Synchrony between flower opening and petal-color change from red to blue in morning glory, Ipomoea tricolor cv. Heavenly Blue
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- YOSHIDA Kumi
- Graduate School of Information Science, Nagoya University
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- MIKI Naoko
- Graduate School of Information Science, Nagoya University
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- MOMONOI Kazumi
- Graduate School of Information Science, Nagoya University
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- KAWACHI Miki
- Graduate School of Information Science, Nagoya University
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- KATOU Kiyoshi
- Graduate School of Science, Nagoya University
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- OKAZAKI Yoshiji
- Department of Biology, Osaka Medical College
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- UOZUMI Nobuyuki
- Graduate School of Engineering, Tohoku University
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- MAESHIMA Masayoshi
- Graduate School of Bioagricultural Sciences, Nagoya University
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- KONDO Tadao
- Graduate School of Information Science, Nagoya University Graduate School of Bioagricultural Sciences, Nagoya University
Bibliographic Information
- Other Title
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- Synchrony between flower opening and petal-color change from red to blue in morning glory, Ipomoea tricolor cv
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Abstract
Petal color change in morning glory Ipomoea tricolor cv. Heavenly Blue, from red to blue, during the flower-opening period is due to an unusual increase in vacuolar pH (pHv) from 6.6 to 7.7 in colored epidermal cells. We clarified that this pHv increase is involved in tonoplast-localized Na+/H+ exchanger (NHX). However, the mechanism of pHv increase and the physiological role of NHX1 in petal cells have remained obscure. In this study, synchrony of petal-color change from red to blue, pHv increase, K+ accumulation, and cell expansion growth during flower-opening period were examined with special reference to ItNHX1. We concluded that ItNHX1 exchanges K+, but not Na+, with H+ to accumulate an ionic osmoticum in the vacuole, which is then followed by cell expansion growth. This function may lead to full opening of petals with a characteristic blue color.<br><br>(Communicated by Ryoji NOYORI, M.J.A.)
Journal
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- Proceedings of the Japan Academy, Series B
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Proceedings of the Japan Academy, Series B 85 (6), 187-197, 2009
The Japan Academy
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Details 詳細情報について
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- CRID
- 1390282679124761600
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- NII Article ID
- 130000138066
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- NII Book ID
- AA00785485
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- ISSN
- 13492896
- 03862208
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- NDL BIB ID
- 10266490
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed