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The olfactory coreceptor IR8a governs larval feces-mediated competition avoidance in a hawkmoth

MPG-Autoren
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Zhang,  Jin
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Bisch-Knaden,  Sonja
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Fandino,  Richard A.
Research Group Dr. M. Knaden, Insect Behavior, Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Yan,  Shuwei
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Obiero,  George F.
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Grosse-Wilde,  Ewald
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Hansson,  Bill S.
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

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Knaden,  Markus
Research Group Dr. M. Knaden, Insect Behavior, Department of Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;

Externe Ressourcen

http://dx.doi.org/10.1073/pnas.1913485116
(Verlagsversion)

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HAN339.pdf
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Zitation

Zhang, J., Bisch-Knaden, S., Fandino, R. A., Yan, S., Obiero, G. F., Grosse-Wilde, E., et al. (2019). The olfactory coreceptor IR8a governs larval feces-mediated competition avoidance in a hawkmoth. Proceedings of the National Academy of Sciences of the United States of America, 116(43), 21828-21833. doi:10.1073/pnas.1913485116.


Zitierlink: https://hdl.handle.net/21.11116/0000-0004-6526-0
Zusammenfassung
Finding a suitable oviposition site is a challenging task for a gravid female moth. At the same time, it is of paramount importance considering the limited capability of most caterpillars to relocate to alternative host plants. The hawkmoth, Manduca sexta, oviposits on solanaceous plants. Larvae hatching on a plant that is already attacked by conspecific caterpillars face food competition. Here, we show that feces from conspecific caterpillars are sufficient to deter a female M. sexta from ovipositing on a plant. Furthermore, we not only identify the responsible compound in the feces but also localize the population of sensory neurons that governs the female’s avoidance. Hence, our work increases the understanding of how animals cope with a competitive environment.