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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/132724
Título

Flower-visitor selection on floral integration in three contrasting populations of Lonicera implexa

AutorLázaro, Amparo ; Santamaría, Luis
Palabras claveCorolla-tube length
Anther height
Pollinator visitation
Stigma height
Upper-lip size
Macroglossum
Fecha de publicación2016
EditorBotanical Society of America
CitaciónAmerican Journal of Botany 103(2): 325-336 (2016)
ResumenPREMISE OF THE STUDY: Geographic differences in flower visitor assemblages might lead to among-population differences in the magnitude and pat- tern of floral integration. However, the role of current pollinator visitation in shaping the magnitude and pattern of floral trait correlations is still controversial. METHODS: We used individual-level data on floral morphology, flower visitation, and fitness to assess if floral integration (at flower and floral-module level) and the covariance structure of floral traits varied among three populations of Lonicera implexa differing in the importance of long-tongue (hawk moths) and short-tongue (bees and small beetles) pollinators; and to assess whether this variation was related to the selection pressures exerted by flower visitors. KEY RESULTS: Short-tongue pollinators preferentially visited plants with floral traits that enhanced flower accessibility; consequently, there was directional selection for accessibility (integration at floral-module level) in the populations where they dominated or codominated. In the population with both shortand long-tongue pollinators, disruptive selection on corolla width and directional selection against whole-flower integration was also found. Dominance by long-tongue pollinators (hawk moths) resulted in disruptive selection on whole-flower integration. Overall, the conflicting selection pressures that were found matched among-population differences in covariance structure: populations with short-tongue pollinators showed correlations between corolla-tube width and other floral traits that were absent in the population pollinated primarily by hawk moths. CONCLUSIONS: Conflicting selection on floral integration mediated by floral visitors can occur even in nearby populations of a species with restricted floral morphology.
Versión del editorhttp://dx.doi.org/10.3732/ajb.1500336
URIhttp://hdl.handle.net/10261/132724
DOI10.3732/ajb.1500336
Identificadoresdoi: 10.3732/ajb.1500336
issn: 0002-9122
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