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Stability of flower colors due to anthocyanin-flavone copigmentation in Japanese garden iris, Iris ensata Thunb.

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Abstract

The fading of flower color in bluish purple and reddish purple cultivars of Iris ensata and the in vitro stability of malvidin 3RGac5Gand petunidin 3RGac5G due to copigmentation with isovetixin under different pH conditions were examined. The bluish purple cultivars exhibited higher flower color stability than the reddish purple cultivars 2 days after anthesis. In the absence of isovitexin, malvidin 3RGac5G and petunidin 3RGac5G were not able to maintain color stability except at low pH. However, the color stability of malvidin 3RGac5G and petunidin 3RGac5G was increased by copigmentation with isovitexin under all pH conditions tested. Most remarkable was the stabilization of both anthocyanins due to the copigmentation at pH 4.2–6.2. Therefore, it can be concluded that the stability of flower color in the bluish purple cultivars of malvidin 3RGac5Gand petunidin 3RGac5G type of I. ensata is caused at least in part by the copigmentation between these anthocyanins and isovitexin.

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Authors and Affiliations

  1. Applied Genetics and Biotechnology Division, Faculty of Agriculture, Miyazaki University, Miyazaki, 889-2192, Japan

    T. Yabuya & M. Saito

  2. Tsukuba Botanical Garden, National Science Museum, Tsukuba, 305-0005, Japan

    T. Iwashina

  3. Department of Food Science and Technology, Minami-Kyushu University, Takanabe, Miyazaki, 884-0003, Japan

    M. Yamaguchi

Authors
  1. T. Yabuya
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  2. M. Saito
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  3. T. Iwashina
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  4. M. Yamaguchi
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Yabuya, T., Saito, M., Iwashina, T. et al. Stability of flower colors due to anthocyanin-flavone copigmentation in Japanese garden iris, Iris ensata Thunb.. Euphytica 115, 1–5 (2000). https://doi.org/10.1023/A:1003916417168

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  • DOI: https://doi.org/10.1023/A:1003916417168

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