Photo morphogenesis and ginsenoside contents according to LED wavelength and modules for the cultivation of ginseng ( Panax ginseng C. A. Meyer) in plant factories.

摘要

We investigated photo morphogenesis and the contents of ginsenoside, which is an indicator material, according to their wavelengths and modules of LEDs, which are artificial light sources in plant factories. PPFDs (Photosynthetic photon flux densities) were in the range of 200-235 mol.m -2.s -1 at 20 cm while LEDs were irradiating in experiments. In the single wavelength treatment experiments the height of ginseng plants in the treatment group under red wavelengths (670 nm) was 13.5 cm, which was the tallest among all treatment groups; under blue wavelengths (450 nm) there were similar results when compared to the mixed treatment group of blue and red wavelengths. The leaf-length also showed similar results to the height; the leaf-width in the LED treatment groups was wider than the control group. The contents of 7 kinds of ginsenoside (Rg1, Re, Rf, Rb1, Rb2, Rc, and Rd) increased in the red wavelength treatment groups and the mixed treatment group of the red and blue wavelengths. In particular, Rg1 in the R3B2 treatment group was 210% higher than the control group; Rf was 140% higher and Rd was 170% higher. The ginsenoside contents in the mixed group of red and blue wavelengths were higher than the red and blue single wavelength treatment groups, respectively: the more the red wavelength light was intensified, the higher the contents of ginsenoside were. In the LED treatment experiments the height of ginseng plants in four types of LED module treatment groups was greater than that of the control group. However, the significance of these results was not accepted. The results of leaf-length and leaf-width showed similar results to those of the height. The contents of seven kinds of ginsenoside in the LED module treatment groups were higher than the control group. In particular, the contents of Rg1 in the cool white LED module treatment group were 187% higher than the control group and those of Rf were 124% higher. CT International Symposium on New Technologies for Environment Control, Energy-Saving and Crop Production in Greenhouse and Plant Factory - Greensys 2013, Jeju, Korea Republic, 22-27 September 2013.