The highest total flavonoids content was determined in the

Total flavonoids, total phenols and antioxidant properties of essential oils and of solvent extracts from S. rigidum together with reference standards evaluated via ABTS, DPPH and FRAP assays shown as mean ± standard deviation.Part of plantSolventABTS (μg/mL trolox equivalents)DPPH (SC50 (mg/mL))FRAP (μg ascorbic acid/mg dry extract)Total flavonoids (rutin equivalent μg/mg dry extract)Total phenols (gallic SU11274 equivalent μg/mg dry extract)ExtractsRootHexane12.99 ± 0.32150.72 ± 1.85555.49 ± 2.110.00a10.09 ± 0.30Ether9.82 ± 0.24135.57 ± 1.54214.49 ± 4.250.64 ± 0.0123.72 ± 0.70Ethyl-acetate9.02 ± 0.22195.43 ± 2.01332.34 ± 2.620.57 ± 0.0164.97 ± 1.92Acetone8.02 ± 0.20111.79 ± 0.98652.64 ± 12.934.01 ± 0.18151.03 ± 4.47Methanol3.67 ± 0.07189.65 ± 2.06442.00 ± 8.750.76 ± 0.0114.70 ± 0.43LeafHexane12.57 ± 0.31230.82 ± 2.58463.27 ± 1.250.00a56.96 ± 1.68Ether6.68 ± 0.1696.15 ± 1.02213.62 ± 0.270.68 ± 0.011.86 ± 0.05Ethyl-acetate2.94 ± 0.07311.78 ± 8.25595.85 ± 1.900.18 ± 0.013.96 ± 0.12Acetone3.00 ± 0.07203.41 ± 3.27136.88 ± 2.710.52 ± 0.0110.98 ± 0.32Methanol1.74 ± 0.04159.20 ± 1.48786.85 ± 15.583.13 ± 0.066.31 ± 0.19FlowerHexane11.20 ± 0.28378.00 ± 6.07191.22 ± 1.810.00a19.22 ± 0.57Ether8.81 ± 0.22187.60 ± 2.19136.76 ± 0.733.10 ± 0.061.34 ± 0.04Ethyl-acetate3.10 ± 0.08426.81 ± 6.11181.23 ± 1.610.08 ± 0.013.92 ± 0.12Acetone10.14 ± 0.2578.19 ± 0.85546.84 ± 14.795.78 ± 0.1187.28 ± 2.58Methanol2.14 ± 0.05112.43 ± 0.98698.95 ± 19.783.73 ± 0.0721.84 ± 0.65FruitHexane9.87 ± 0.24167.20 ± 0.88556.84 ± 11.030.00a10.94 ± 0.32Ether5.74 ± 0.14106.24 ± 0.39128.24 ± 2.540.76 ± 0.0212.60 ± 0.37Ethyl-acetate4.37 ± 0.11127.72 ± 1.05320.25 ± 6.340.15 ± 0.0110.20 ± 0.30Acetone3.22 ± 0.08180.28 ± 2.25117.55 ± 0.350.98 ± 0.023.09 ± 0.09Methanol3.00 ± 0.07116.96 ± 7.98228.39 ± 4.528.27 ± 0.1663.28 ± 1.87Essential oilsRoot–2.05 ± 0.19302.40 ± 8.65115.25 ± 2.03––Leaf–1.47 ± 0.17224.00 ± 3.3131.32 ± 0.52––Flower–0.74 ± 0.05257.51 ± 2.4530.75 ± 0.83––Fruit–0.67 ± 0.03217.84 ± 3.5147.89 ± 1.02––Reference substancesBHTMethanol3.45 ± 0.1716.51 ± 0.3670.30 ± 0.41––TroloxMethanol–1.50 ± 0.0950.04 ± 0.21––Ascorbic acidWater2.78 ± 0.280.56 ± 0.02–––RutinMethanol3.34 ± 0.141.43 ± 0.1190.71 ± 0.38––Gallic acidWater3.02 ± 0.110.29 ± 0.0170.58 ± 0.28––aValues of content of flavonoids in the extinction hexane extract were close to zero due to the insolubility of flavonoids in hexane as the non-polar solvent.Full-size tableTable optionsView in workspaceDownload as CSV