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Effects of light sources on major flavonoids and antioxidant activity in common buckwheat sprouts

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Abstract

It is known that flavonoids in sprouts were accumulated more under light irradiation than under dark. Light source affecting flavonoid accumulation in sprouts is still investigating. We evaluated the effects of light sources, including red, blue and fluorescent lights, on the flavonoid accumulation and antioxidant activity in common buckwheat sprouts. Experimental results showed that blue light significantly enhanced the contents of C-glycosylflavones, including orientin, vitexin and their isomers, and rutin and a rutin isomer. Sprouts grown under blue light exhibit also the highest total phenolics and total flavonoids as well as the highest antioxidant activities. It was found that isoorientin is the highest antioxidant flavonoid whereas numerous former studies suggested that rutin is a typical antioxidant compound in common buckwheat. These results indicated that blue light could be applied for enhancing not only the content of flavonoids but also antioxidant activity in common buckwheat sprouts.

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Acknowledgements

This study was supported by a grant from the Individual Basic Science and Engineering Research Program, National Research Foundation of Korea, Republic of Korea (Grant No. NRF-2014R1A1A2058838).

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Authors and Affiliations

  1. Korea Food Research Institute, Seongnam, 13539, Korea

    Tae Gyu Nam

  2. Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, Korea

    Dae-Ok Kim

  3. Department of Horticultural Biotechnology, Kyung Hee University, Yongin, 17104, Korea

    Seok Hyun Eom

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  1. Tae Gyu Nam
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  2. Dae-Ok Kim
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Correspondence to Seok Hyun Eom.

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Nam, T.G., Kim, DO. & Eom, S.H. Effects of light sources on major flavonoids and antioxidant activity in common buckwheat sprouts. Food Sci Biotechnol 27, 169–176 (2018). https://doi.org/10.1007/s10068-017-0204-1

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  • DOI: https://doi.org/10.1007/s10068-017-0204-1

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