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Fungal associates of the tree-killing bark beetle, Ips typographus, vary in virulence, ability to degrade conifer phenolics and influence bark beetle tunneling behavior

Zhao, Tao LU ; Kandasamy, Dineshkumar LU orcid ; Krokene, Paal ; Chen, Jingyuan ; Gershenzon, Jonathan and Hammerbacher, Almuth (2019) In Fungal Ecology 38. p.71-79
Abstract

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 beetle's major tree-killing fungus Endoconidiophora polonica, but it is unknown if other beetle associates can also catabolize these compounds. We compared the ability of five fungi commonly associated with I. typographus to degrade phenolic compounds in Norway spruce phloem. Grosmannia penicillata and Grosmannia europhioides were able to degrade stilbenes and flavonoids faster than E. polonica and grow on minimal growth medium with spruce bark constituents as the only nutrients. Furthermore, beetles avoided medium amended with phenolics but... (More)

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 beetle's major tree-killing fungus Endoconidiophora polonica, but it is unknown if other beetle associates can also catabolize these compounds. We compared the ability of five fungi commonly associated with I. typographus to degrade phenolic compounds in Norway spruce phloem. Grosmannia penicillata and Grosmannia europhioides were able to degrade stilbenes and flavonoids faster than E. polonica and grow on minimal growth medium with spruce bark constituents as the only nutrients. Furthermore, beetles avoided medium amended with phenolics but marginally preferred medium colonized by fungi. Taken together our results show that different bark beetle-associated fungi have complementary roles in degrading host metabolites and thus might improve this insect's persistence in well defended host tissues.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Complementary roles, Detoxification, Endoconidiophora, Fungal symbionts, Grosmannia, Ips typographus, Ophiostoma, Phenolic defenses
in
Fungal Ecology
volume
38
pages
71 - 79
publisher
Elsevier
external identifiers
  • scopus:85050151207
ISSN
1754-5048
DOI
10.1016/j.funeco.2018.06.003
language
English
LU publication?
no
additional info
Funding Information: We thank Dr. Michael Reichelt, Bettina Raguschke and Andriy Volkov for assistance with the chemical analysis, and Prof. Anna-Karin Borg-Karlson for valuable discussion. The collaboration between TZ and AH was funded by the Deutsche Forschungsgemeinschaft (Grant HA7617/1-1 awarded to AH). Field work was funded by the Swedish Research Council Formas (Grant 229-2011-890 awarded to TZ) and the Research Council of Norway (Grant 221479/F20 awarded to PK). The chemical analyses were funded by the Max Planck Society . Publisher Copyright: © 2018 Elsevier Ltd and British Mycological Society
id
486d1ec2-f88a-4cc6-94f8-3683ddb403f8
date added to LUP
2021-12-13 11:51:35
date last changed
2022-04-27 06:33:17
@article{486d1ec2-f88a-4cc6-94f8-3683ddb403f8,
  abstract     = {{<p>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 beetle's major tree-killing fungus Endoconidiophora polonica, but it is unknown if other beetle associates can also catabolize these compounds. We compared the ability of five fungi commonly associated with I. typographus to degrade phenolic compounds in Norway spruce phloem. Grosmannia penicillata and Grosmannia europhioides were able to degrade stilbenes and flavonoids faster than E. polonica and grow on minimal growth medium with spruce bark constituents as the only nutrients. Furthermore, beetles avoided medium amended with phenolics but marginally preferred medium colonized by fungi. Taken together our results show that different bark beetle-associated fungi have complementary roles in degrading host metabolites and thus might improve this insect's persistence in well defended host tissues.</p>}},
  author       = {{Zhao, Tao and Kandasamy, Dineshkumar and Krokene, Paal and Chen, Jingyuan and Gershenzon, Jonathan and Hammerbacher, Almuth}},
  issn         = {{1754-5048}},
  keywords     = {{Complementary roles; Detoxification; Endoconidiophora; Fungal symbionts; Grosmannia; Ips typographus; Ophiostoma; Phenolic defenses}},
  language     = {{eng}},
  pages        = {{71--79}},
  publisher    = {{Elsevier}},
  series       = {{Fungal Ecology}},
  title        = {{Fungal associates of the tree-killing bark beetle, Ips typographus, vary in virulence, ability to degrade conifer phenolics and influence bark beetle tunneling behavior}},
  url          = {{http://dx.doi.org/10.1016/j.funeco.2018.06.003}},
  doi          = {{10.1016/j.funeco.2018.06.003}},
  volume       = {{38}},
  year         = {{2019}},
}