Título
Evaluación de Extractos de Plantas Nativas Yucatecas Contra Alternaria chrysanthemi y Espectro de Actividad Antifúngica de Acalypha gaumeri
Autor
MARIA MARCELA GAMBOA ANGULO
Nivel de Acceso
Acceso Abierto
Resumen o descripción
A total of 24 extracts (aqueous and ethanolic)
from nine plant species were evaluated against Alternaria
chrysanthemi, the causal agent of leaf spot of
chrysanthemum. The highest antifungal activity was shown
by ethanolic and aqueous extracts of Acalypha gaumeri root
(Growth inhibition, GI = 75 and 69%, respectively), and by
the aqueous extracts of Bonellia flammea stem and leaf (GI
= 63 and 50%, respectively). These active extracts were
subsequently assessed by agar dilution assay, where
ethanolic extract (EE) of A. gaumeri root caused the highest
inhibition of mycelial growth and sporulation, with a
median Inhibitory Concentration (IC ) of 0.53 mg/mL 50
against A. chrysanthemi GI. This extract was partitioned and
the highest activity was observed in the medium polarity
fraction (ACR-1E), where an IC of 0.13 mg/mL was 50
recorded. This fraction completely inhibited A.
chrysanthemi infection in chrysanthemum leaf, at
concentrations of 85μg/cm2. Also, A. gaumeri extract was
able to inhibit the fungal strains Alternaria sp. (ITC02),
Colletotrichum capsici, Colletotrichum gloeosporioides,
Corynespora cassiicola, Curvularia sp. (ITC10), and
Helminthosporium sp. (ITC04). The EE of A. gaumeri root
may be a potential source of botanical fungicide to control
phytopathogens.
Fecha de publicación
15 de diciembre de 2014
Tipo de publicación
Artículo
Recurso de información
Formato
application/pdf
Repositorio Orígen
Repositorio Institucional CICY
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