Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Transiciones de comportamiento durante la metamorfosis: Los sucesores de escototropismo

Creator

Oliver Kroner

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Publication Date

May 2005

Abstract

Metamorphosis in the plant family Araceae is generally considered only on a morphological basis, but clearly involves behavioral transitions as well. Many metamorphic climbing vines use skototropism as a method of host-location and then relinquish it before ascent. The reactions of eight individual Monstera to changes across vertical and horizontal light gradients were used to evaluate possible replacements for skototropism. Three possibilities were proposed: (1) climbing without preference (2) phototropism, (3) thigmotropism. Data were inconclusive, but strongly suggested the improbability of (2) and (3). Monstera encountered regions of increasing light intensity (lux) with increasing height, but did not demonstrate horizontal tendencies toward light. Monstera did show a significant preference for the southern quadrant, indicating the influence of abiotic factors. La metamorfosis en la familia de plantas Araceae se considera generalmente sólo en una base morfológica, pero también implica claramente las transiciones de comportamiento. Muchas enredaderas metamórficas utilizan el escototropismo como un método para encontrar al anfitrión y lo dejan de utilizar antes de empezar a subir. Se utilizaron las reacciones de ocho individuos de Monstera a cambios en gradientes verticales y horizontales de luz para evaluar los reemplazos posibles para el escototropismo. Se propusieron tres posibilidades: (1) Ascender sin preferencia por la luz (2) Fototropismo, y (3) Tigmotropismo. Los datos no fueron decisivos, pero sugirieron muy enfáticamente la improbabilidad de (2) y (3). Los individuos de Monstera encontraron regiones con incrementos de intensidad de la luz (lux) conforme la elevación aumentaba, pero no mostraron tendencias horizontales hacia la luz. Monstera mostró una preferencia significativa hacia el cuadrante meridional, indicando la influencia de factores abióticos.

Keywords

Climbing plants, Plantas trepadoras, Plants--Adaptation, Plantas--Adaptacion, Monteverde Biological Station (Costa Rica), Estacion Biologica de Monteverde (Costa Rica), Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Spring 2005, CIEE Primavera 2005

Description

Student Affiliation : Department of Earth and Environmental Sciences, Northeastern University, Boston, MA Born Digital

Subject: topical

Climbing plants; Plantas trepadoras; Plants--Adaptation; Plantas--Adaptacion; Monteverde Biological Station (Costa Rica); Estacion Biologica de Monteverde (Costa Rica); Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde; CIEE Spring 2005; CIEE Primavera 2005

Genre

Reports

Holding Location

|Monteverde Institute MVI

Identifier

M39-00217

Behavioral transitions during metamorphosis: Skototropism’s successors

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