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Natural selection on floral volatile production in Penstemon digitalis: Highlighting the role of linalool
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution. (Plant Ecology)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
Cornell.
Cornell.
2013 (English)In: Plant Signalling & Behavior, ISSN 1559-2316, E-ISSN 1559-2324, Vol. 8, no 1, e22704- p.Article in journal (Refereed) Published
Abstract [en]

Natural selection is thought to have shaped the evolution of floral scent; however, unlike other floral characters, we have a rudimentary knowledge of how phenotypic selection acts on scent. We found that floral scent was under stronger selection than corolla traits such as flower size and flower color in weakly scented Penstemon digitalis. Our results suggest that to understand evolution in floral phenotypes, including scent in floral selection, studies are crucial. For P. digitalis, linalool was the direct target of selection in the scent bouquet. Therefore, we determined the enantiomeric configuration of linalool because interacting insects may perceive the enantiomers differentially. We found that P. digitalis produces only (S)-(+)-linalool and, more interestingly, it is also taken up into the nectar. Because the nectar is scented and flavored with (S)-(+)-linalool, it may be an important cue for pollinators visiting P. digitalis flowers.

Place, publisher, year, edition, pages
2013. Vol. 8, no 1, e22704- p.
Keyword [en]
Natural selection, floral volatile, Penstemon digitalis, linalool.
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-196861DOI: 10.4161/psb.22704PubMedID: 23221753OAI: oai:DiVA.org:uu-196861DiVA: diva2:610986
Available from: 2013-03-13 Created: 2013-03-13 Last updated: 2017-12-06Bibliographically approved

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Parachnowitsch, AmyBurdon, Rosalie

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