Determination of Physiological and Harvest Antioxidant Activities of Sunflower Plants Growing in Alkaline Soils with DPPH Method

Abstract

Various methods are employed to evaluate the antioxidant capacities of herbal products and foods. In this study, sunflower widely cultivated in Tekirdag region, Tunca MR(5580) sunflower variety grown in the alkaline soils of the Banarli Village in the Hayrabolu County and antioxidant activities of sunflower plant seeds during physiological and harvest periods were researched. It was compared with Butylated Hydroxy Toluene (BHT), a synthetic antioxidant, which is widely used in the food industry. Antioxidant activity was determined by DPPH method. Free radical scavenging activity of methanol extracts of sunflower was measured by 1,1-diphenyl-2-picryl-hydrazyl using the method. All analysis was run in triplicate and averaged. Physiological period of the examples in the antioxidant activity of 28 %, while in the period of harvest activity as 25 %.