Estudio de la influencia de cepas de hongos micorrízicos de orquídeas en crecimiento y desarrollo de las plántulas de algunas especies de orquídeas epífitas en condiciones de laboratorio.

Abstract

Orchid plants are very diverse in the ecosystems and they require an association with specific mycorrhizal fungi. The overall aim of this study was test if the selected mycorrhizal fungi can improve the development of orchid seedlings Cattleya iricolor, Galeottia acuminata, Helcia sanguinolenta. Five fungi strains belonging to the genera Tulasnella and Ceratobasidium were inoculated for in vitro growth experiments. Five variables such as seedling weight (PP); seedling length (LP); Leave number (NH); Root number (NR); and root length (LR), were evaluated at the beginning and at the end of the experiment during six months in controlled conditions. Results show differences responses among orchid species. One species of Tulasnella had a significant effect on the weight and the length of the seedlings of Cattleya iricolor and Helcia sanguinolenta. On the other hand, the species Ceratobasidium presented an effect on the seedlings weight of Galeottia acuminate showing a grade of fungi specificity on evaluated orchid species