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Free radical-scavenging activity and flavonoid contents of Polygonum orientale leaf, stem, and seed extracts

Jiang Xinyu (College of Chemistry and Chemical Engineering, South Central University, Changsha, PR China)
Chen Xiaoqing (College of Chemistry and Chemical Engineering, South Central University, Changsha, PR China)
Wei Yan (College of Chemistry and Chemical Engineering, South Central University, Changsha, PR China)

The present study was designed to explore the total flavonoid and taxifolin contents and the radical-scavenging activity of 50% ethanol extracts of Polygonum orientale leaves, stems, and seeds by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The extract with higher total flavonoid content has higher radical scavenging activity. Taxifolin (IC50 = 2.83 μmol/L) has antioxidant activity stronger than that of rutin (IC50 = 3.08 μmol/L). The free radical-scavenging potentials of chloroform, ethyl acetate, water, ethanol, and methanol extracts of Polygonum orientale seeds were also investigated. The free radical-scavenging abilities of various extracts were determined as: methanol > ethanol > water > ethyl acetate > chloroform.

This article has been retracted. Link to the retraction 10.2298/ABS181226060E