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Divergence in Olfactory Host Plant Preference in D. mojavensis in Response to Cactus Host Use

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  • Priya Date
  • Hany K M Dweck
  • Marcus C Stensmyr
  • Jodi Shann
  • Bill S Hansson
  • Stephanie M Rollmann

Abstract

Divergence in host adaptive traits has been well studied from an ecological and evolutionary perspective, but identification of the proximate mechanisms underlying such divergence is less well understood. Behavioral preferences for host plants are often mediated by olfaction and shifts in preference may be accompanied by changes in the olfactory system. In this study, we examine the evolution of host plant preferences in cactophilic Drosophila mojavensis that feeds and breeds on different cacti throughout its range. We show divergence in electrophysiological responses and olfactory behavior among populations with host plant shifts. Specifically, significant divergence was observed in the Mojave Desert population that specializes on barrel cactus. Differences were observed in electrophysiological responses of the olfactory organs and in behavioral responses to barrel cactus volatiles. Together our results suggest that the peripheral nervous system has changed in response to different ecological environments and that these changes likely contribute to divergence among D. mojavensis populations.

Suggested Citation

  • Priya Date & Hany K M Dweck & Marcus C Stensmyr & Jodi Shann & Bill S Hansson & Stephanie M Rollmann, 2013. "Divergence in Olfactory Host Plant Preference in D. mojavensis in Response to Cactus Host Use," PLOS ONE, Public Library of Science, vol. 8(7), pages 1-10, July.
    • Handle: RePEc:plo:pone00:0070027
    DOI: 10.1371/journal.pone.0070027
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    References listed on IDEAS

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    1. Andreas Keller & Hanyi Zhuang & Qiuyi Chi & Leslie B. Vosshall & Hiroaki Matsunami, 2007. "Genetic variation in a human odorant receptor alters odour perception," Nature, Nature, vol. 449(7161), pages 468-472, September.
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