Abstract
The rhizome of Phragmites communis Trin. is used for vomiting
and belching by clearing stomach and the sprout is used as tea.
Phragmites japonica is similar with P.
communis except the color of sheath is purple. This study is aimed
to compare the in vitro antioxidant activity, total polyphenol
and flavonoids contents of P. communis and P.
japonica. The antioxidant activities of fractions from the two
Phragmites plants were evaluated by
1,1-diphenyl-2-picrylhydrazyl (DPPH) and
2,2’-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical
scavenging assay. The antioxidant activity varied with plant parts and extract
solvents. The fractions of leaf extract from the two Phragmites
plants (4.06± 1.32-16.47±1.28%) showed higher antioxidant
activity by DPPH assay compared with rhizome fractions of two
Phragmites plants
(0.00±0.00-14.15±0.07%), these are lower compared with
ascorbic acid and butylhydroxyanisole (BHA). The highest ABTS radical scavenging
activity was found for rhizome ether fraction, namely 74.95±0.56%
and 73.04±1.85% for P. communis and P.
japonica, these are higher than BHA. The total polyphenol and
flavonoids contents were different with plant parts and extract solvents,
likewise antioxidant activity. A significant correlation was shown between DPPH
and ABTS radical scavenging activity. Considering the results of this study, the
leaves and stems of P. communis and
P. japonica are expected to be used as
natural antioxidants.
Funder
Sunchon National University
Publisher
The Korean Society of Food Preservation