Comparison of Antioxidant Capacities of the Leaves and Flowers of Salvia fruticosa Grown in Turkey

Abstract

Total phenolic contents, hydroxyl (^•OH) and 2,2-diphenyl-1- picrylhydrazyl (DPPH^•) radicals scavenging, reducing powers and total antioxidant capacities in the leaves and flowers extracts of Salvia fruticosa (Lamiaceae) from Turkey were investigated in vitro. Total phenolic contents of leaves and flowers extracts were determined to be 1.154 ± 0.060 and 0.384 ± 0.015 μg gallic acid/μg, respectively. The highest. OH scavenging capacity was 74 % in presence of 0.174 mg/mL leaves extract. The leaves extracts of S. fruticosa showed higher DPPH^• scavenging with 96.220 % at 2.780 mg/mL as compared with flowers extracts. The reducing powers, ^•OH and DPPH^• scavenging capacities of leaves and flowers extracts of S. fruticosa were concentration dependent and increased with increasing amount of extract sample. Vitamin C equivalences of reducing power values of leaves and flowers extracts in presence of 5.6 μg/mL extracts were determined as 5.937 ± 0.440 and 1.851 ± 0.060 μg/mL, respectively. The reducing effectiveness' on the formation of linoleic acid peroxides were higher in leaves extracts than flowers extracts.