Abstract
This work aimed to evaluate the nutritional and rheological quality of ora-pro-nobis flour (OPNF) and its influence on the replacement of wheat flour (WF), through the analysis of physicochemical parameters, determination of phenolic compounds, antioxidant activity and rheological analyzes of wheat flour and mixtures with 10 to 30% OPNF. Flour blends with 10%, 20% and 30% of OPNF in substitution of WF in flour base were evaluated. The OPNF showed higher values of lipids (2.87%), proteins (18.29%), fibers (44.13%), ash (11.19%), minerals (Ca, Mg, K, Na, Fe and Zn), beta-carotene (71.37 µg 100 g-1), lycopene (25.02 µg 100 g-1), total chlorophyll (24.40 µg 100 g-1), ABTS radical-scavenging capacity (15.02 μmol Trolox eq. g-1) and DPPH (IC 50 = 33.30 μmol mL-1 extract) in relation to WF. The flour blends with 10%, 20% and 30% of OPNF showed a higher nutritional value and antioxidant activity proportional to the increase on OPNF concentration. The increasing on the concentration of OPNF in flour blends reduced the values of the gluten strength (P), tenacity (W), extensibility (L), water absorption and falling number. Moreover, it increased the values of dough development time, dough stability and water absorption. The results of rheological analyzes indicate that flour blends of OPNF (10%, 20% and 30%) with WF have characteristics suitable for use in biscuits, baked cakes and breads. The data from this study demonstrate the nutritional value and technological potential of OPNF for the development of food products.
Highlights
Pereskia aculeata Miller belongs to the Cactaceae family, native from South and Central America, and is widely distributed from California (USA) to Rio Grande do Sul (Brazil)
The data from this study demonstrate the nutritional value and technological potential of ora-pro-nobis flour (OPNF) for the development of food products
The Pereskia aculeata Miller leaves are non-toxic, and they are considered a source of protein, total dietary fiber, mucilage, vitamins and minerals such as calcium, magnesium, manganese, zinc, and iron
Summary
Pereskia aculeata Miller belongs to the Cactaceae family, native from South and Central America, and is widely distributed from California (USA) to Rio Grande do Sul (Brazil). It is an unconventional food plant (UFP) popularly known as ora-pro-nobis, in Brazil. The inclusion of Pereskia aculeata Miller leaf flour can contribute with bioactive substances (Agostini-Costa et al, 2014; Martin, Freitas, Sassaki, Evangelista, & Sierakowski, 2017; Barbalho et al, 2016) as a healthy and functional option to replace wheat flour and fats that are the main components in several foods. This paper aimed to evaluate the nutritional and rheological quality of OPNF and its influence on the replacement of wheat flour (WF)
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