Artículo
Nectary and Nectar Features: Occurrence, Significance, and Trends in Bignoniaceae
Fecha de publicación:
03/2009
Editorial:
The Society of Plant Reproductive Biology
Revista:
The Journal of Plant Reproductive Biology
ISSN:
0975-4296
e-ISSN:
2249-7390
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The variety of pollination strategies present in the Bignoniaceae makes the family ideal for comparative studies of the evolution of floral features. Six flower and nectar parameters were recorded from literature for 50 species (nectar concentration, volume per flower, and amount of sucrose, corolla length, and nectary size and stomata number). Comparisons were made between two pollinator guilds and two tribes. Significant differences were not detected between the tribes Tecomeae and Bignonieae (n= 21 and 16 species respectively). On the other hand, bee-pollinated species presented a higher nectar concentration and a lower nectar volume per flower than bird-pollinated species (n=29 and 8 species respectively). Results showed that some nectar features are correlated with the different pollinator guilds and may indicate nectar adaptations by flowers to their pollinators. Floral structural traits seem to be more conservative than nectar features because the lack of significant differences between tribes and pollinator guilds at both the species and the genus level. These patterns suggest that pollinators would be involved in primary changes on nectar traits and later, in a second evolutionary step, on structural floral modifications.
Palabras clave:
Nectar
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Identificadores
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Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Galetto, Leonardo; Nectary and Nectar Features: Occurrence, Significance, and Trends in Bignoniaceae; The Society of Plant Reproductive Biology; The Journal of Plant Reproductive Biology; 1; 2; 3-2009; 121-132
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