Enhancement of anthocyanin content in red radishes (<i>Raphanus sativus</i> L.) by γ-ray irradiation

DOI Web Site 8 References
  • Tsuji Koji
    Graduate School of Pharmaceutical Sciences, Osaka University
  • Tamura Satoru
    Graduate School of Pharmaceutical Sciences, Osaka University
  • Ohno Tomomichi
    Graduate School of Pharmaceutical Sciences, Osaka University Botanical Institute, San-Ei Gen F. F. I., Inc.
  • Koda Takatoshi
    Food Color Division, San-Ei Gen F. F. I., Inc.
  • Murakami Nobutoshi
    Graduate School of Pharmaceutical Sciences, Osaka University

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Other Title
  • γ線照射によるアントシアニン高含有アカダイコンの育種研究
  • Enhancement of anthocyanin content in red radishes (Raphanus sativus L.) by γ-ray irradiation
  • Enhancement of anthocyanin content in red radishes Raphanus sativus L by ガンマ ray irradiation

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Abstract

As a part of our program aiming at breeding red radishes with anthocyanin in high content, effect of γ-ray irradiation against seeds on growth and anthocyanin production was examined. After seeds of red radishes were respectively subjected to irradiation by γ-ray at the intensity of 200 Gy, 400 Gy, and 600 Gy, the three kinds of irradiated seeds and non-irradiated seeds were cultivated from autumn to winter. As a result of minute observation for growth of the red radishes and quantitation of anthocyanin in roots with HPLC, both anthocyanin contents per unit volume and per individual were shown to increase significantly in the 200 Gy treated population with retaining volume of individuals in comparison with the non-treated one. In addition, γ-ray irradiation against seeds with any intensity brought about no apparent alternation on composition of anthocyanins in red radishes. These findings disclose that 200 Gy irradiation by γ-ray would be a promising procedure for breeding red radishes with anthocyanin in high content.

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