Arthropod-Plant Interactions

, 2:237

Flower colour variation across a hybrid zone in Antirrhinum as perceived by bumblebee pollinators

  • Emmanuelle Tastard
  • Christophe Andalo
  • Martin Giurfa
  • Monique Burrus
  • Christophe Thébaud
Original Paper

DOI: 10.1007/s11829-008-9046-3

Cite this article as:
Tastard, E., Andalo, C., Giurfa, M. et al. Arthropod-Plant Interactions (2008) 2: 237. doi:10.1007/s11829-008-9046-3

Abstract

To assess if pollinators’ behaviour could explain the maintenance of hybrid zones between different flower colour morphs, we analyzed flower colour variation in an Antirrhinum hybrid zone using spectrometry and a model of bee perception. Some colours generated by hybridization were not observed in any Antirrhinum species and even appeared to be rare among angiosperms. Variation in flower colours within the hybrid zone was continuous; the most similar colours were predicted not to be discriminated from one another in natural foraging situations. However, when compared at a scale corresponding to bees’ foraging range, some flower colours could be discriminated from all colours displayed by neighbouring plants. This could affect pollinator behaviour and explain lower visitation rates within the centre of the hybrid zone. Behavioural studies involving bumblebees and plant mixtures of parental and hybrid flower colours carefully characterized with appropriate visual models will be necessary to test this hypothesis.

Keywords

Hybrid zoneFlower colourBee visual modelPollination ecology

Supplementary material

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Emmanuelle Tastard
    • 1
  • Christophe Andalo
    • 1
  • Martin Giurfa
    • 2
  • Monique Burrus
    • 1
  • Christophe Thébaud
    • 1
  1. 1.Laboratoire Evolution et Diversité BiologiqueUMR 5174, CNRS-Université Paul SabatierToulouse cedex 9France
  2. 2.Centre de Recherches sur la Cognition AnimaleUMR 5169, CNRS-Université Paul SabatierToulouse cedex 9France