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. 2012 Aug 13;17(8):9668-82.
doi: 10.3390/molecules17089668.

Evaluation of flavonoid contents and antioxidant capacity of the aerial parts of common and tartary buckwheat plants

Danuta Zielińska  1 , Marcin Turemko, Jacek Kwiatkowski, Henryk Zieliński
Affiliations

Evaluation of flavonoid contents and antioxidant capacity of the aerial parts of common and tartary buckwheat plants

Danuta Zielińska et al. Molecules. .

Abstract

The analysis of major and minor flavonoids, and antioxidant capacity of stems, leaves, flowers, unripe seeds and ripe seeds of common and tartary buckwheat plants collected during different growth periods was addressed in this study. The highest rutin contents were observed in flowers and leaves collected from common and tartary buckwheat at early flowering as well as flowering and seed formation states. A low quercetin contents were found in all studied aerial part of buckwheat plants. Quercitrin (quercetin-3-rhamnoside) was only found in flowers collected at different growth periods while flavone C-glucosides were accumulated preferentially only in unripe seeds collected from common buckwheat at an early flowering state. The rank of antioxidant capacity provided for aerial parts of common and tartary buckwheat at early flowering state was as follows: flowers > leaves > stems. The highest contribution of rutin to the antioxidant capacity of the aerial parts of common and tartary buckwheat was found for stems followed by leaves, flowers and unripe seeds. The results demonstrate that flowers from common and tartary buckwheat collected at early flowering as well as flowering and seed formation states have the future potential to be a useful food ingredient.

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Figures

Figure 1
Figure 1
The chemical structure of buckwheat flavonoids.
Figure 2
Figure 2
The content of flavone C-glucosides in the unripe and ripe seeds of common buckwheat harvested at 48 and 100 DAS, respectively (% DW).
Figure 3
Figure 3
The contribution of rutin to the antioxidant capacity of the aerial parts of common and tartary buckwheat provided by: (a) DPPH assay; (b) PCL assay.
See this image and copyright information in PMC

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