Journal of Comparative Physiology A

, Volume 194, Issue 12, pp 1043–1052

Gustatory synergism in ants mediates a species-specific symbiosis with lycaenid butterflies

  • Masaru K. Hojo
  • Ayako Wada-Katsumata
  • Mamiko Ozaki
  • Susumu Yamaguchi
  • Ryohei Yamaoka
Original Paper

DOI: 10.1007/s00359-008-0375-6

Cite this article as:
Hojo, M.K., Wada-Katsumata, A., Ozaki, M. et al. J Comp Physiol A (2008) 194: 1043. doi:10.1007/s00359-008-0375-6

Abstract

Here we show that larvae of the lycaenid butterfly Niphanda fusca secrete droplets containing trehalose and glycine. These droplets attract the larva’s host ants Camponotus japonicus, which collect and protect the larvae. We comparatively investigated gustatory preference for trehalose, glycine or a mixture of the two between host (C. japonicus) and non-host (Camponotus obscuripes) species of ants in behavioral and electrophysiological experiments. Glycine itself induced no taste sensation in either host or non-host ants. The mixture of trehalose plus glycine was chosen as much as pure trehalose by non-host ants. However, the host ants clearly preferred the mixture of trehalose plus glycine to trehalose alone. When we used sucrose instead of trehalose, the mixture of sucrose plus glycine was chosen as much as sucrose alone, in both species. These behavioral data are supported by the electrophysiological responsiveness to sugars and/or glycine in the sugar-taste receptor cells of the ants. Considering that lycaenid butterflies’ secretions have species-specific compositions of sugar and amino acid; our results clearly showed that such species-specific compositions of larval secretions are precisely tuned to the feeding preferences of their host ant species, in which the feeding preferences are synergistically enhanced by amino acid.

Keywords

LycaenidaeAntsSynergismObligate symbiosisNectar

Abbreviation

DNO

Dorsal nectary organ

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Masaru K. Hojo
    • 1
  • Ayako Wada-Katsumata
    • 2
  • Mamiko Ozaki
    • 3
  • Susumu Yamaguchi
    • 4
  • Ryohei Yamaoka
    • 1
  1. 1.Division of Applied Biology, Graduate School of Science and TechnologyKyoto Institute of TechnologyKyotoJapan
  2. 2.Division of Applied Life Science, Graduate of School of AgricultureKyoto UniversityKyotoJapan
  3. 3.Department of Biology, Graduate School of ScienceKobe UniversityKobeJapan
  4. 4.HokutoJapan