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Constitutive emission of the aphid alarm pheromone, ( E )-β-farnesene, from plants does not serve as a direct defense against aphids by Grit Kunert; Carolina Reinhold; Jonathan Gershenzon is a Environmental Science article available to read on EtoBox.

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## Background The sesquiterpene, (__E__)-β-farnesene (EBF), is the principal component of the alarm pheromone of many aphid species. Released when aphids are attacked by enemies, EBF leads aphids to undertake predator avoidance behaviors and to produce more winged offspring that can leave the plant. Many plants also release EBF as a volatile, and so it has been proposed that this compound could act to defend plants against aphid infestation by 1) deterring aphids from settling, 2) reducing aphid performance due to frequent interruption of feeding and 3) inducing the production of more winged offspring. Here we tested the costs and benefits of EBF as a defense against the green peach aphid, __Myzus persicae__, using transgenic __Arabidopsis thaliana__ lines engineered to continuously emit EBF. ## Results No metabolic costs of EBF synthesis could be detected in these plants as they showed no differences in growth or seed production from wild-type controls under two fertilizer regimes. Likewise, no evidence was found for the ability of EBF to directly defend the plant against aphids. EBF emission did not significantly repel winged or wingless morphs from settling on plants. Nor did EB

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Author

Grit Kunert; Carolina Reinhold; Jonathan Gershenzon

Publisher

BioMed Central; Springer (Biomed Central Ltd.); London: BioMed Central, 2001-; Springer Science and Business Media LLC (ISSN 1472-6785)

Published

2010

Language

EN

Field

Environmental Science (Physical Sciences)