scholarly journals Effect of EC of nutrient solution and light condition on transpiration and tipburn injury of lettuce in a plant factory.

1989 ◽  
Vol 44 (4) ◽  
pp. 253-258 ◽  
Author(s):  
Jung Eek SON ◽  
Tadashi TAKAKURA
Keyword(s):  
Nutrient Solution ◽  
Light Condition ◽  
Plant Factory

scholarly journals Flavonoid Productivity Optimized for Green and Red Forms of Perilla frutescens via Environmental Control Technologies in Plant Factory

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Na Lu ◽  
Michiko Takagaki ◽  
Wataru Yamori ◽  
Natsuko Kagawa
Keyword(s):  
Light Intensity ◽  
Nutrient Solution ◽  
Environmental Control ◽  
Total Yield ◽  
Perilla Frutescens ◽  
Leafy Vegetables ◽  
Plant Materials ◽  
Environmental Treatment ◽  
Plant Factory ◽  
Control Technologies

Perilla frutescens (Lamiaceae) is a dietary staple in Asia. It is an abundant source of flavonoids that are bioactively beneficial to human health and fitness. The current popularity of plant-based consumption is being driven by the healthful benefits of bioactive nutrition, and the concentration of bioactive agents found in raw plant materials is an important factor in the assessment of food quality. To test the feasibility of promoting flavonoid productivity in perilla plants via environmental treatment, plant factory technology was applied to perilla plant cultivation. Apigenin (AG) and luteolin (LT) are two of the most potent anticarcinogenic flavonoids in perilla, and these are also found in many vegetables and fruits. Quantitative analysis of AG and LT was conducted on plants cultivated under nine environmental forms of treatment imposed by three levels of light intensity (100, 200, and 300 µmol·m−2·s−1) combined with three levels of nutrient-solution concentration (1.0, 2.0, and 3.0 dS·m−1) for hydroculture. The contents of AG in green and red perilla plant were increased by high nutrient-solution levels under the same light intensity. In green perilla, the highest concentration of AG (8.50 µg·g−1) was obtained under treatment of the highest level of nutrient-solution (3.0 dS·m−1) and 200 µmol·m−2·s−1 of light intensity, whereas in red perilla, the highest concentration of AG (6.38 µg·g−1) was achieved from the highest levels of both of these forms of treatment (300 µmol·m−2·s−1 and 3.0 dS·m−1). The increase in AG content per plant between the lowest and the highest levels was recorded by 6.4-fold and 8.6-fold in green and red perilla, respectively. The behavior of LT concentration differed between green and red forms of perilla. LT concentration in red perilla was enhanced under nutrient deficiency (1.0 dS·m−1) and affected by light intensity. Different responses were observed in the accumulations of AG and LT in red and green perilla during treatments, and this phenomenon was discussed in terms of biosynthetic pathways that involve the expressions of phenylpropanoids and anthocyanins. The total yield of flavonoids (AG and LT) was improved with the optimization of those forms of treatment, with the best total yields: 33.9 mg·plant−1 in green Perilla; 10.0 mg·plant−1 in red perilla, and a 4.9-fold and a 5.4-fold increase was recorded in green and red perilla, respectively. This study revealed that flavone biosynthesis and accumulation in perilla plants could be optimized via environmental control technologies, and this approach could be applicable to leafy vegetables with bioactive nutrition to produce a stable industrial supply of high flavonoid content.

scholarly journals Nutrient Uptake of Single-node Cutting Rose `Red Velvet' and `Vital' by Nutritional Control in a Plant Factory

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 769A-769
Author(s):  
Kyung-Hwan Yeo* ◽  
Jung-Min Son ◽  
Yong-Beom Lee
Keyword(s):  
Control System ◽  
Nutrient Uptake ◽  
Nutrient Solution ◽  
Root Zone ◽  
Drainage Water ◽  
Ionic Ratio ◽  
Single Node ◽  
Target Values ◽  
Plant Factory ◽  
Plant Stage

