RESUMEN
Chemical characterization of the essential oils of two Lippia species by GC-MS and NMR spectroscopy revealed that limonene (84.3%) and ß-caryophyllene (6.1%) were the most abundant components in Lippia turbinata while (6S,7S,10S)-trans-davanone (99.1%) predominated in Lippia integrifolia. Antifungal activity of the essential oils was determined by headspace volatile exposure assay against the fungal phytopathogenic Sclerotinia sclerotiorum, Sclerotium rolfsii and Rhizoctonia solani. The essential oil of L. turbinata showed potent antifungal activity against the panel of fungi tested while that the oil of L. integrifolia significantly inhibited the mycelial growth of S. rolfsii and R. solani.
La caracterizacioÌn quiÌmica de los aceites esenciales de dos especies de Lippia por cromatografiÌa gaseosa-espectrometriÌa de masas (CG-EM) y espectroscopia de RMN reveloÌ que limoneno (84,3%) y ß-cariofileno (6,1%) fueron los componentes maÌs abundantes de Lippia turbinata mientras que (6S,7S,10S)-trans-davanona (99,1%) predominoÌ en Lippia integrifolia. La actividad antifuÌngica de los aceites esenciales se determinoÌ por el ensayo de exposicioÌn a los vapores frente a los hongos fitopatoÌgenos Sclerotinia sclerotiorum, Sclerotium rolfsii y Rhizoctonia solani. El aceite esencial de L. turbinata mostroÌ una potente actividad antifuÌngica frente al panel de hongos ensayados, mientras que el aceite de L. integrifolia inhibioÌ significativamente el crecimiento micelial de S. rolfsii y R. solani.