African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

In vitro antifungal activity of polyphenols-rich plant extracts against Phytophthora cinnamomi Rands

Francisco Castillo-Reyes
  • Francisco Castillo-Reyes
  • Saltillo Experimental Station, Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias, Buenavista, 25315, Saltillo, Coahuila, México.
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Francisco Daniel Hernández-Castillo
  • Francisco Daniel Hernández-Castillo
  • Department of Agricultural Parasitology, Universidad Autónoma Agraria Antonio Narro, Buenavista, 25315, Saltillo, Coahuila, México.
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Julio Alberto Clemente-Constantino
  • Julio Alberto Clemente-Constantino
  • Department of Agricultural Parasitology, Universidad Autónoma Agraria Antonio Narro, Buenavista, 25315, Saltillo, Coahuila, México.
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Gabriel Gallegos-Morales
  • Gabriel Gallegos-Morales
  • Department of Agricultural Parasitology, Universidad Autónoma Agraria Antonio Narro, Buenavista, 25315, Saltillo, Coahuila, México.
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Raúl Rodríguez-Herrera
  • Raúl Rodríguez-Herrera
  • Department of Food Research, School of Chemistry, Universidad Autónoma de Coahuila, 25000, Saltillo, Coahuila, Mexico.
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Cristóbal Noé Aguilar
  • Cristóbal Noé Aguilar
  • Department of Food Research, School of Chemistry, Universidad Autónoma de Coahuila, 25000, Saltillo, Coahuila, Mexico.
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  •  Received: 11 October 2015
  •  Accepted: 20 October 2015
  •  Published: 10 December 2015

Abstract

Antifungal activity of water, ethanol, lanolin and cocoa butter plant extracts derived from seven Mexican Chihuahuan desert inhabiting plant species (Larrea tridentata, Flourensia cernua, Agave lechuguilla, Opuntia ficus-indica, Lippia graveolens, Carya illinoensis and Yucca filifera) were evaluated against Phytophthora cinnamomi. All plant extracts were active against Phytophthora cinnamomi. Two (L. tridentata and F. cernua) out of seven plant species tested had the optimal antifungal activity against this fungus specie, with minimum inhibitory concentration (MIC) values as low as 6.96 and 8.6 mg/L. Some of the plant extracts had moderate to low activity against P. cinnamomi, and the variations of active polyphenolic (condensed and hydrolysable tannins) compounds in the plant extracts estimated via colorimetric methods indicated that the inhibitory activity may not based on a general metabolic toxicity but perhaps the antifungal potency is conferred by group or groups of toxic metabolites. Based on the antifungal activity, crude plant extracts may be a cost effective way of protecting crops against P. cinnamomi. Because plant extracts contain several antifungal compounds, the development of resistant pathogens to these plant extracts may be delayed.

Key words: Antifungal activity, plant extracts, polyphenols, MIC50 P. cinamomi.