La influencia de las agallas de Ditylenchus (Nematoda) y la sombra en la asimetría fluctuante de Miconia fallax (Melastomataceae)

Autores/as

  • Estevão Alves-Silva Programa de Pós-Graduação em Ecologia e Conservação dos Recursos Naturais; Instituto de Biologia, Universidade Federal de Uberlândia

Palabras clave:

efecto de borde, exposición a la luz, planta pionera, Cerrado

Resumen

La asimetría fluctuante (AF) se refiere a las pequeñas desviaciones al azar en la simetría bilateral de las estructuras y órganos que son bilateralmente simétricos, y permite estimar la incapacidad de una población cualquiera para corregir su crecimiento de acuerdo con disturbios y tensiones ambientales. Una consideración importante en los estudios de la AF es si los factores bióticos también pueden causar estrés en la planta. Por lo tanto, el objetivo de este estudio fue investigar la influencia conjunta de factores abióticos (exposición solar) y bióticos (presencia de agallas de Ditylenchus sp.) en la asimetría de las hojas de Miconia fallax. Las agallas de las hojas son parásitos, y como M. fallax es una planta pionera, los individuos que se encuentran en la sombra pueden presentar niveles altos de AF en comparación con los de los bordes, expuestos a la luz solar directa. El análisis no mostró ninguna interacción entre la abundancia de agallas, la exposición al sol y AF. El análisis separado reveló que los individuos a la sombra tenían niveles más altos de la AF, aproximadamente 25% más alto que los individuos en los bordes, lo cual muestra que los individuos de M. fallax con poca luz se encuentran en condiciones de estrés. La presencia de agallas no causó ningún cambio o aumento de la AF en comparación con las hojas sin agallas. La falta de relación entre la presencia de agallas y AF indica que los individuos de M. fallax tienen una gran capacidad para mantener la homeostasis, ya que la planta ha tolerado estos parásitos sin cambios significativos en la AF de las hojas.

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Publicado

2012-04-01

Cómo citar

Alves-Silva, E. (2012). La influencia de las agallas de Ditylenchus (Nematoda) y la sombra en la asimetría fluctuante de Miconia fallax (Melastomataceae). Ecología Austral, 22(1), 053–061. Recuperado a partir de https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1265