The antioxidant activities of peduncle and fruit extracts were
assessed by different biological and non-biological assays. Consid-
ering the different solvent extracts, methanol extracts of peduncle
and fruit showed excellent scavenging activity against DPPH,
ABTSþ
, phosphomolybdenum, FRAP, superoxide and hydroxyl
radicals assays. Thus, in vitro digestion method was used to deter-
mine the accessibility of antioxidant and acetylcholinesterase in-
hibition activity on methanol extracts.
The decolorization of DPPH solution from purple to pale yellow
color by the plant extracts (antioxidants) confirmed a good anti-
oxidant activity. Considering the sequential solvent extraction,
peduncle (IC50-18.85 m g/mL) and fruit (IC50-11.99 m g/mL) methanol
extracts showed better scavenging activity comparable to that of
reference compounds. In contrast, gastric digested and pancreatic
digested peduncle (IC50-37.66e41.35 m g/mL) and fruit
(IC50 ¼ 18.21e26.17 m g/mL) methanol extracts showed decreased
level of anti-DPPH activity (Fig. 2a).
Trolox equivalents antioxidant capacity (TEAC) of the P. loureirii
was shown in Table 2 and its activity was determined by ABTSþ
assay. Among the different solvent extracts, a strong activity was
found in the peduncle and fruit methanol extracts and was.