title: Evaluation of antioxidant activities and chemical characterisation of staghorn sumac fruit (Rhus hirta L.).
abstract: Staghorn sumac (Rhus hirta L.) is a native tree in Eastern Canada whose fruit has been used by aboriginal peoples to treat various illnesses, and has recently been found to be a good source of antioxidants. However, the phytochemical composition of R. hirta is not known. In this study, we used Four highly accepted assays and confirmed its FRAP, ORAC, β-CLAMS and PCL values to be 79.95 μmol AAE/g DW, 1544 μmol TE/g DW, RAA 129% and 4513 μmol TE/g DW, respectively. The antioxidant activities correlated positively to the total polyphenols content, which was higher in the ethanolic extract (81.6 mg GAE/ g DW) compared to the water extract (46.3mg GAE/g DW), suggesting polyphenols play an important role. Quantitative data from UHPLC and qualitative studies using HPLC-DAD-MS showed that in addition to commonly found phenolic acids, flavonoids and anthocyanins, R. hirta fruit contained a novel group of unique anthocyanins with aglycones (anthocyanidins) at 449, 419 and 433 Da. Further studies on the identification and their health beneficial effects are being conducted.
authors: Guelph Food Research Centre, Agriculture and Agri-Food Canada, 93 Stone Road West, Guelph, Ontario, Canada.
authors: Tao
authors: T
authors: Wu
authors: Jason L
authors: JL
authors: McCallum
authors: Sunan
authors: S
authors: Wang
authors: Ronghua
authors: R
authors: Liu
authors: Honghui
authors: H
authors: Zhu
authors: Rong
authors: R
authors: Tsao
mesh_terms: D000872:Anthocyanins / Q000737:chemistry; D000975:Antioxidants / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D059808:Polyphenols / Q000737:chemistry*; D029045:Rhus / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D010936:Plant Extracts; D059808:Polyphenols