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- 저자 : Duyen T.P. Nguyen (검색결과 1 건)
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Mizuki Kitayama,Duyen T.P. Nguyen,Na Lu,Michiko Takagaki 한국원예학회 2019 원예과학기술지 Vol.37 No.2
Light quality is a critical factor that affects plant quality, including phytochemical accumulationand marketable characteristics, in closed-type plant production systems. The purpose of this studywas to determine the appropriate light quality for production of good quality water spinach in termsof its appearance and accumulation of phytochemicals in an artificial environment. Plants werehydroponically cultured under five different light quality conditions: red, blue, green, red and blue(as a control), and red and blue with far red at a photosynthetic photon flux density of 200 μmol·m-2·s-1for 14 days after transplantation. Shoot (stem and leaf) fresh weights (FW) under red-containinglight conditions increased more than 39.7% compared to that under monochromatic blue light, andmonochromatic red light produced significantly higher stem FW but lower leaf FW compared tothat under blue-containing light conditions. Monochromatic blue light significantly increased theantioxidant activity capacity in leaves and stems more than 210.0% compared to other treatments. However, blue-containing light significantly stimulated physiological disorder (intumescence injury)in stems and suppressed stem elongation compared to monochromatic red or green light. Monochromaticred light reduced the number of intumescent lesions by 95.8% and enhanced stem elongationcompared to control. These findings suggest that red-rich light promotes growth of water spinachwith less intumescence.
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