Results: Among the extracts, TSB showed the highest antioxidant activity followed by TRB, TF and TL. Based on
DPPH and hydroxyl radical scavenging activity, the TSB extract was the most effective one with IC50 37.75 and
58.90 μg/mL, followed by TRB, TF and TL with IC50 40.20 and 102.03; 175.01 and 114.63 and 220.23 and
234.63 μg/mL, respectively. The TSB extract had the most potent inhibitory activity against lipid peroxidation with
IC50 145.31 μg/mL. In addition, the reducing capacity on ferrous ion was in the following order: TSB > TRB > TL >
TF. The content of phenolics, flavonoids, flavonols and proanthocyanidins of TSB was found to be higher than other
extractives.