Journal Article

Association Between Floral Traits and Rewards in <i>Erysimum mediohispanicum</i> (Brassicaceae)

José M. Gómez, Jordi Bosch, Francisco Perfectti, J. D. Fernández, Mohamed Abdelaziz and J. P. M. Camacho

in Annals of Botany

Published on behalf of The Annals of Botany Company

Volume 101, issue 9, pages 1413-1420
Published in print June 2008 | ISSN: 0305-7364
Published online April 2008 | e-ISSN: 1095-8290 | DOI: http://dx.doi.org/10.1093/aob/mcn053
Association Between Floral Traits and Rewards in Erysimum mediohispanicum (Brassicaceae)

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  • Ecology and Conservation
  • Evolutionary Biology
  • Plant Sciences and Forestry

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Background and Aims

Floral rewards may be associated with certain morphological floral traits and thus act as underlying factors promoting selection on these traits. This study investigates whether some traits that are under pollinator-mediated selection (flower number, stalk height, corolla diameter, corolla tube length and corolla tube width) in the Mediterranean herb E. mediohispanicum (Brassicaceae) are associated with rewards (pollen and nectar).

Methods

During 2005 the phenotypic traits and the visitation rate of the main pollinator functional groups were quantified in 720 plants belonging to eight populations in south-east Spain, and during 2006 the same phenotypic traits and the reward production were quantified in 400 additional plants from the same populations.

Key Results

A significant correlation was found between nectar production rate and corolla tube length, and between pollen production and corolla diameter. Visitation rates of large bees and butterflies were significantly higher in plants exhibiting larger flowers with longer corolla tubes.

Conclusions

The association between reward production and floral traits may be a factor underlying the pattern of visitation rate displayed by some pollinators.

Keywords: Erysimum; floral traits; nectar; pollen; pollinator visitation rate; reward

Journal Article.  5836 words.  Illustrated.

Subjects: Ecology and Conservation ; Evolutionary Biology ; Plant Sciences and Forestry

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