Antioxidant indices of red currant cultivars grown in the Sverdlovsk Oblast

Abstract

In this work, nine varieties of red currant cultivars, recognized for use in the Sverdlovsk Oblast, were studied. According to the conducted analysis, the Epsilon cultivar demonstrated the highest antioxidant indicators (mmol/dm3eq) of 13.772 ±0.275. For comparison, the Ilyinka and Luchezarnaya cultivars showed the values of 12.826 ±0.257 and 11.933±0.239, respectively. The late ripening cultivar Zeta showed the lowest antioxidant value of 6.428±0.129 mmol/dm3eq. At the same time, the highest content of flavonoids was characteristic of such red currant cultivars (mg/100 g of edible part, variety) as Epsilon – 50.3±0.9, Beta – 44.2±0.9, Ogni Urala – 45.7±0.9 and Zeta – 17.3±0.3, while the Lychezarnaya cultivar showed the lowest value of 16.1±0.3. In terms of anthocyanins, the highest values (mg of cyanidin-3-glycoside/100 g of edible part) were observed in the Kapitalina, Ilyinka and Lychezarnaya cultivars, equalling 29.1±0.6, 38.1±0.7 and 41.2±0.8, respectively. The average ripening cultivar Alaya Zorka showed the lowest anthocyanin value of 11.9±0.2. The Kapitalina, Ilyinka and Luchezarnaya cultivars demonstrated the highest amounts of phenolic substances (mg of gallic acid/100 g of edible part) of 212.9±4.3, 235.1±4.7 and 168.3±3.3, respectively. In terms of this indicator, the Beta cultivar showed the lowest value of 114.1±2.3. The consumer characteristics of the cultivars were studied, including their acidity, as well as the content of total and reducing sugars. The obtained results can be used when selecting dietary supplements based on red currant berries and determining the nutritional value of diets in order to increase their overall antioxidant activity.