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Volatiles from a Mite-Infested Spruce Clone and Their Effects on Pine Weevil Behavior
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. (Ecological Chemistry Group)
Department of Ecology, Swedish University of Agricultural Sciences.
Department of Ecology, Swedish University of Agricultural Sciences.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. (Ecological Chemistry Group)
2009 (Engelska)Ingår i: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 35, nr 10, s. 1262-1271Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Induced responses by Norway spruce (Picea abies) seedlings to feeding damage by two mite species were studied by analyzing the volatiles emitted during infestation. Four specimens of a Norway spruce (Picea abies L.) clone were infested with mites of Nalepella sp., another four with Oligonychus ununguis, and four were kept mite-free as controls. After a year of infestation, spruce volatiles were collected, analyzed, and identified using SPME-GC-MS. In addition, enantiomers of chiral limonene and linalool were separated by two-dimensional GC. Methyl salicylate (MeSA), (-)-linalool, (E)-beta-farnesene, and (E,E)-alpha-farnesene were the main volatiles induced by both species of mites, albeit in different proportions. The ability of the main compounds emitted by the mite-infested spruces to attract or repel the pine weevil, Hylobius abietis (L.), was tested. (E)-beta-farnesene was found to be attractive in the absence of spruce odor, whereas methyl salicylate had a deterrent effect in combination with attractive spruce odor. The other tested compounds had no significant effects on the behavior of the weevils.

Ort, förlag, år, upplaga, sidor
2009. Vol. 35, nr 10, s. 1262-1271
Nyckelord [en]
Acari; Hylobius abietis; Nalepella sp.; Oligonychus ununguis; Picea abies; Norway spruce; Linalool; Farnesene; Methyl salicylate; Sesquiterpenes-
Nationell ämneskategori
Organisk kemi
Identifikatorer
URN: urn:nbn:se:kth:diva-18977DOI: 10.1007/s10886-009-9708-3ISI: 000272034300013Scopus ID: 2-s2.0-76149130370OAI: oai:DiVA.org:kth-18977DiVA, id: diva2:337024
Anmärkning
QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. Volatiles of Conifer Seedlings: Compositions and Resistance Markers
Öppna denna publikation i ny flik eller fönster >>Volatiles of Conifer Seedlings: Compositions and Resistance Markers
2008 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Pine weevils cause major damage to newly planted conifer seedlings in reforestation areas. However, recent findings indicate that small (“mini”) seedlings, planted at the age of 7-10 weeks, are gnawed less by pine weevils than the larger, conventionally planted seedlings. Thus, it has been proposed that planting young conifer seedlings in clear-cut areas may reduce the damage caused by pine weevils. In attempts to determine why mini seedlings appear to be less damaged by pine weevils than “conventional” seedlings, the volatiles released by Norway spruce and Scots pine mini seedlings were investigated, since such chemicals are of great importance in herbivore-plant communication, inter alia acting as repellents, attractants or antifeedants.

Volatiles from the seedlings were collected, separated and identified by solid phase microextraction (SPME) followed by gas chromatography-mass spectrometry.

The results show that there are high levels of chemodiversity among both spruce and pine seedlings. Between-tissue and age-related variations in their emissions were also found.

Norway spruce clones infested by mites were also examined to assess genotype- and pest-specific stress reactions of Norway spruce. Finally, the effects of certain spruce defense compounds on the behavior of the large pine weevil Hylobius abietis were examined.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2008. s. 51
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2008:34
Nyckelord
Conifers, Norway spruce, Scots pine, Nalepella, Oligonychus ununguis, green leaf volatiles, terpenes, aromatics, benzenoids, SPME, induced defense reaction
Nationell ämneskategori
Organisk kemi
Identifikatorer
urn:nbn:se:kth:diva-4723 (URN)978-91-7178-962-4 (ISBN)
Disputation
2008-05-19, F3, Lindstedtsvägen 26, Stockholm, 10:00
Opponent
Handledare
Anmärkning
QC 20100818Tillgänglig från: 2008-05-06 Skapad: 2008-05-06 Senast uppdaterad: 2010-08-18Bibliografiskt granskad

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