The plant factory to control growing system automatically is necessary to cultivate single-node cutting rose, which produce large numbers of uniform shoots per unit area in short cultivation. However, the recirculation of the nutrient solution in closed system leads to several problems. One of them is connected with the quality of nutrient solution and the supply of minerals. The uptake of specific nutrients depends on growth and development, or plant stage, which results in a shift in ionic ratio in the drainage water compared to the nutrient solution supplied. Consequently, the nutrient supply should be controlled to be equal to the demand of the plant to avoid disorder of nutrient solution, such as depletion or accumulation. Therefore this study was conducted to examine the effect of mineral nutritional control on nutrient uptake of single-node cutting rose `Red velvet' and `Vital' in a plant factory. The nutritional control of nutrient solution was conducted by five methods: the control of electrical conductivity (EC), N, P, and K elements (NPK), macro elements (M), macro and micro elements (MM) to target ranges in root zone, and the supplement of nutrient solution (S). In NPK, M, and MM control system, the input of nutrients was calculated as amounts of absorption by the plants compared to target values in root environment. The fertilizer supplement of N, P, and K was lower in EC control system than other control systems. In EC and S control system, the concentration of NO3- -N and K in root zone exceed optimal range whereas P, Ca, and Mg decreased at the later stage of growth. The concentrations of each nutrient in root environment were kept at the target ranges in M and MM control system, which showed optimum yield and product quality.

Effects of Different EC in Nutrient Solution on Growth and Quality of Red Mustard and Pak-Choi in Plant Factory

2012 ◽  
Vol 21 (4) ◽  
pp. 322-326 ◽  
Author(s):  
Sang Gyu Lee ◽  
◽  
Chang Sun Choi ◽  
Jun Gu Lee ◽  
Yoon Ah Jang ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Pak Choi ◽  
Plant Factory

Recycling waste nutrient solution originating from the plant factory with the cultivation of newly isolated Acutodesmus species

2019 ◽  
Vol 289 ◽  
pp. 15-25 ◽  
Author(s):  
Dae Geun Kim ◽  
Changsu Lee ◽  
Yeoung-Sang Yun ◽  
Chang-Hee Hong ◽  
Yoon-E Choi
Keyword(s):  
Nutrient Solution ◽  
Plant Factory

Growth and Quality of Baby Leaf Vegetables Hydroponically Grown in Plant Factory as Affected by Composition of Nutrient Solution

2015 ◽  
Vol 24 (4) ◽  
pp. 271-274 ◽  
Author(s):  
Yurina Kwack ◽  
유리나 곽 ◽  
Dong Sub Kim ◽  
Changhoo Chun ◽  
동섭 김 ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Plant Factory ◽  
Hydroponically Grown ◽  
Leaf Vegetables

scholarly journals Optimization of Indole-3-Acetic Acid Concentration in a Nutrient Solution for Increasing Bioactive Compound Accumulation and Production of Agastache rugosa in a Plant Factory

Agriculture ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 343
Author(s):  
Vu Phong Lam ◽  
Mun Haeng Lee ◽  
Jong Seok Park
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Bioactive Compounds ◽  
Nutrient Solution ◽  
Leaf Gas Exchange ◽  
Bioactive Compound ◽  
Control Treatment ◽  
Gas Exchange Parameters ◽  
Plant Factory ◽  
Indole 3 Acetic Acid

This study aimed to determine the optimal indole-3-acetic acid (IAA) concentration in a nutrient solution to increase the bioactive compounds while enhancing the plant growth of A. rugosa grown hydroponically. Twenty-eight-day-old plants were transplanted in a plant factory for 32 days. The plants were subjected to various IAA concentrations (10−11, 10−9, 10−7, and 10−5 M) from 8 days after transplanting, and the control treatment (without IAA). Shoot and root fresh weights were effectively improved under 10−7 and 10−9 IAA treatments. Leaf gas exchange parameters were increased under 10−7 and 10−9 IAA treatments. Four of the IAA treatments, except 10−11 IAA treatment, significantly increased the rosmarinic acid (RA) concentration, as well as the tilianin concentration was significantly increased at all IAA treatments, compared with that of the control. Especially, the tilianin concentration of the 10−11 IAA treatment was significantly (1.8 times) higher than that of the control. The IAA treatments at 10−5 and 10−7 significantly raised the acacetin concentrations (1.6- and 1.7-times, respectively) compared to those of the control. These results suggested that 10−7 concentration of IAA in a nutrient solution was effective for enhancing plant growth and increasing bioactive compounds in A. rugosa, which offers an effective strategy for increasing phytochemical production in a plant factory.

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