Comparison of phenolic compositions between common and tartary buckwheat (Fagopyrum) sprouts

Sarker, Md. Zaidul Islam and Kim, Sun-Ju and Suzuki, Tatsuro and Mukasa, Yuji and Hashimoto, Naoto and Takigawa, Sigenobu and Noda, Takahiro and Matsuura-Endo, Chie and Yamauchi, Hiroaki (2008) Comparison of phenolic compositions between common and tartary buckwheat (Fagopyrum) sprouts. Food Chemistry, 110 (4). pp. 814-820. ISSN 0308-8146

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Abstract

The phenolic compositions of non-germinated/germinated seeds and seed sprouts (at 6–10 day-old) of common (Fagopyrum esculentum Möench) and tartary (Fagopyrum tataricum Gaertn.) buckwheats were investigated. Phenolic compounds, including chlorogenic acid, four C-glycosylflavones (orientin, isoorientin vitexin, isovitexin), rutin and quercetin, were determined in the seed sprouts by high-performance liquid chromatography (HPLC). In the edible parts of common buckwheat sprouts, individual phenolics significantly increased during sprout growth from 6 to 10 days after sowing (DAS), whereas in tartary buckwheat sprouts they did not. While the sum contents of phenolic compounds in the edible part (mean 24.4 mg/g DW at 6–10 DAS) of tartary buckwheat sprouts were similar to those of common buckwheat sprouts, rutin contents in the non-germinated/germinated seeds (mean 14.7 mg/g DW) and edible parts (mean 21.8 mg/g DW) of tartary buckwheat were 49- and 5-fold, respectively, higher than those of common buckwheat. Extracts of the edible parts of both species showed very similar free radical-scavenging activities (mean 1.7 μmol trolox eq/g DW), suggesting that the overall antioxidative activity might be affected by the combination of identified phenolics and unidentified (minor) components. Therefore, buckwheat seed sprouts are recommended for their high antioxidative activity, as well as being an excellent dietary source of phenolic compounds, particularly tartary buckwheat sprouts, being rich in rutin.

Item Type:	Article (Journal)
Additional Information:	6605/24861
Uncontrolled Keywords:	Buckwheat sprouts; DPPH assay; Functional food; Phenolic compounds and flavonoids
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Pharmacy > Department of Pharmaceutical Technology
Depositing User:	Professor Md. Zaidul Islam Sarker
Date Deposited:	17 Jan 2013 15:26
Last Modified:	29 May 2014 08:46
URI:	http://irep.iium.edu.my/id/eprint/24861

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