Margarita Miranda¹, José Delatorre-Herrera², Antonio Vega-Gálvez^1,3, Evelyn Jorquera¹, Issis Quispe-Fuentes¹, Enrique A. Martínez^23*

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¹ Department of Food Engineering, Universidad de La Serena, La Serena, Chile.
² Department of Agriculture of Desert and Biotechnology, Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Iquique, Chile.
³ Centro de Estudios Avanzados en Zonas áridas (CEAZA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo and La Serena, Chile.
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Abstract: Antimicrobial potential of quinoa seeds from six diverse seeds, grown in three distinctive geo-graphical zones of Chile, was correlated with their total phenolic content (TPC), total flavonoid content (TFC) and total saponin content (TSC). The six seeds were Ancovinto, Cancosa, Cahuil, Faro, Regalona and Villarrica. A significant influence of quinoa source on chemical composition of seeds was observed. Extracts of all quinoa samples showed antimicrobial activity in the range of 8.3 - 14.8 mm inhibition zone for E. coli and 8.5 - 15.0 mm inhibition zone for S. aureus. Cancosa seeds had the highest antimicrobial action. The TPC and TFC ranged from 3.71 to 16.55 mg GA/100 g d.m. and 7.77 to 14.37 mg QE/100 g d.m., respectively. TSC varied from 1.78 to 3.08 g/100 g d.m. A cor-relation between TFC and antimicrobial activity was found. In conclusion, the six types of quinoa seeds were identified as potential sources of antioxidant compounds and antimicrobial activity.

Keywords: Quinoa, Antimicrobial Activity, Phenols, Flavonoids, Saponin

Cite this paper: Miranda, M. , Delatorre-Herrera, J. , Vega-Gálvez, A. , Jorquera, E. , Quispe-Fuentes, I. and Martínez, E. (2014) Antimicrobial Potential and Phytochemical Content of Six Diverse Sources of Quinoa Seeds (Chenopodium quinoa Willd.). Agricultural Sciences, 5, 1015-1024. doi: 10.4236/as.2014.511110.

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