INVESTIGADORES
ORDANO Mariano Andres
artículos
Título:
Nectar removal effects on seed production in Moussonia deppeana (Gesneriaceae), a hummingbird-pollinated shrub
Autor/es:
JUAN FRANCISCO ORNELAS; MARIANO ORDANO; CARLOS LARA
Revista:
ECOSCIENCE (SAINTE-FOY)
Editorial:
Université Laval
Referencias:
Lugar: Québec, Canada; Año: 2007 vol. 14 p. 117 - 123
ISSN:
1195-6860
Resumen:
Animal-pollinated
angiosperm plants that respond positively to nectar removal by replenishment
invest energy that can entail a reproductive cost. Here we use nectar removal
manipulation to investigate whether nectar removal increases total nectar
production in Moussonia deppeana (Gesneriaceae) and to see if this leads to
lower seed production. We found that flowers strongly respond to increased
nectar removal by producing 2-4 times as much additional nectar. Other nectar
removal treatments had little effect on nectar production and rule out
alternative explanations at the flower level. Compared with open-pollinated
flowers, hand cross-pollination yielded similar seed production in flowers with
experimentally increased nectar removal. Although flower-level effects of
nectar replenishment on seed production were not detected in M. deppeana, cost
of nectar replenishment need further study as tradeoffs between nectar
production and seed production could be expressed at the plant level and/or as
long-term effects.