Compuestos fenólicos y capacidad antioxidante en el alga invasora Undaria pinnatifida de Patagonia, como materia prima para la producción de alimento

MARGUET, ROGELIO; DELLATORRE, FERNANDO G.; CORVALAN, SORAYA; SOLANA, VALERIA; VALLEJOS, MARISOL

Sao Paulo

Simposio; VII Simposio de control de qualidade do pescado; 2016

Instituto de Pesca do Brasil

The brown seaweed Undaria pinnatifida, native to Asia, has become an invasive species in Argentina, but also a potential exploitable resource. Undaria pinnatifida is one of the three species of macroalgae widely used as a resource from wild and farmed populations (FAO 2011). It is used worldwide with a variety of purposes but the main use is as human food in different wakame and mekabu products. However there are few references about concentration of phenolic compounds and antioxidant power. This paper analyzes the concentration of total phenolic compounds and antioxidant capacity of the different tissues of Undaria pinnatifida throughout the harvest season (4 months) as raw material for food production. The mean concentration of total phenolic compounds (expressed as mg of gallic acid equivalent in 100 g of dry weight) did not change in relation to time but was higher in the sporophyll (423) than in the blade (161) and the midrib (93). The antioxidant capacity (analyzed by DPPH and ABTS techniques and expressed in mg of ascorbic acid equivalent in 100 grams of dry sample) did not change in relation to time. The values recorded with both techniques were similar and slightly higher in the sporophyll than in the blade and the midrib.