Monday, 18 November 2002
D0191

This presentation is part of : Display Presentations, Subsection Cc. Insect Vectors in Relation to Plant Disease

Induction of volatile organic compounds from potato leafroll virus-infected potato plants that attract the virus vector Myzus persicae

Sanford D. Eigenbrode, Philip H. Berger, Hongjian Ding, Jim H. Lorenzen, and Analiz Rodriguez. University of Idaho, Department of Plant, Soil, and Entomological Sciences, Moscow, ID

An increase in the production of volatile organic compounds (VOC) is induced in potato plants infected with the PLRV virus. These induced volatiles are attractive or arrestant for Myzus persicae, the principal vector of this virus. This increase in VOC is associated with changes in the expression of genes that are hallmarks of the known induction pathways in plants. The VOC induced include a subset of those induced by mechanical wounding or treating the plants with methyl jasmonate, and green leaf volatiles associated with pathogen infection. Among the released volatiles, (E)-2-hexen-1-ol and alpha-humulene have notably higher electrophysiological activity based on EAG with M. persicae. In bioassay, (E)-2-hexen-1-ol is an arrestant and the humulene is a repellent for the aphid. However, the sum of the effects of these volatiles cannot explain aphid response to the entire VOC blend.

Species 1: Homoptera Aphididae Myzus persicae (green peach aphid)
Keywords: PLRV, semiochemicals

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