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Fungal Symbionts of the Spruce Bark Beetle Synthesize the Beetle Aggregation Pheromone 2-Methyl-3-buten-2-ol

Journal of chemical ecology, 2015-09, Vol.41 (9), p.848-852 [Peer Reviewed Journal]

Springer Science+Business Media New York 2015 ;ISSN: 0098-0331 ;ISSN: 1573-1561 ;EISSN: 1573-1561 ;DOI: 10.1007/s10886-015-0617-3 ;PMID: 26302987

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Title:
Fungal Symbionts of the Spruce Bark Beetle Synthesize the Beetle Aggregation Pheromone 2-Methyl-3-buten-2-ol
Author: Zhao, Tao ; Axelsson, Karolin ; Krokene, Paal ; Borg-Karlson, Anna-Karin
Subjects: aggregation behavior ; aggregation pheromones ; Agriculture ; Animals ; bark ; Bark beetle ; bark beetles ; Biochemistry ; Biologi med ekologisk inriktning ; Biological Microscopy ; Biomedical and Life Sciences ; Bluestain fungi ; carbon ; Chemical ecology ; coevolution ; Coleoptera - microbiology ; Ecology ; Entomology ; Fungal symbiont ; Fungi ; Fungi - physiology ; glucose ; Grosmannia ; headspace analysis ; Insects ; Ips typographus ; Life Sciences ; Pentanols - metabolism ; pheromone ; Pheromones ; Pheromones - metabolism ; Picea - microbiology ; Picea - parasitology ; Picea abies ; Plant Bark - microbiology ; Plant Bark - parasitology ; Plant-insect-microbe interactions ; Rapid Communication ; Scolytinae ; solid phase microextraction ; stable isotopes ; symbionts ; Symbiosis ; trees
Is Part Of: Journal of chemical ecology, 2015-09, Vol.41 (9), p.848-852
Description: Tree-killing bark beetles depend on aggregation pheromones to mass-attack their host trees and overwhelm their resistance. The beetles are always associated with phytopathogenic ophiostomatoid fungi that probably assist in breaking down tree resistance, but little is known about if or how much these fungal symbionts contribute to the beetles’ aggregation behavior. In this study, we determined the ability of four major fungal symbionts of the spruce bark beetle Ips typographus to produce beetle aggregation pheromones. The fungi were incubated on Norway spruce Picea abies bark, malt agar, or malt agar amended with 0.5 % ¹³C glucose. Volatiles present in the headspace of each fungus were analyzed for 7 days after incubation using a SPME autosampler coupled to a GC/MS. Two Grosmannia species (G. penicillata and G. europhioides) produced large amounts of 2-methyl-3-buten-2-ol (MB), the major component in the beetles’ aggregation pheromone blend, when growing on spruce bark or malt agar. Grosmannia europhioides also incorporated ¹³C glucose into MB, demonstrating that the fungi can synthesize MB de novo using glucose as a carbon source. This is the first clear evidence that fungal symbionts of bark beetles can produce components in the aggregation pheromone blend of their beetle vectors. This provides new insight into the possible ecological roles of fungal symbionts in bark beetle systems and may deepen our understanding of species interactions and coevolution in these important biological systems.
Publisher: New York: Springer US
Language: English;Swedish
Identifier: ISSN: 0098-0331
ISSN: 1573-1561
EISSN: 1573-1561
DOI: 10.1007/s10886-015-0617-3
PMID: 26302987
Source: AUTh Library subscriptions: ProQuest Central
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Fungal Symbionts of the Spruce Bark Beetle Synthesize the Beetle Aggregation Pheromone 2-Methyl-3-buten-2-ol

Springer Science+Business Media New York 2015 ;ISSN: 0098-0331 ;ISSN: 1573-1561 ;EISSN: 1573-1561 ;DOI: 10.1007/s10886-015-0617-3 ;PMID: 26302987

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