Journal
FOOD CHEMISTRY
Volume 108, Issue 2, Pages 633-641Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2007.11.028
Keywords
buckwheat; Fagopyrum tataricm gaertn; trace element water; antioxidant; rutin
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Trace element water (TEW) (100, 200, 300, 400 and 500 ppm) was used to grow buckwheat (Fagopyrum tataricm Gaertn) to evaluate whether the beneficial effects of trace elements on the antioxidant activity could be accomplished with the supplement of TEW. At 300 ppm, TEW significantly increased the Cu, Zn and Fe contents in buckwheat sprout, but not the Se and Mn contents. The levels of rutin, quercitrin and quercetin did not differ between buckwheat sprouts grown in TEW and de-ionized water (DIW). The ethanolic extract from buckwheat sprout grown in 300 ppm TEW showed higher DPPH radical scavenging activity, ferrous ion chelating activity, superoxide anion scavenging activity and inhibitory activity toward lipid peroxidation than that grown in DIW. The extract of the TEW group also enhanced intracellular superoxide dismutase activity and resulted in lower level of reactive oxygen species in human Hep G2 cells. (c) 2007 Elsevier Ltd. All rights reserved.
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