Abstract
Sweet potato (Ipomoea batatas (L.) Lam.) is a plant with great importance in food security, especially in developing countries. Grown in more than 100 countries, it is nutritious and contains high levels of dietary fiber, minerals such as iron and vitamins A, B and C. The aim of this study was to evaluate the antioxidant activity of two cultivars of yellow sweet potatoes Beauregard (biofortified) and Carrot (organic). The ORAC, ABTS and DPPH assays were used to determine the antioxidant activity of raw, bleached and dried sweet potatoes at 40, 50 and 60 o C. The results showed that ORAC assay revealed the highest values for antioxidant activity in all conditions of Beauregard and cv. Carrot were tested. Both cultvars can be be use to elaborate functional products as supplements among others. contributing to the consumption of pro-vitamin A rich foods.
Highlights
Sweet potato (Ipomoea batatas (L.) Lam.) is a plant with great importance in food security, especially in developing countries
The biofortified yellow sweet potato, cultivar Beauregard were cultivated at Embrapa Hortaliças (CNPH), Brasília (DF) and sent to the Food Technology and Instrumental Analysis Laboratory, Federal University of Rio de Janeiro and to Embrapa Food Technology, Rio de Janeiro, for experiments and analysis (Figure 1)
The samples of organic yellow sweet potato, cultivar Carrot were acquired at the organic products market held weekly at the Health Sciences Center of the Federal University of Rio de Janeiro (Figure 2)
Summary
Sweet potato (Ipomoea batatas (L.) Lam.) is a plant with great importance in food security, especially in developing countries. Its fresh roots and leaves can be consumed in human and animal food. It is an industrial raw material in the production of flours, sweets, natural pigments (yellow sweet potatoes and others), animal feed and a variety of starch-based products (Zhang et al, 2016) and ranks the fourth place among the most cultivated vegetables in Brazil. Great capacity for climatic adaptation and high energy production per unit of time give an economic and social importance. To promote the improvement of this condition, in addition to the adequacy of production technology, it is necessary to adopt more productive cultivars (Silva et al, 2015) as yellow, yellow, purple sweet cultivars as well as biofortified cultivars with have high antioxidant capacity as well good souces of β-carotene and other bioactive compounds (Murphy et al, 1975)
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