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Floral Scents of a Deceptive Plant Are Hyperdiverse and Under Population-Specific Phenotypic Selection

Abstract : Floral scent is a key mediator in plant-pollinator interactions; however, little is known to what extent intraspecific scent variation is shaped by phenotypic selection, with no information yet in deceptive plants. We collected inflorescence scent and fruit set of the deceptive fly-pollinated Arum maculatum from various populations north vs. south of the Alps. We recorded 291 scent compounds and found that scent and fruit set differed north vs. south of the Alps. Seven and two compounds were under phenotypic selelection in the largest northern and southern population respectively, among them none of the four presently known pollinator attractants of A. maculatum. Our study provides the highest number of scent compounds so far reported in a single plant species and provides evidence for the first time that floral scents of a deceptive species are under phenotypic selection. It suggests that regional differences in scent are only partly due to divergent selection.
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https://hal.archives-ouvertes.fr/hal-03448772
Contributor : Marc Gibernau Connect in order to contact the contributor
Submitted on : Thursday, November 25, 2021 - 12:55:03 PM
Last modification on : Friday, November 26, 2021 - 3:45:56 AM

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Eva Gfrerer, Danae Laina, Marc Gibernau, Roman Fuchs, Martin Happ, et al.. Floral Scents of a Deceptive Plant Are Hyperdiverse and Under Population-Specific Phenotypic Selection. Frontiers in Plant Science, Frontiers, 2021, 12, pp.719092. ⟨10.3389/fpls.2021.719092⟩. ⟨hal-03448772⟩

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