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Infestation by a Nalepella species induces emissions of alpha- and beta-farnesenes, (-)- linalool and aromatic compounds in Norway spruce clones of different susceptibility to the large pine weevil
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. (Ecological Chemistry Group)
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. (Ecological Chemistry Group)
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi. (Ecological Chemistry Group)
2008 (Engelska)Ingår i: Arthropod-Plant Interactions, ISSN 1872-8855, Vol. 2, nr 1, s. 31-41Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The emissions of spruce grafts (Picea abies), caused by infestation of an acarid species of the genus Nalepella were investigated. Volatiles of three clones, both healthy and infested, with different susceptibility to the large pine weevil Hylobius abietis were collected by solid phase micro extraction (SPME) and analyzed by gas chromatograph coupled to mass-spectrometry (GC-MS). In addition, enantiomers of the main chiral compounds were separated by a two dimensional-gas chromatograph (2D-GC). In the characteristic flower-like fragrances emitted by the infested grafts large amounts of E-beta-farnesene, E, E-alpha-farnesene, (-)-linalool, methyl salicylate and minute amounts of benzyl alcohol, E-anethole, methyl benzoate, neral and geranial were found. All together, these compounds could explain the characteristic scent emitted by the infested seedlings. Large differences in the emissions of E-beta-farnesene, E, E-alpha-farnesene and methyl salicylate were found between but not within the clones.

Ort, förlag, år, upplaga, sidor
2008. Vol. 2, nr 1, s. 31-41
Nyckelord [en]
Nalepella; Picea; Infestation; Farnesene; Methyl salicylate; Linalool; Neral; Stress
Nationell ämneskategori
Organisk kemi
Identifikatorer
URN: urn:nbn:se:kth:diva-17983DOI: 10.1007/s11829-008-9029-4ISI: 000260961100004Scopus ID: 2-s2.0-41149104564OAI: oai:DiVA.org:kth-17983DiVA, id: diva2:336028
Anmärkning
QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2010-08-18Bibliografiskt 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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Kännaste, AstridVongvanich, NamphungBorg-Karlson, Anna-Karin
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Totalt: 56 träffar
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