Journal
ARTHROPOD-PLANT INTERACTIONS
Volume 8, Issue 4, Pages 305-316Publisher
SPRINGER
DOI: 10.1007/s11829-014-9310-7
Keywords
Ips typographus; Picea abies; Host selection; Semiochemicals; GC-EAD; GC9GC/TOFMS
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Funding
- Academy of Sciences of the Czech Republic [RVO: 61388963]
- [FRVS 2954/G4]
- [CIGA CZU 3109]
- [NAZV QH81136]
- [MA CR 0002070203]
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In the search for compounds that contribute to the host or habitat discrimination, antennae of Ips typographus were screened for sensitivity to volatiles released by spruce trap-trees using gas chromatography linked to electroantennography. The antennally active compounds were determined using comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometric detection. Data show that I. typographus antennae respond to compounds emitted by the host. In total, 18 of antennally active compounds were detected: alpha-pinene, camphene, sabinene, beta-pinene, myrcene, Delta-3-carene, p-cymene, limonene, beta-phellandrene, 1,8-cineole, gamma-terpinene, terpinolene, nonanal, camphor, trans-pinocamphone, cis-pinocamphone, terpinen-4-ol, and verbenone. Unequivocal identification of all active minor compounds is provided and confirmed using synthetic standards. Compounds in minor quantities like 1,8-cineole, beta-phellandrene, camphor, cis-pinocamphone, and trans-pinocamphone were more active than major spruce monoterpenes. We hypothesize that the minor spruce compounds may play so far unrecognized role in conveying information about host suitability for I. typographus.
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