Journal of the Japanese Society for Horticultural Science
Online ISSN : 1880-358X
Print ISSN : 0013-7626
ISSN-L : 0013-7626
Studies on the Coloration of Carnation Flowers
III. The Effect of Light Quality on the Anthocyanin Formation in Detached Petals
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1975 Volume 43 Issue 4 Pages 443-448


Effect of light quality was investigated on the anthocyanin formation in detached carnation petals cultured using 4% sucrose liquid medium in vitro for 18 days. The cultures were treated with artificial light in all cases, and the results obtained are summarized in the following.
1. When the detached petals were irradiated with various pure colored fluorescent lamps, anthocyanin formation in the petals was more stimulated in the irradiation with fluorescent lamps than in darkness, and its content was highest under either red or blue light, becoming gradually lower in the order of orange, yellow and green lights.
2. The irradiation of far-red light at either short or long period gave rise to a markedly increased content of anthocyanin as compared with darkness.
3. The petals showed the formation of anthocyanin at a higher level when irradiated not only with light from white fluorescent lamp but also with a mixed light from red and blue ones than when irradiated alone with red or blue fluorescent lamp.
4. As to the irradiation with ultraviolet ray, anthocyanin formation in the petals was suppressed by its shorter wavelength region, and not promoted even by its longer wavelength region.

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