Influence of genotype and harvest year on polyphenol content and antioxidant activity in murtilla (Ugni molinae Turcz) fruit
2013
Alfaro, S(Universidad de La Frontera Programa de Doctorado en Ciencias de Recursos Naturales) | Mutis, A(Universidad de La Frontera Departamento de Ciencias Químicas y Recursos Naturales Laboratorio de Ecología Química) | Palma, R(Universidad de La Frontera Departamento de Ciencias Químicas y Recursos Naturales Laboratorio de Ecología Química) | Quiroz, A(Universidad de La Frontera Departamento de Ciencias Químicas y Recursos Naturales Laboratorio de Ecología Química) | Seguel, I(Instituto de Investigaciones Agropecuarias, INIA-Carillanca) | Scheuermann, E(Universidad de La Frontera Chemical Engineering Department ,Universidad de La Frontera Center of Food Biotechnology and Bioseparations)
Polyphenol content and antioxidant activity in murtilla (Ugni molinae Turcz) fruit from three genotypes (the 14-4 genotype and the Red Pearl-INIA and South Pearl-INIA varieties) were studied over five growing seasons. Our results showed significant differences in total polyphenol content among yearly harvests. The lowest value (283 ± 72 mg GAE/100 g dw) was obtained for the 14-4 genotype in the 2008 harvest, and the highest value (2,152 ± 290 mg GAE/100 g dw) was observed for the variety South Pearl-INIA in 2007. The lowest value for antioxidant activity (2,234 ± 337 μmol TE/100 g dw) was obtained for the Red Pearl-INIA variety in 2008, and the highest value (4,073 ± 76 μmol TE/100 g dw) was observed for the 14-4 genotype in 2007. There was a significant effect of genotype and growing season on polyphenol content, antioxidant activity and dry matter content for the murtilla fruits evaluated in this study, but additional studies examining other abiotic and biotic factors are required to fully explain causality.
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