Efectos alelopáticos de eriotheca ruizii sobre cultivos de importancia agronómica.

Abstract

Abstract:The bosque seco from Ecuador is one of the most relevant ecosystems. it is characterized by great diversity of species. Competence for resources in the bosque seco is very harsh and plants from this type of ecosystems can develop allelopathic strategies. A representative species from bosque seco is Eriotheca ruizii (K. Schum) A. Robyns, common name Pasallo (family Bombacaceae). In this work we investigated the effects that aqueous extracts from this species produce on the germination of seeds of species and varieties of agronomic importance. For this, it was studied whether there are differences between different tissues of E. ruizii and different concentrations on germination through germination bioassays. In addition, of the germination bioassays, we investigated the potential antibiotic activity of the plant extract in four bacterial species and a fungal one. In general, the aqueous extracts inhibit the normal germination process whereas for the antibiotic activity the cortex is the part that produced a better response in the inhibition of the antimicrobial activity.