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Muñoz Castaño, Nydia Johanna

Resumen

Passiflora genus comprises great genetic diversity. Because of this, it is considered the most important group in Passifloraceae’s family, sheltering more than 525 species, being Colombia a strategic place for its species richness. Passiflora biflora, P. capsularis and P. coriacea are wild species that present high phylogenetic relationship and would be found living in sympatry. Aiming to understand the coexistence of the three Passiflora species, its reproductive biology was evaluated with the following aspects: Morphology and floral biology, temporal population phenology, reproductive system, floral visitors with its role in the pollination and plant pollination efficiency. The study was conducted in three wild populations, one for each species, located in Anapoima, Cundinamarca. Results showed that the three species exhibit morphological and reproductive differences, despite sharing characteristics attributed to Passiflora’s genus. The three species produce an average of 24 flowers per individual, and bloom continuously throughout the year and bloom continuously throughout the year, in contrast to P. capsularis that presents a seasonal period from September to February. In the three species the pollination was diurnal, being the xenogamy or cross pollination the reproductive system that prevails. A difference in species’ pollinator was found: P. biflora is pollinated by large bees, while P. capsularis mostly by small sized flies and P. coriacea by medium sized bees. Likewise, the results showed that the three species are efficient in their reproduction. In this context, is was concluded that the three sympatric species present efficient reproductive strategies, that are attibuted to the presence of a prezygotic reproductive isolation evidenced in characteristics and floral attributes of each species, allowing the presence of reproductive barriers as a morphological type, where androgynophore’s length was decisive in the pollinator selection; phenological barriers, that is evidenced in the differences around the flowering peaks, and apollinator isolation due to the pollinatior’s differences between the three Passiflora species. These three mechanisms of reproductive isolation allows a reproductive success in the three passionflowers through the production of viable fruits

Palabras clave

Fenología vegetal, Hibridación vegetal, Passiflora, Reproducción de las plantas

Tipo de documento

Trabajo de grado - Pregrado

Licencia Creative Commons

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Fecha de elaboración

1-1-2016

Programa académico

Biología

Facultad

Departamento de Ciencias Básicas

Publisher

Universidad de La Salle. Departamento de Ciencias Básicas. Biología

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