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Journal Article

Host plant-driven sensory specialization in Drosophila erecta

MPS-Authors
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Linz,  Jeanine
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;
IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society;

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Baschwitz,  Amelie
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;
IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society;

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Strutz,  Antonia
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;
IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society;

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Dweck,  Hany
Department of Evolutionary Neuroethology, Prof. B. S. Hansson, MPI for Chemical Ecology, Max Planck Society;
IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society;

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Sachse,  Silke
Research Group Dr. S. Sachse, Olfactory Coding, MPI for Chemical Ecology, Max Planck Society;

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

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

External Resource

http://dx.doi.org/10.1098/rspb.2013.0626
(Publisher version)

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Fulltext (public)

HAN181.pdf
(Publisher version), 2MB

Supplementary Material (public)

HAN181s1.pdf
(Supplementary material), 6MB

Citation

Linz, J., Baschwitz, A., Strutz, A., Dweck, H., Sachse, S., Hansson, B., et al. (2013). Host plant-driven sensory specialization in Drosophila erecta. Proceedings of the Royal Society B: Biological Sciences, 280(1760): 20130626. doi:10.1098/rspb.2013.0626.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-F3FB-1
Abstract
Finding appropriate feeding and breeding sites is crucial for all insects. To fulfil this vital task, many insects rely on their sense of smell. Alterations in the habitat—or in lifestyle—should accordingly also be reflected in the olfactory system. Solid functional evidence for direct adaptations in the olfactory system is however scarce. We have, therefore, examined the sense of smell of Drosophila erecta, a close relative of Drosophila melanogaster and specialist on screw pine fruits (Pandanus spp.). In comparison with three sympatric sibling
species, D. erecta shows specific alterations in its olfactory system towards
detection and processing of a characteristic
Pandanus volatile (3-methyl-2- butenyl acetate, 3M2BA). We show that D. erecta
is more sensitive towards this substance, and that the increased sensitivity derives from a numerical increase of one olfactory sensory neuron (OSN) class. We also show that axons from these OSNs form a complex of enlarged glomeruli in the antennal lobe, the first olfactory brain centre, of D. erecta. Finally, we show that 3M2BA induces oviposition in D. erecta, but not in D. melanogaster. The presumed adaptations observed here follow to a remarkable degree those found in
Drosophila sechellia, a specialist upon noni fruit, and suggest a general principle for how specialization affects the sense of smell.