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Luis Diego Rios

Publications and source records attributed to Luis Diego Rios.

2 recordsLinked to original sources

Late flowering and low synchrony with males enhance female reproductive success in the dioecious palm Chamaedorea pinnatifrons

INTRODUCTION INTRODUCTION MATERIALS AND METHODS RESULTS DISCUSSION Conclusion LITERATURE CITED Dioecious plants (i.e., with separate sexes) obligatorily require the contribution of a conspecific, and the synchronization of a series of events to achieve sexual reproduction (Bawa 1980). In these plants pollination is only possible when a series of successive events occur: temporal overlap of male and female flowering, sufficient quality pollen is produced by male plants, there is an effective mechanism for pollen capture in female plants, and adequate pollen transportation (Givnish 1982). However, pollination could be farther affected by population density, population sex ratio, individual phenological behavior, individual size, and the species pollination system ( ...

Ecology

High selfing capability and low pollinator visitation in the epiphyte Pitcairnia heterophylla (Bromeliaceae) at a Costa Rican cloud forest

Most epiphytic bromeliads exhibit specialized pollination systems likely to promote out-crossing but, at the same time, possess floral traits that promote autonomous selfing. Adaptations that promote selfing in flowering plants with specialized pollination systems have been considered as a mechanism for reproductive assurance. In this paper, we analyzed the breeding system and pollinator visitation rate of the hummingbird-pollinated bromeliad Pitcairnia heterophylla in order to see if they fit such trend. We performed hand pollination experiments, video recording of floral visitors, and recorded floral traits in order to describe the reproductive and pollination system of the studied species in a cloud forest in Costa Rica. Results from the pollination treatments indicated that P. heterophylla is self-compatible (SCIf = 0.77), capable of autonomous pollination (AFIf = 0.78), and non-agamospermous (AGf = 0.01). Floral traits, such as scentless red flowers, with tubular corolla and nectar production, suggested ornithophily which was confirmed by the video recording of Lampornis calolaemus (Trochilidae) visiting flowers. However, the visitation rate was low (0.6 visits day-1 per plant) based on 918 hours of video recording using trail cameras. We suggest that the high selfing capability of the studied population of P. heterophylla might be related to the low pollinator visitation rate. If low pollinator visitation is common among hummingbird-pollinated and epiphytic bromeliads, then selfing could be a widespread mechanism to enhance their reproductive success.

Plant Biology