Towards sustainable plant factories with artificial lighting (PFALs): from greenhouses to vertical farms

Kozai, Toyoki; Amagai, Y.

doi:10.19103/as.2019.0052.06

Cited by 8 publications

(17 citation statements)

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“…Plant factory with artificial lighting (PFAL) is a closed plant production system with a nearly airtight and well-insulated structure, which allows increased resource utilization efficiency under a precisely controlled environment, aiming to produce high quantities of high-quality plants throughout the year, entirely independent of outdoor conditions [12][13][14]. Particularly the advances in lighting technology, including light-emitting diodes (LEDs) and others, could increase controllability of the light environment of plants, thereby improved the yield and functional components of vegetables and fruits [15][16][17][18].…”

Section: Light Environment Control In the Plant Factory With Artificial Lightingmentioning

confidence: 99%

External green light as a new tool to change colors and nutritional components of inner leaves of head cabbages

Amagai

Takagaki

et al. 2021

Food Measure

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The color and nutritional quality of vegetables directly affect the choices of consumers and thus affect the commercial value of the vegetable products. Green light can penetrate the outer leaves and reach the inner leaves to promote photochemical reaction of the overlapping leaves of head vegetables. However, whether this promotion can increase the nutritional components and change the color of the inner leaves of head cabbages, which is one of the major head vegetables largely produced worldwide, remains unclear. Therefore, we investigated the changes in the colors and the concentrations of chlorophyll (Chl) and carotenoid of the inner leaves of two types of cabbages by externally irradiating the cabbage with green light. The results showed that a short-term (48 h) irradiation with low light intensity (50 μmol m−2 s−1) of green light enhanced the Chl concentration and colors of the inner leaves of cabbages, and the positive changes of these indicators increased as the leaf layers approached the head center of the cabbage. Simultaneously, we also establish a method to effectively estimate the Chl concentration using luminosity (L*) and greenness (− a*) when the Chl concentration is so low that it is difficult or not possible to be measured by SPAD meter. Our findings demonstrated that green light, as a new tool, can be used to control the colors and nutritional components of the inner leaves of cabbages. The discoveries will help produce head vegetables with the preferred phenotype desired by consumers using a plant factory with artificial lighting.

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Section: Light Environment Control In the Plant Factory With Artificial Lightingmentioning

confidence: 99%

External green light as a new tool to change colors and nutritional components of inner leaves of head cabbages

Amagai

Takagaki

et al. 2021

Food Measure

Self Cite

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“…Plant factory with artificial lighting (PFAL) is a closed plant production system, with an almost airtight and well-insulated structure, which allows increased resource utilization efficiency under a precisely controlled environment to produce high quantities of high quality plants year-round, completely independently of outdoor conditions [8][9][10][11][12][13][14]. However, despite the highly controlled environment in PFAL, the variations in plant individuals have been found specifically at the time of harvesting, urging the development of a new phenotypic analysis platform [2,15].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In the plant cohort research, the life cycle phenome history of individual plants can be measured continuously and noninvasively, and analyzed from seed sowing to harvesting by using phenotyping units, along with the time course data on environment, management, and resource inputs/outputs in PFAL [2,11,12,24]. Plant cohort refers to a relatively large group of plant individuals with a statistical factor (such as cultivar, planting density, and cultivation system) in common with the plants in a PFAL for commercial plant production and/or breeding [2,11,12,24]. For the plant cohort research, the time series data sets in the data warehouse (DWH) can be used, which leads to identification of an optimal set points of environmental factors for maximizing multi-objective function, and concurrently improve plant productivity and breed new cultivars in PFAL [2,11,12,24].…”

Section: Introductionmentioning

confidence: 99%

“…Plant cohort refers to a relatively large group of plant individuals with a statistical factor (such as cultivar, planting density, and cultivation system) in common with the plants in a PFAL for commercial plant production and/or breeding [2,11,12,24]. For the plant cohort research, the time series data sets in the data warehouse (DWH) can be used, which leads to identification of an optimal set points of environmental factors for maximizing multi-objective function, and concurrently improve plant productivity and breed new cultivars in PFAL [2,11,12,24].…”

Section: Introductionmentioning

confidence: 99%

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Phenotypic Analysis of Germination Time of Individual Seeds Affected by Microenvironment and Management Factors for Cohort Research in Plant Factory

Amagai

Maruo

Kozai³

2020

Agronomy

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Plant phenotyping plays a crucial role in understanding variations in the phenotype of individual plants affected by environment, management, and genotype. Measurement of seed germination is an important phenotyping stage as germination impacts on the whole plant growth process. However, germination measurement has been limited to germination percentage of a seed population. Understanding of the germination time, from sowing to outbreak of the radicle from seed coat, at a single seed level is essential. How individual germination time and further plant growth are affected by its microenvironment and management factors remains elusive. Plant phenotype measurement system was developed to assess individual germination time of romaine lettuce (Lactuca sativa L. var. longifolia), using time-series two-dimensional camera images, and to analyze how microenvironment (volumetric water percent in seed tray, individual seed surface temperature and air temperature) and management factors (coated/uncoated seeds) affect the germination time for plant cohort research, emphasizing practicality in commercial cultivation. Germination experiments were conducted to demonstrate the performance of the system and its applicability for a whole plant growth process in a plant factory for commercial production and/or breeding. The developed phenotyping platform revealed the effects of microenvironment and management factors on germination time of individual seeds.

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Vertical Greenhouses Agro-technology: Solution Toward Environmental Problems

Klyuchka

Petkovic

2021

Ecological Intensification of Natural Resources for Sustainable Agriculture

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Towards sustainable plant factories with artificial lighting (PFALs): from greenhouses to vertical farms

Cited by 8 publications

References 0 publications

External green light as a new tool to change colors and nutritional components of inner leaves of head cabbages

External green light as a new tool to change colors and nutritional components of inner leaves of head cabbages

Phenotypic Analysis of Germination Time of Individual Seeds Affected by Microenvironment and Management Factors for Cohort Research in Plant Factory

Vertical Greenhouses Agro-technology: Solution Toward Environmental Problems

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