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首页> 美国卫生研究院文献>Proceedings of the Japan Academy. Series B Physical and Biological Sciences >Synchrony between flower opening and petal-color change from red to blue in morning glory Ipomoea tricolor cv. Heavenly Blue
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Synchrony between flower opening and petal-color change from red to blue in morning glory Ipomoea tricolor cv. Heavenly Blue

机译：牵牛花三色堇菜的花开放与花瓣颜色之间的同步从红色变为蓝色。天蓝

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摘要

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.
机译：牵牛花番薯三色简历中的花瓣颜色变化。花朵开放期间，天堂红（从红色变为蓝色）是由于有色表皮细胞中液泡pH（pHv）从6.6异常升高到7.7。我们阐明，pHv的增加与液泡膜局部Na + / H + 交换器（NHX）有关。然而，pHv增加的机制和NHX1在花瓣细胞中的生理作用仍然不清楚。在这项研究中，特别参考ItNHX1，研究了花瓣颜色从红色到蓝色的变化，pHv增加，K + 积累以及开花期间细胞膨胀生长的同步性。我们得出的结论是，ItNHX1与H + 交换K + ，而不与Na + 交换，以在液泡中积累离子渗透液，然后进行后续操作通过细胞扩增生长。此功能可能会导致具有特征性蓝色的花瓣完全张开。

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