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Volatiles produced by soil-borne endophytic bacteria increase plant pathogen resistance and affect tritrophic interactions

D'Alessandro, Marco and Erb, Matthias and Ton, Jurriaan and Brandenburg, Anna and Karlen, Danielle and Zopfi, Jakob and Turlings, Ted C. J.. (2014) Volatiles produced by soil-borne endophytic bacteria increase plant pathogen resistance and affect tritrophic interactions. Plant, Cell and Environment, 37 (4). pp. 813-826.

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Official URL: http://edoc.unibas.ch/50434/

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Abstract

Volatile organic compounds (VOCs) released by soil microorganisms influence plant growth and pathogen resistance. Yet, very little is known about their influence on herbivores and higher trophic levels. We studied the origin and role of a major bacterial VOC, 2,3‐butanediol (2,3‐BD), on plant growth, pathogen and herbivore resistance, and the attraction of natural enemies in maize. One of the major contributors to 2,3‐BD in the headspace of soil‐grown maize seedlings was identified as Enterobacter aerogenes, an endophytic bacterium that colonizes the plants. The production of 2,3‐BD by E. aerogenes rendered maize plants more resistant against the Northern corn leaf blight fungus Setosphaeria turcica. On the contrary, E. aerogenes‐inoculated plants were less resistant against the caterpillar Spodoptera littoralis. The effect of 2,3‐BD on the attraction of the parasitoid Cotesia marginiventris was more variable: 2,3‐BD application to the headspace of the plants had no effect on the parasitoids, but application to the soil increased parasitoid attraction. Furthermore, inoculation of seeds with E. aerogenes decreased plant attractiveness, whereas inoculation of soil with a total extract of soil microbes increased parasitoid attraction, suggesting that the effect of 2,3‐BD on the parasitoid is indirect and depends on the composition of the microbial community.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Umweltgeowissenschaften > Geochemie Stoffkreisläufe (Lehmann)
UniBasel Contributors:Zopfi, Jakob
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley
ISSN:0140-7791
e-ISSN:1365-3040
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:25 Apr 2018 08:43
Deposited On:25 Apr 2018 08:43

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