Abstract:
In the present investigation, acetonic extracts from tubers of Tunisian Helianthus Tuberosus L.
were assayed for their chemical composition and antioxidant activity. The phenolic composition
of the acetonic extracts was determined by reverse phase high performance liquid
chromatography (RP–HPLC). The phenolic composition of all extracts was characterized by its
richness in trans-cinnamic acid, flavonose, carnosic acid and warfarin. Total phenolic content
(TPC) measured by the Folin–Ciocalteu assay in Jerusalem artichoke extracts of five ecotypes
ranged from 502.36 ? mol/100 g FW (ecotype 2) to 2640.15 ? mol / 100 g FW (ecotype4). A
positive correlation between total phenols contents and antioxidant activity was recorded for all
ecotypes with the extract of ecotype 4 showed highest antioxidant activity in DPPH radical
scavenging assay (3. 62 ? mol/g MF). Our findings demonstrate that the acetonic extracts of
Helianthus Tuberosus L. possess significant antioxidant activity and may be suggested as a new
potential source of natural antioxidant |
