Antioxidant capacity and total phenolic contents in hydrophilic extracts of selected Bangladeshi medicinal plants.
Mo kle
Abstrè
OBJECTIVE
To evaluate hydrophilic extracts from edible portions of fifteen plants for total phenolic content (TPC) and anti-oxidant capacity (AC) as an effort to find possible sources for future novel antioxidants.
METHODS
Folin-Ciocalteau and DPPH radical scavenging assays were employed to determine TPC and AC, respectively.
RESULTS
Among the assayed plants, TPC (mean±SD), expressed as gallic acid equivalent, varied from 0.04±0.01 (Amaranthus spinosus) to 6.01±0.04 (Zanthoxylum rhetsa) mg gallic acid equivalent/g fresh weight. AC (mean±SD), expressed as trolox equivalent, ranged from 0.14±0.00 (Alternanthera philoxeroides) to 7.54±0.00 (Zanthoxylum rhetsa) μmol trolox equivalent/g fresh weight. A significant and positive linear relationship (R(2)=0.99) was observed between TPC and AC of Zanthoxylum rhetsa, Oxalis corymbosa, and Alternanthera sessilis.
CONCLUSIONS
The results of the present study implies that the analyzed plants possess varying degree of antioxidant capacity and, therefore, the antioxidant potency of these underused plants may be utilized to prevent oxidative damage and oxidative stress related disorders.
