Antifeedant activity of ethanolic extract from Flourensia oolepis and isolation of pinocembrin as its active principle compound

Díaz Napal, Georgina ORCID: https://orcid.org/0000-0003-2440-2488, Carpinella, María Cecilia ORCID: https://orcid.org/0000-0001-5553-1851 and Palacios, Sara María (2009) Antifeedant activity of ethanolic extract from Flourensia oolepis and isolation of pinocembrin as its active principle compound. Bioresource Technology, 100 (14). pp. 3669-3673. ISSN 09608524

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Resumen

The ethanolic extract from Flourensia oolepis aerial parts showed strong antifeedant activity against the pest larvae, Epilachna paenulata, with an antifeedant index (AI%) of 99.1% at 100 μg/cm2. Based on chromatographic fractionation of the extract, guided by bioassays on E. paenulata, the flavanone pinocembrin (1) was isolated as the most active principle. In a choice assay, compound 1 showed strong antifeedant activity against E. paenulata, Xanthogaleruca luteola and Spodoptera frugiperda with an AI% of 90, 94 and 91% (p < 0.01) respectively, at 50 μg/cm2. The dosages necessary for 50% feeding inhibition of the insects (ED50) were 7.98, 6.13 and 8.86 μg/cm2, respectively. The feeding inhibitory activity of 1 against E. paenulata was compared with the activity of other structurally related flavonoids like naringenin, which was inactive up to 100 μg/cm2, catechin which was nearly 6 times less active than 1, and quercetin which was equally active as 1. The effect of these on the feeding behavior of E. paenulata was also studied.

Tipo de documento:	Artículo
DOI:	https://doi.org/10.1016/j.biortech.2009.02.050
Palabras clave:	Antifeedant. Asteraceae. Flavonoids. Flourensia oolepis. Pinocembrin.
Temas:	Q Ciencia > QD Química
Unidad académica:	Universidad Católica de Córdoba > Facultad de Ciencias Químicas
Google Académico:	Ver citaciones
URI:	http://pa.bibdigital.ucc.edu.ar/id/eprint/4935

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