scholarly journals Possibility of Harvesting June-bearing Strawberries in a Plant Factory with Artificial Light during Summer and Autumn by Re-using Plants Cultivated by Forcing Culture

2021 ◽  
Vol 59 (2) ◽  
pp. 99-105
Author(s):  
Tomoe IWAO ◽  
Takuya MURAKAMI ◽  
Osamu AKABOSHI ◽  
Hnin Yin CHO ◽  
Masaaki YAMADA ◽  
...  
Keyword(s):  
Artificial Light ◽  
Plant Factory ◽  
Forcing Culture

scholarly journals End-Of-Day LED Lightings Influence the Leaf Color, Growth and Phytochemicals in Two Cultivars of Lettuce

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1475 ◽  
Author(s):  
Yamin Li ◽  
Rui Shi ◽  
Haozhao Jiang ◽  
Linyuan Wu ◽  
Yiting Zhang ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
White Light ◽  
Growth Stage ◽  
Dark Period ◽  
Red Light ◽  
Shoot Biomass ◽  
Artificial Light ◽  
Ultraviolet A ◽  
Leaf Color ◽  
Plant Factory

Four light treatments (W: white light; EOD-B: end-of-day enhanced blue light; EOD-FR: end-of-day supplementary far-red light; EOD-UV: end-of-day supplementary ultraviolet-A light) were designed to explore the effects of end-of-day (EOD) lightings (30 min before dark period) on leaf color, biomass and phytochemicals accumulation in two lettuce cultivars (Lactuca sativa cv. ‘Red butter’ and ‘Green butter’) in artificial light plant factory. EOD-FR stimulated the plant and shoot biomass of two cultivars, and EOD-B suppressed the growth of ‘Red butter’ but induced higher biomass in ‘Green butter’. EOD lightings generated brighter, greener and yellower leaf in ‘Red butter’ at harvest, but the highest lightness and the deepest redness of ‘Green butter’ leaf were observed in the middle growth stage. ‘Red butter’ had prominent higher contents of chlorophylls and carotenoids, while these pigments showed less sensitivity to the interaction of cultivars and EOD lightings. EOD lightings impeded the accumulation of anthocyanin in two cultivars, except EOD-UV slightly increased the anthocyanin contents in ‘Green butter’. EOD-UV strengthened the antioxidant capability of ‘Green butter’, but EOD lightings had different effects on the antioxidant and nutritional compound contents in two lettuce cultivars.

Effect of Artificial Light Sources on Growth and Quality Characteristics of Leaf Lettuce in Closed Plant Factory System

2013 ◽  
Vol 47 (6) ◽  
pp. 23-32 ◽  
Author(s):  
Chang Sun Choi ◽  
◽  
Jun Gu Lee ◽  
Yoon Ah Jang ◽  
Sang Gyu Lee ◽  
...  
Keyword(s):  
Quality Characteristics ◽  
Artificial Light ◽  
Light Sources ◽  
Plant Factory ◽  
Leaf Lettuce

Effects of Artificial Light Sources on Growth and Glucosinolate Contents of Hydroponically Grown Kale in Plant Factory

2016 ◽  
Vol 25 (2) ◽  
pp. 77-82 ◽  
Author(s):  
Guang-Jae Lee ◽  
광재 이 ◽  
Jeong-Wook Heo ◽  
Chung-Ryul Jung ◽  
Hyun-Hwan Kim ◽  
...  
Keyword(s):  
Artificial Light ◽  
Light Sources ◽  
Plant Factory ◽  
Hydroponically Grown

scholarly journals Time-Course of Changes in Photosynthesis and Secondary Metabolites in Canola (Brassica napus) Under Different UV-B Irradiation Levels in a Plant Factory With Artificial Light

2021 ◽  
Vol 12 ◽  
Author(s):  
Jin-Hui Lee ◽  
Seina Shibata ◽  
Eiji Goto
Keyword(s):  
Gene Expression ◽  
Time Course ◽  
Expression Patterns ◽  
Gene Location ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Total Phenolic ◽  
Artificial Light ◽  
Expression Levels ◽  
Plant Factory

This study aimed to evaluate short-duration (24 h) UV-B irradiation as a preharvest abiotic stressor in canola plants. Moreover, we quantified the expression levels of genes related to bioactive compounds synthesis in response to UV-B radiation. Canola seedlings were cultivated in a plant factory under artificial light (200 μmol m–2 s–1 photosynthetic photon flux density; white LED lamps; 16 h on/8 h off), 25°C/20°C daytime/nighttime air temperature, and 70% relative humidity. Eighteen days after sowing, the seedlings were subjected to supplemental UV-B treatment. The control plants received no UV-B irradiation. The plants were exposed to 3, 5, or 7 W m–2 UV-B irradiation. There were no significant differences in shoot fresh weight between the UV-B-irradiated and control plants. With increasing UV-B irradiation intensity and exposure time, the H2O2 content gradually increased, the expression levels of genes related to photosynthesis downregulated, and phenylpropanoid and flavonoid production, and also total phenolic, flavonoid, antioxidant, and anthocyanin concentrations were significantly enhanced. The genes related to secondary metabolite biosynthesis were immediately upregulated after UV-B irradiation. The relative gene expression patterns identified using qRT-PCR corroborated the variations in gene expression that were revealed using microarray analysis. The time point at which the genes were induced varied with the gene location along the biosynthetic pathway. To the best of our knowledge, this is the first study to demonstrate a temporal difference between the accumulation of antioxidants and the induction of genes related to the synthesis of this compound in UV-B-treated canola plants. Our results demonstrated that short-term UV-B irradiation could augment antioxidant biosynthesis in canola without sacrificing crop yield or quality.

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