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Fungal associates of the tree-killing bark beetle, Ips typographus, vary in virulence, ability to degree conifer phenolics and influence bark beetle behavior
Swedish University of Agricultural Sciences. (Ecological Chemistry)
Max Planck Institute for Chemical Ecology, Germany.
Norwegian Institute of Bioeconomy Research, Norway.
Max Planck Institute for Chemical Ecology, Germany.
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2018 (English)In: Fungal ecology, ISSN 1754-5048, E-ISSN 1878-0083Article in journal (Refereed) Accepted
Abstract [en]

The bark beetle Ips typographus carries numerous fungi that could be assisting the beetle in colonizing live Norway spruce (Picea abies) trees. Phenolic defenses in spruce phloem are degraded by the beetleā€™s major tree-killing fungus Endoconidiophora polonica, but it is unknown if other beetle associates can also catabolize tree defenses. We compared the ability of five fungi commonly associated with I. typographus to degrade phenolic compounds in Norway spruce phloem. In addition to E. polonica, Grosmannia penicillata and G. europhioides were also able to degrade stilbenes and flavonoids and grow on minimal growth medium with spruce bark constituents as the only nutrients. Although beetles avoided medium amended with phenolics, they preferred medium colonized by E. polonica and O. bicolor with intermediate phenolic degradation ability, over medium colonized by the Grosmannia species, which had the highest degradation ability of the tested species, underlining the complexity of beetle-fungus interactions.

Place, publisher, year, edition, pages
Elsevier, 2018.
Keywords [en]
Ips typographus, fungal symbionts, Endoconidiophora, Grosmannia, Ophiostoma, phenolic defenses, detoxification, complementary roles
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-71864OAI: oai:DiVA.org:lnu-71864DiVA, id: diva2:1193730
Available from: 2018-03-27 Created: 2018-03-27 Last updated: 2018-05-11

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Zhao, Tao

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