Entomopathogenic nematodes increase predation success by inducing cadaver volatiles that attract healthy herbivores

Zhang, Xi; Machado, Ricardo AR; Doan, Van Cong; Arce, Carla CM; Hu, Lingfei; Robert, Christelle AM (2019). Entomopathogenic nematodes increase predation success by inducing cadaver volatiles that attract healthy herbivores. eLife, 8(e46668) eLife Sciences Publications 10.7554/eLife.46668

[img]
Preview
Text
elife-46668-v1.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (4MB) | Preview

Herbivore natural enemies protect plants by regulating herbivore populations. Whether they can alter the behavior of their prey to increase predation success is unknown. We investigate if and how infection by the entomopathogenic nematode Heterorhabditis bacteriophora changes the behavior of healthy larvae of the western corn rootworm (Diabrotica virgifera), a major pest of maize. We found that nematode-infected rootworm cadavers are attractive to rootworm larvae, and that this behavior increases nematode reproductive success. Nematode-infected rootworms release distinct volatile bouquets, including the unusual volatile butylated hydroxytoluene (BHT). BHT alone attracts rootworms, and increases nematode reproductive success. A screen of different nematode and herbivore species shows that attraction of healthy hosts to nematode-infected cadavers is widespread and likely involves species-specific volatile cues. This study reveals a new facet of the biology of herbivore natural enemies that boosts their predation success by increasing the probability of host encounters.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biotic Interactions
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Zhang, Xi; Machado, Ricardo; Doan, Van Cong; Marques Arce, Carla Cristina; Hu, Lingfei and Robert, Christelle Aurélie Maud

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

2050-084X

Publisher:

eLife Sciences Publications

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

28 Feb 2020 10:10

Last Modified:

28 Feb 2020 10:10

Publisher DOI:

10.7554/eLife.46668

PubMed ID:

31509107

BORIS DOI:

10.7892/boris.140965

URI:

https://boris.unibe.ch/id/eprint/140965

Actions (login required)

Edit item Edit item
Provide Feedback