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Rutin and flavonoid contents in three buckwheat species Fagopyrum esculentum, F. tataricum, and F. homotropicum and their protective effects against lipid peroxidation
- Jiang, P., Burczynski, F., Campbell, C., Pierce, G., Austria, J.A., Briggs, C.J.
- Food research international 2007 v.40 no.3 pp. 356-364
- Fagopyrum tataricum, rutin, cultivars, lipid peroxidation, plant extracts, Fagopyrum esculentum, low density lipoprotein, antioxidant activity, antioxidants, cholesteremic effect, buckwheat
- This study was conducted to investigate the rutin content of three buckwheat species: Fagopyrum esculentum, Fagopyrum tataricum and Fagopyrum homotropicum, and to evaluate their antioxidant capacity. In total, 11 cultivars/accessions were analyzed. The contents of both rutin and total flavonoids were significantly different depending on species, 0.02% and 0.04% in F. esculentum, 0.10% and 0.35% in F. homotropicum, and 1.67% and 2.04% in F. tataricum, respectively. Three buckwheat species exhibited a dose-response effect in inhibiting low-density lipoprotein (LDL) peroxidation. The antioxidant activity decreased in the order: F. tataricum > F. homotropicum > F. esculentum. Linear regression analysis revealed a correlation between antioxidant activity and rutin content (R2 = 0.98) or total flavonoids content (R2 = 0.77) in all buckwheat cultivars/accessions. This work shows that rutin plays an important role in antioxidant activity of buckwheat seed. It provides useful information for buckwheat breeding to develop high rutin content varieties.