IIB   20738
INSTITUTO DE INVESTIGACIONES BIOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
ANTIOXIDANT-POLYPHENOLS IN ANDEAN POTATO VARIETIES OF THE ARGENTINEAN NORTHWEST
Autor/es:
VALIÑAS M; SUAREZ P. A.; DIGILO A.; CLAUSEN A; TEN HAVE A.; ANDREU A.B.
Lugar:
San Luis
Reunión:
Congreso; XLVII Reunión Anual de la Sociedad Argentina de Investigación en Bioquímica y Biología Molecular (SAIB),; 2011
Institución organizadora:
Sociedad Argentina de Investigacion en Bioquímica y Biologia Molecular
Resumen:
Potato, and especially wild germplasm and landraces, produces a variety of secondary metabolites with beneficial effects on human health, among which the antioxidant polyphenols. QTL-assisted breeding allows the introduction of selected genotypic features from native potatoes to processing varieties, directed at the increase of levels of beneficial polyphenols in processing varieties. However, before starting labor-intensive plant breeding programs, a profound knowledge of the regulation of polyphenol production is required. In order to study the polyphenol metabolism, we started a comparative analysis between processing and Andean potatoes. We previously studied the levels of total phenolics and anthocyanins as well as the antioxidant capacity in pulp and peel of tubers of 12 processing potato varieties. The aim of this work is to determine their levels in nine Andean potato varieties. All levels are higher as compared to the levels for processing varieties. The phenolics acid content as well as the antioxidant capacity are higher in peel than in pulp. As expected anthocyanins were only detected in the pigmented varieties. Currently we are determining transcript levels of the key enzymes. Future analyses will also be directed at enzyme characteristics. Taken together these results will be integrated to generate a kinetic model of metabolic network of antioxidant-polyphenols.