Ecología de la reproducción de Psychotria poeppigiana (Rubiaceae): un análisis comparativo entre plantas longiestiladas y breviestiladas
Palabras clave:
rubiaceae, biología floral, heteroestilia, polinización, Psychotria poeppigianaResumen
Investigamos la morfología floral, patrones de concentración de néctar y comportamiento de forrajeo visitantes florales en una población diestílica de Psychotria poeppigiana en un bosques secundarios en el Chocó (Colombia). La proporción de individuos de ambos morfos florales en la población fue 1:1. La hercogamia recíproca no fue perfecta entre los morfos, ya que flores longiestiladas presentaron mayor separación espacial entre anteras y estigma que aquellas breviestiladas. Entre morfos florales no observamos diferencias en patrones de floración y fructificación, ni en concentración de azucares en el néctar en horas puntuales a lo largo del día. Es evidente la relación existente entre la concentración de néctar y las visitas florales experimentadas por las plantas de cada morfo floral. Aunque Trigona spinipes fue el visitante floral más frecuente en ambos morfos florales, Phaethornis striigularis (colibrí) y Heliconius erato venus (mariposa) posiblemente cumplen un rol más importante como polinizadores. Al parecer, no existen conflictos reproductivos o especialización de género entre los morfos florales de P. poepigiana, ya que no apreciamos diferencias en los patrones fenológicos, oferta de néctar y visitas florales entre morfos florales.
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Derechos de autor 2009 Hamleth Valois-Cuesta, Diana Y. López-Perea, Zulay Quinto-Valoyes (Autor/a)
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