Effects of Red and Blue Spectra on Nutritional Quality of Toona sinensis Seedlings

doi:10.3969/j.issn.1000-6362.2015.03.008

Abstract

Abstract: Red light(RL), blue light(BL), red+blue light(R/BL) generated by light-emitting diode were applied, and white light(WL) generated by fluorescent lamps was used as control. The authors studied the effects of different light qualities on nutritional quality (amino acids, Vc, nitrate, crude fiber, total flavonoid and tannin) of Toona sinensis sprouts. The results showed that the treatments of BL and R/BL increased significantly amino acid content of Toona sinensis seedlings compared with the white light treatment, while the RL had the opposite effect. The three spectral quality treatments had the superiority in promoting synthesis and accumulation of Vc in Toona sinensis seedlings, the increase in turn were BL>RL>R/BL. The three treatments of light quality inhibited the accumulation on nitrate of Toona sinensis seedlings, and the strongest inhibition was RL treatment. The crude fiber content of Toona sinensis seedlings was raised under RL, but reduced under BL. Compared with the control, BL and R/BL treatments increased the total flavonoid content of Toona sinensis seedlings, while also reduced the content of tannin. To summarize, BL and R/BL treatments could raise amino acids, Vc and total flavonoid of Toona sinensis seedlings, and could reduce the content of nitrate, crude fiber and tannin at the same time. Therefore, BL and R/BL light could promote nutritional quality of Toona sinensis seedlings.

Key words: LED, Light quality, Toona sinensis seedlings, Nutritious quality

LIU Su hui，ZHANG Li wei. Effects of Red and Blue Spectra on Nutritional Quality of Toona sinensis Seedlings[J]. Chinese Journal of Agrometeorology, 2015, 36(03): 306-312.

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