ANTIOXIDANT POTENTIAL OF FLAVONOIDS EXTRACTED FROM MANGROVE APPLE LEAVES (SONNERATIA CASEOLARIS)

Abstract

Mangrove apple, also called crabapple mangrove, is popular growth in the coastal or riverside areas, especially in saltwater area in Viet Nam. The scientific name is Sonneratia caseolaris (L.) Engl. which belongs to the family of Sonneratiaceae. This study aimed to investigate the antioxidant potential of flavonoids extracted from S. caseolaris leaves. S. caseolaris leaves powder was extracted by ultrasonic method in ethanol 70%, the extract was freeze-dried under reducing pressure then. Total flavonoids were measured and in vitro antioxidant potential of the extract was evaluated by DPPH and ABTS assays. The result showed that total flavonoid contents in the extract was 140,73mg QE/g dried extract. Free radical scavenging activity of the extract to DPPH and ABTS were determined with IC₅₀ = 10.42 ± 0.35µg/mL and 9.63 ± 0.16µg/mL, respectively. These results revealed the antioxidant potential of flavonoids extracted from S. caseolaris leaves. This ability may contribute to helpful effects in the treatment of diseases related to oxidative imbalance conditions in humans.