The Effect of Quality and Intensity of Light on the Flower-Bud Formation in Morning Glory
The Effect of Quality and Intensity of Light on the Flower-Bud Formation in Morning Glory
复制标题
光照质量和强度对牵牛花花芽形成的影响
DOI：
10.2525/ecb1963.38.39
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Itsuo Tanaka
中科院分区：
文献类型：
--
作者：
K. Yamazaki;Y. Ishii;Y. Kamuro;Itsuo Tanaka
牵牛花（Pharbitis nil Choisy）在日本的夏季开花。本种是典型的短日照植物。然而，目前还不清楚为什么牵牛花在夏季长日照条件下开花。为了回答这个问题，我们分析了太阳辐射光谱特征的季节变化，发现蓝色分量占光合有效辐射的比例在夏季增加，冬季减少，而绿色则相反，红色分量全年变化不大。在本研究中，我们研究了光质对牵牛花（品种。Murasaki），使用单色光。蓝光下的花芽形成比绿色或红光下早得多。增加蓝光的辐照度和蓝光与绿色光的比例可加速其降解。我们认为，太阳辐射光谱组成的季节变化，特别是蓝色成分的比率，可以控制牵牛花的花芽形成的因素之一。
Flowering of morning glory (Pharbitis nil Choisy) occurs during the summer season in Japan. This species is well-known as a typical short-day plant. It is, however, not clear why morning glory flowers in summer season under long-day conditions. To answer this question, we analyzed the seasonal changes in the spectral characteristics of solar radiation and found that the ratio of blue component to photosynthetically active radiation increased in summer and decreased in winter, whereas the reverse held for green, and that of red did not undergo much changes throughout the year. In the present study, we investigated the effect of light quality on flower-bud formation in morning glory (cv. Murasaki), using monochromatic lights. Flowerbud formation occurred much earlier under blue light than either green or red light. It was accelerated by increasing the irradiance of blue light and the ratio of blue light to green light. We suggest that the seasonal changes in spectral composition of solar radiation, particularly the rate of blue component, can be one of the factors in controlling the flower-bud formation of morning glory.