Eficacia reproductiva de Sobralia Ruiz & Pav. (ORCHIDACEAE) en la provincia de Zamora Chinchipe, Sur del Ecuador.

Abstract

Reproductive succes of an Ephemeral Sobralia orchid flower evaluated in two species S. rosea and S. setigera and four populations in southern Ecuador is described. Autogamy treatments (controlled hand pollination with pollen from the same flower) and xenogamy (flower pollen individuals from other populations) were used to analyze the effect on fruit production. The results indicate that the reproductive strategy used is dependent allogamy pollinator are self-compatible species (ISI => 0.28 and 0.26 S. S. setigera rosea). As for the morphometric variation of the pieces flowers little significant change in morphology and expression of floral traits such as number of flowers, flower color, length and width of the lip and petals, among the populations studied is determined. However populations showed high fruit production allocation (Fruit set: 80% and 90% S. S. rosea setigera) suggesting morphometric variation and distribution of detected individuals in populations not affect reproductive success.