Antioxidant activity of phalaenopsis Sogo Yukidian 'V3' plant parts

  • Truong, Ngoc Minh (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Phung, Thi Tuyen (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Do, Tan Khang (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Nguyen, Van Quan (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Pham, Thi Thu Ha (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Nguyen, Thanh Quan (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Andriana, Yusuf (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Truong, Mai Van (Graduate School for International Development and Cooperation, Hiroshima University) ;
  • Tran, Dang Xuan (Graduate School for International Development and Cooperation, Hiroshima University)
  • Published : 2017.06.04

Abstract

Various extracts of roots, stems, and leaves of Phalaenopsis Sogo Yukidian 'V3' were evaluated for total phenolics, total flavonoids, and antioxidant capacity. The conjugate form of stem samples contained the highest total phenolics ($5.092{\pm}0.739mg$ gallic acid equivalent per g dry weight) and the highest total flavonoids ($2.218{\pm}0.021mg$ rutin equivalent per g dry weight) was found in the hexane extract of leaves. The ethyl acetate extract of roots showed the maximum antioxidant activity as compared to other extracts. Of which, the $IC_{50}$ value of this sample were 0.070 mg/mL and 0.450 mg/mL in the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay and reducing power, respectively, while the lipid peroxidation inhibition (LPI) value was as 94.2% by ${\beta}$-carotene bleaching method. Five phenolic compounds including caffeic acid, syringic acid, vanillin, ellagic acid, and cinnamic acid were quantified by high-performance liquid chromatography (HPLC). It is suggested that roots of the hybrid Phalaenopsis Sogo Yukidian 'V3' can be explodited as an effective source of antioxidants.

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