Specific Expression of the Vacuolar Iron Transporter, TgVit, Causes Iron Accumulation in Blue-Colored Inner Bottom Segments of Various Tulip Petals

- MOMONOI Kazumi MOMONOI Kazumi
- Graduate School of Information Science, Nagoya University
- TSUJI Toshiaki TSUJI Toshiaki
- Horticultural Research Institute, Toyama Prefectural Agricultural, Forestry and Fisheries Research Center
- KAZUMA Kohei [他] KAZUMA Kohei
- Institute of Natural Medicine, University of Toyama
- YOSHIDA Kumi
- Graduate School of Information Science, Nagoya University

Author(s)

- MOMONOI Kazumi MOMONOI Kazumi
- Graduate School of Information Science, Nagoya University
- TSUJI Toshiaki TSUJI Toshiaki
- Horticultural Research Institute, Toyama Prefectural Agricultural, Forestry and Fisheries Research Center
- KAZUMA Kohei [他] KAZUMA Kohei
- Institute of Natural Medicine, University of Toyama
- YOSHIDA Kumi
- Graduate School of Information Science, Nagoya University

Abstract

Several flowers of Tulipa gesneriana exhibit a blue color in the bottom segments of the inner perianth. We have previously reported the inner-bottom tissue-specific iron accumulation and expression of the vacuolar iron transporter, TgVit1, in tulip cv. Murasakizuisho. To clarify whether the TgVit1-dependent iron accumulation and blue-color development in tulip petals are universal, we analyzed anthocyanin, its co-pigment components, iron contents and the expression of TgVit1 mRNA in 13 cultivars which show a blue color in the bottom segments of the inner perianth accompanying yellow- and white-colored inner-bottom petals. All of the blue bottom segments contained the same anthocyanin component, delphinidin 3-rutinoside. The flavonol composition varied with cultivar and tissue part. The major flavonol in the bottom segments of the inner perianth was rutin. The iron content in the upper part was less than that in the bottom segments of the inner perianth. The iron content in the yellow and white petals was higher in the bottom segment of the inner perianth than in the upper tissues. TgVit1 mRNA expression was apparent in all of the bottom tissues of the inner perianth. The result of a reproduction experiment by mixing the constituents suggests that the blue coloration in tulip petals is generally caused by iron complexation to delphinidin 3-rutinoside and that the iron complex is solubilized and stabilized by flavonol glycosides. TgVit1-dependent iron accumulation in the bottom segments of the inner perianth might be controlled by an unknown system that differentiated the upper parts and bottom segments of the inner perianth.

Journal

Bioscience, Biotechnology, and Biochemistry

Bioscience, Biotechnology, and Biochemistry 76(2), 319-325, 2012-02-23

Japan Society for Bioscience, Biotechnology, and Agrochemistry

Codes

NII Article ID (NAID): 10030399884

NII NACSIS-CAT ID (NCID): AA10824164

Text Lang: ENG

Article Type: ART

ISSN: 09168451

NDL Article ID: 023464329

NDL Call No.: Z53-G223

DOI: 10.1271/bbb.110708

Data Source: CJP NDL J-STAGE

Specific Expression of the Vacuolar Iron Transporter, TgVit, Causes Iron Accumulation in Blue-Colored Inner Bottom Segments of Various Tulip Petals

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