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http://dx.doi.org/10.12791/KSBEC.2019.28.3.265

Effect of LED and QD-LED(Quantum Dot) Treatments on Production and Quality of Red Radish(Raphanus sativus L.) Sprout  

Choi, In-Lee (Division of Horticulture and Systems Engineering, Program of Horticulture, Kangwon National University)
Wang, Lixia (Division of Horticulture and Systems Engineering, Program of Horticulture, Kangwon National University)
Lee, Ju Hwan (Division of Horticulture and Systems Engineering, Program of Horticulture, Kangwon National University)
Han, Su Jung (Division of Horticulture and Systems Engineering, Program of Horticulture, Kangwon National University)
Ko, Young-Wook (Cheorwon Plasma Research Institute)
Kim, Yongduk (Cheorwon Plasma Research Institute)
Kang, Ho-Min (Division of Horticulture and Systems Engineering, Program of Horticulture, Kangwon National University)
Publication Information
Journal of Bio-Environment Control / v.28, no.3, 2019 , pp. 265-272 More about this Journal
Abstract
The purpose of this study was to investigate the effects of LED and QD-LED (Quantum Dot) irradiation on seed germination, antioxidant ability, and microbial growth, during red radish (Raphanus sativus L.) sprouts cultivation. Irradiated light was blue, red, blue + red and blue + red + far red (QD-LED) lights, and the controls were a fluorescent lamp (FL), and dark condition. Germination rate of red radish was highest in the dark condition. The plant height and fresh weight of red radish sprouts that irradiated each light for 24 hrs after 7 days growing in dark condition, did not shown significantly difference among treatments. After 24 hrs of light irradiation, cotyledon green was best in blue + red light, and the red hypocotyl was excellent in blue light and QD-LED light. DPPH and phenol contents were high in dark and blue + red light treatment, and anthocyanin content was high in blue light and QD-LED light. Total aerobic counts were similar in all treatments and did not show bactericidal effect, whereas E. coli count was lowest in QD-LED light treatment, and yeast and mold counts were lowest in FL only treatment. Results suggest that when red radish seeds were germinated in dark condition and cultivated for 7 days as sprouts, and then treated with blue light or QD-LED light for 24 hrs, the seeds produced good quality red radish sprouts with greenish cotyledon, reddish hypocotyl, high anthocyanin content, and lower level of E coli contamination.
Keywords
anthocyanin; E. coli; germination rate; radical scavenging ability;
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