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Abstract

Volatile interactions between unattacked plants can lead to changes in their volatile emissions. Exposure of potato plants to onion plant volatiles results in increased emission of 2 terpenoids, (E)-nerolidol and TMTT. We investigated whether this is detectable by the ladybird Coccinella septempunctata. The odor of onion-exposed potato was significantly more attractive to ladybirds than that of unexposed potato. Further, a synthetic blend mimicking the volatile profile of onion-exposed potato was more attractive than a blend mimicking that of unexposed potato. When presented individually, TMTT was attractive to ladybirds whereas (E)-nerolidol was repellent. Volatile exchange between unattacked plants and the consequent increased attractiveness for ladybirds may be a mechanism that contributes to the increased abundance of natural enemies in complex plant habitats.

Keywords

plant–plant communication; aphids; potato; onion; volatiles; (E)-nerolidol; TMTT; ladybird; Coccinella septempunctata; natural enemies

Published in

Plant Signaling and Behavior
2014, volume: 9, number: 8, article number: e29517

SLU Authors

UKÄ Subject classification

Ecology
Zoology
Botany

Publication identifier

  • DOI: https://doi.org/10.4161/psb.29517

Permanent link to this page (URI)

https://res.slu.se/id/publ/66064