cues and can therefore be used as a novel biosensor to detect them. The pathways involved in aphid-induced volatile production were investigated by comparing the responses of D. rapae to volatiles from a number of different transgenic mutants of A. thaliana, mutated in their octadecanoid, ethylene or salicylic acid wound-response pathways and also from wild-type plants. Plants were either undamaged or infested by the peach-potato aphid, Myzus persicae. It is demonstrated that the octadecanoid pathway and specifically the COI1 gene are required for aphid-induced volatile production. The presence of salicylic acid is also involved in volatile production. Using this model system, in combination with A. thaliana plants with single point gene mutations, has potential for the precise dissection of biochemical pathways involved in the production of aphid-induced volatiles.

Keywords: cev-1; coi1-16; Col-gl; NahG; npr-1; semiochemical; tritrophic interaction; Y-tube olfactometer

Journal Article.  5926 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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