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An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars

Herbivore-induced plant volatiles (HIPVs) can mediate tritrophic interactions by attracting natural enemies of insect herbivores such as predators and parasitoids. Whether HIPVs can also mediate tritrophic interactions by influencing the attractiveness of the herbivores themselves remains unknown. W...

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Autores principales: Ye, Meng, Veyrat, Nathalie, Xu, Hao, Hu, Lingfei, Turlings, Ted C. J., Erb, Matthias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5955622/
https://www.ncbi.nlm.nih.gov/pubmed/29774237
http://dx.doi.org/10.1126/sciadv.aar4767
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author Ye, Meng
Veyrat, Nathalie
Xu, Hao
Hu, Lingfei
Turlings, Ted C. J.
Erb, Matthias
author_facet Ye, Meng
Veyrat, Nathalie
Xu, Hao
Hu, Lingfei
Turlings, Ted C. J.
Erb, Matthias
author_sort Ye, Meng
collection PubMed
description Herbivore-induced plant volatiles (HIPVs) can mediate tritrophic interactions by attracting natural enemies of insect herbivores such as predators and parasitoids. Whether HIPVs can also mediate tritrophic interactions by influencing the attractiveness of the herbivores themselves remains unknown. We explored this question by studying the role of indole, a common HIPV in the plant kingdom. We found that herbivory-induced indole increases the recruitment of the solitary endoparasitoid Microplitis rufiventris to maize plants that are induced by Spodoptera littoralis caterpillars. Surprisingly, however, indole reduces parasitoid recruitment when the caterpillars themselves are present on the plants. Further experiments revealed that indole exposure renders S. littoralis caterpillars unattractive to M. rufiventris, leading to an overall reduction in attractiveness of plant-herbivore complexes. Furthermore, indole increases S. littoralis resistance and decreases M. rufiventris parasitization success. S. littoralis caterpillars are repelled by indole in the absence of M. rufiventris but specifically stop avoiding the volatile in the presence of the parasitoid. Our study shows how an HIPV can undermine tritrophic interactions by reducing the suitability and attractiveness of caterpillars to parasitoids.
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spelling pubmed-59556222018-05-17 An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars Ye, Meng Veyrat, Nathalie Xu, Hao Hu, Lingfei Turlings, Ted C. J. Erb, Matthias Sci Adv Research Articles Herbivore-induced plant volatiles (HIPVs) can mediate tritrophic interactions by attracting natural enemies of insect herbivores such as predators and parasitoids. Whether HIPVs can also mediate tritrophic interactions by influencing the attractiveness of the herbivores themselves remains unknown. We explored this question by studying the role of indole, a common HIPV in the plant kingdom. We found that herbivory-induced indole increases the recruitment of the solitary endoparasitoid Microplitis rufiventris to maize plants that are induced by Spodoptera littoralis caterpillars. Surprisingly, however, indole reduces parasitoid recruitment when the caterpillars themselves are present on the plants. Further experiments revealed that indole exposure renders S. littoralis caterpillars unattractive to M. rufiventris, leading to an overall reduction in attractiveness of plant-herbivore complexes. Furthermore, indole increases S. littoralis resistance and decreases M. rufiventris parasitization success. S. littoralis caterpillars are repelled by indole in the absence of M. rufiventris but specifically stop avoiding the volatile in the presence of the parasitoid. Our study shows how an HIPV can undermine tritrophic interactions by reducing the suitability and attractiveness of caterpillars to parasitoids. American Association for the Advancement of Science 2018-05-16 /pmc/articles/PMC5955622/ /pubmed/29774237 http://dx.doi.org/10.1126/sciadv.aar4767 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Ye, Meng
Veyrat, Nathalie
Xu, Hao
Hu, Lingfei
Turlings, Ted C. J.
Erb, Matthias
An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title_full An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title_fullStr An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title_full_unstemmed An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title_short An herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
title_sort herbivore-induced plant volatile reduces parasitoid attraction by changing the smell of caterpillars
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5955622/
https://www.ncbi.nlm.nih.gov/pubmed/29774237
http://dx.doi.org/10.1126/sciadv.aar4767
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