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Journal of Chemical Ecology

, Volume 33, Issue 4, pp 749–765 | Cite as

Inter- and Intraspecific Variation in Floral Scent in the Genus Salix and its Implication for Pollination

  • Ulrike Füssel
  • Stefan Dötterl
  • Andreas Jürgens
  • Gregor Aas
Article

Abstract

The floral scent composition of 32 European and two Asian Salix L. species (Salicaceae) was analyzed. Intra- and interspecific variation was compared for a subset of 8 species. All Salix species are dioecious and floral scent was collected from both male and female individuals by using a dynamic headspace MicroSPE method, and analyzed by GC-MS. A total of 48 compounds were detected, most of them being isoprenoids and benzenoids. Commonly occurring compounds included trans-β-ocimene, cis-β-ocimene, benzaldehyde, d-limonene, α-pinene, cis-3-hexenyl aceatate, linalool, 1,4-dimethoxybenzene, and β-pinene. Two compounds, 1,4-dimethoxybenzene and trans-β-ocimene, were responsible for most of the interspecific variation. In a subset of eight extensively sampled species, six had a characteristic floral scent composition; half of the pairwise species comparisons confirmed significant differences. In three of these eight species, intraspecific variability could be explained by sex differences. Variation in Salix floral scent may provide specific signals that guide pollinators and thus contribute to the reproductive isolation of compatible and cooccurring species.

Keywords

Dioecy Floral scent GC-MS Intraspecific variation Interspecific variation Salix Salicaceae 

Notes

Acknowledgements

Parts of the study were supported by the German Research Foundation (Research Training Group 678). The authors thank F. Beyer and I. Schäffler for floral scent collection, and A. Lieflaender, A. Reuter, M. Suckling, T. Witt, and two anonymous reviewers for valuable comments on the manuscript.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Ulrike Füssel
    • 1
  • Stefan Dötterl
    • 2
  • Andreas Jürgens
    • 3
  • Gregor Aas
    • 1
  1. 1.Ecological–Botanical GardenUniversity of BayreuthBayreuthGermany
  2. 2.Department of Plant SystematicsUniversity of BayreuthBayreuthGermany
  3. 3.HortResearchCanterbury Research CentreLincolnNew Zealand

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