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AOBPreview originally published online on April 18, 2008
Annals of Botany 2008 101(9):1413-1420; doi:10.1093/aob/mcn053
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© The Author 2008. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Association Between Floral Traits and Rewards in Erysimum mediohispanicum (Brassicaceae)

José M. Gómez1,*, Jordi Bosch3, Francisco Perfectti2, J. D. Fernández1, Mohamed Abdelaziz2 and J. P. M. Camacho2

1 Departamento de Ecología
2 Departamento de Genética, Universidad de Granada, Granada 18071, Spain
3 Unidad de Ecología/CREAF, Universidad Autónoma de Barcelona, Barcelona, Spain

* For correspondence at: Dr José M. Gómez Universidad de Granada Ecología Avda Fuentenueva s/n Granada 18071 Spain 34 958 241000 ext 20069 jmgreyes{at}ugr.es

Received: 16 January 2008    Returned for revision: 28 February 2008    Accepted: 5 March 2008    Published electronically: 18 April 2008

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.

Key words: Erysimum, floral traits, nectar, pollen, pollinator visitation rate, reward


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