METHOD OF PLANT CULTIVATION

摘要

Formation of a plant pigment is induced in superficial cells of a plant body by irradiating the same with safe light free from exertion of any influence upon the genes of human body or plants. Sprout cultivation is carried out in a dark place, thereby obtaining an etiolated sprout. Plant superficial cells of the resultant etiolated sprout are irradiated with a light emitting diode having a radiation spectrum within the wavelength region of blue light (420 to 490 nm) or UV-A ultraviolet light (320 to 400 nm), so that formation of a plant pigment is induced in the superficial cells, thereby attaining reddening. The light or dark period duration of light irradiation is in the range of 1×10⁴ to 9×10⁴ sec.