Is the variation of floral elaiophore size in two species of Stigmaphyllon (Malpighiaceae) dependent on interaction with pollinators?
| Autor: | Sandra S. Aliscioni, Juan Pablo Torretta, Adan Alberto Avalos, Adelia González Arzac |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
OIL-COLLECTING BEES Ecology biology Otras Ciencias Biológicas FLOWER-BEE INTERACTION Plant Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Malpighiaceae ELAIOPHORE MALPIGHIACEAE Ciencias Biológicas Variation (linguistics) Pollinator Stigmaphyllon Botany OIL-REWARDING FLOWERS Ecology Evolution Behavior and Systematics CIENCIAS NATURALES Y EXACTAS 010606 plant biology & botany |
| DOI: | 10.1080/17550874.2018.1434567 |
| Popis: | Background: Intraspecific variations in floral traits of species over its geographic range can be associated with differences in pollinator assemblages and/or with environmental conditions. Aims: We evaluated the area of elaiophores in different populations of Stigmaphyllon bonariense (n = 9) and S. jatrophifolium (n = 6), and we hypothesised a marked reduction in their size towards their southern limits of distribution, associated with different oil-collecting bee assemblages. Methods: Area of elaiophores was calculated and we carried out linear correlations with floral size, pollinators, visitation rate and pollinator size along the latitudinal gradient of the plants’ distributions. Moreover, we examined the relative size relationships using allometric analyses, to verify this reduction. Results: Floral elaiophore area decreased with latitude. However, for S. bonariense we observed an allometric reduction in elaiophore area with respect to floral size, while for S. jatrophifolium an isometric reduction was found. In both species, pollinator richness and visitation rate did not diminish with latitude, but pollinator size for S. bonariense varied. Conclusions: Our results show a reduction in the size of elaiophores in both species along their distribution range, with dissimilar tendencies, suggesting that these species may have different selection pressures that cause variation of their phenotypic traits. Fil: Torretta, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentina Fil: Aliscioni, Sandra Silvina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentina Fil: González Arzac, Adelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentina Fil: Avalos, Adan Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto de Botánica de Nordeste; Argentina |
| Databáze: | OpenAIRE |
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