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Proc Biol Sci. 2005 Dec 7;272(1580):2499-503.

The pathogen causing Dutch elm disease makes host trees attract insect vectors.

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1
Simon Fraser University Department of Biological Sciences Burnaby, BC, Canada V5A 1S6.

Abstract

Dutch elm disease is caused by the fungal pathogen Ophiostoma novo-ulmi which is transmitted by the native elm bark beetle, Hylurgopinus rufipes. We have found that four semiochemicals (the monoterpene (-)-beta-pinene and the sesquiterpenes (-)-alpha-cubebene, (+)-spiroaxa-5,7-diene and (+)-delta-cadinene) from diseased American elms, Ulmus americana, synergistically attract H. rufipes, and that sesquiterpene emission is upregulated in elm trees inoculated with O. novo-ulmi. The fungus thus manipulates host trees to enhance their apparency to foraging beetles, a strategy that increases the probability of transportation of the pathogen to new hosts.

PMID:
16271975
PMCID:
PMC1599782
DOI:
10.1098/rspb.2005.3202
[Indexed for MEDLINE]
Free PMC Article
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