Plant Cohort Research and Its Application

Kozai, Toyoki; Lü, Na; Hasegawa, Rikuo; Nunomura, Osamu; Nozaki, Tomomi; Amagai, Y.

doi:10.1007/978-981-13-1065-2_26

Cited by 3 publications

(20 citation statements)

References 5 publications

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“…Variations in the traits (i.e., phenotypes) of individual plants are attributable to mainly three factors: environment, genotype (specific to species and cultivar), and management (human and/or machine intervention), including seed treatments. Plant phenotyping plays a crucial role in understanding these interactions [1,2]. Plant phenotyping is a set of methodologies and protocols used to study plant growth, performance, architecture, and composition at different scales of organization, from organs to canopies, and it reveals the plant trait dynamics in a non-invasive and non-destructive manner [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…Seed germination is one of the most important initial stages of plant growth, and the ecophysiological status of germinated seeds has an impact on the subsequent plant growth process [2,16]. Germination is generally defined as emergence of the radicle through the surrounding structure after water uptake by the seed [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…Germination time provides valuable information about the favorability of germination conditions [18]. In order to achieve uniform harvests, it is important to identify the causes of the variations in seed germination time and eliminate those factors that contribute to the variability [2]. The time course curves produced in seed germination tests provide considerable information about germination time and its uniformity of seeds [17].…”

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].…”

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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Variations in the Growth of Cotyledons and Initial True Leaves as Affected by Photosynthetic Photon Flux Density at Individual Seedlings and Nutrients

Amagai

Kozai²,

Maruo³

et al. 2022

Agronomy

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Plant factories with artificial lighting (PFALs), with well-insulated and airtight structures, enable the production of large quantities of high-quality plants year-round while achieving high resource use efficiency. However, despite the controlled environment in PFALs, variations in plant individuals have been found, which affect productivity in PFAL operations. Plant phenotyping plays a crucial role in understanding how the surrounding microenvironment affects variations in plant phenotypes. In the current study, a modular phenotyping system for seedling production was developed, focusing on practicality and scalability in commercial PFALs. Experiments on seedlings, which strongly affect productivity, were conducted to obtain cotyledon unfolding time and the time series projected area of cotyledons and true leaves of individual seedlings of romaine lettuce (Lactuca sativa L. var. longifolia), using RGB images. This was also undertaken to analyze how the surrounding microenvironment of photosynthetic photon flux densities and nutrients affect growth variations for plant cohort research. In agreement with the actual measurements, variations in seedling growth were identified even under similar microenvironments. Furthermore, the results demonstrated larger variations in seedlings with higher relative growth. Aiming for simplified interactions of phenotypes with the microenvironment, management, and genotype, seedling selection and breeding with plant production in PFALs may enable plant uniformity and higher productivity.

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Quantifying the Effect of Light Intensity Uniformity on the Crop Yield by Pea Microgreens Growth Experiments

Balázs,

Kovács,

Gyuricza

et al. 2023

Horticulturae

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Differences in individual plant growth are affected by the spatial variation of light intensity, reducing the homogeneity of microgreen crops. Identifying the tradeoffs between light uniformity and crop quality is challenging due to the confounding effect of nonuniform illuminance with other noise factors. This study presents the results of hydroponic pea (Pisum sativum, L.) growth experiments aimed at quantifying the effect of photon irradiance variations. By adjusting the power of LED luminaires, we established one uniformly illuminated zone and two non-uniformly illuminated zones. Germinated seeds with 6 cm-long radicles were transplanted to cultivation trays with known light intensity in predetermined positions. Plants were cut 12 days after the start of light treatment and measured for fresh weight and shoot height. Our findings revealed no significant difference between the crop yield on trays having the same average PPFD but different light uniformity. However, correlation analysis of individual measurement data showed that local PPFD differences explained 31% of the fresh weight variation, and the rest was attributed to noise in the germination and growth processes. We also discuss the implications of our findings for the design and optimization of vertical farms.

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Plant Cohort Research and Its Application

Cited by 3 publications

References 5 publications

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

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

Variations in the Growth of Cotyledons and Initial True Leaves as Affected by Photosynthetic Photon Flux Density at Individual Seedlings and Nutrients

Quantifying the Effect of Light Intensity Uniformity on the Crop Yield by Pea Microgreens Growth Experiments

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