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Flower specialisation: the occluded corolla of snapdragons (Antirrhinum) exhibits two pollinator niches of large long-tongued bees

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Vargas, P. y Liberal, I. M. y Ornosa Gallego, Concepción y Gómez, J. M. (2017) Flower specialisation: the occluded corolla of snapdragons (Antirrhinum) exhibits two pollinator niches of large long-tongued bees. Plant Biology, 19 (5). pp. 787-797. ISSN 1435-8603, ESSN: 1438-8677

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URL Oficial: http://onlinelibrary.wiley.com/doi/10.1111/plb.12588/full



Resumen

Flower specialisation of angiosperms includes the occluded corollas of snapdragons (Antirrhinum and some relatives), which have been postulated to be one of the most efficient structures to physical limit access to pollinators. The Iberian Peninsula harbours the highest number of species (18 Iberian of the 20 species of Antirrhinum) that potentially share similar pollinator fauna.
•Crossing experiments with 18 Iberian species from this study and literature revealed a general pattern of self-incompatibility (SI) – failure in this SI system has been also observed in a few plants – which indicates the need for pollinator agents in Antirrhinum pollination.
•Field surveys in natural conditions (304 h) found flower visitation (>85%) almost exclusively by 11 species of bee (Anthophora fulvitarsis, Anthophora plumipes, Anthidium sticticum, Apis mellifera, Bombus hortorum, Bombus pascuorum, Bombus ruderatus, Bombus terrestris, Chalicodoma lefebvrei, Chalicodoma pyrenaica and Xylocopa violacea). This result covering the majority of Antirrhinum species suggests that large bees of the two long-tongued bee families (Megachilidae, Apidae) are the major pollinators of Antirrhinum.
•A bipartite modularity analysis revealed two pollinator systems of long-tongued bees: (i) the long-studied system of bumblebees (Bombus spp.) associated with nine primarily northern species of Antirrhinum; and (ii) a newly proposed pollinator system involving other large bees associated with seven species primarily distributed in southern Mediterranean areas


Tipo de documento:Artículo
Palabras clave:Antirrhineae; Mating systems; Mediterranean bees; Occluded corolla; Personate flower; Pollinator systems; self-imcompatibility
Materias:Ciencias Biomédicas > Biología > Botánica
Ciencias Biomédicas > Biología > Insectos
Código ID:46399
Depositado:09 Feb 2018 11:22
Última Modificación:10 Dic 2018 15:25

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