Sweet Pepper (Capsicum annuum L.) Canopy Photosynthesis Modeling Using 3D Plant Architecture and Light Ray-Tracing

Kim, Jee Hoon; Lee, Joon Woo; Ahn, Tae In; Shin, Jong Hwa; Park, Kyoung Sub; Son, Jung Eek

doi:10.3389/fpls.2016.01321

Cited by 50 publications

(27 citation statements)

References 41 publications

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“…The photosynthetic activity records of each tomato leaf provide us with information on the relative importance of the different leaves in the acquisition of carbon through photosynthesis. As previously highlighted by modeling tomato [31] and sweet pepper (from 37.0 at the top to 12.4 µmol CO 2 m −2 s −1 at the bottom; [32]), we confirmed a vertical distribution of the potential photosynthetic activity of the leaves.…”

Section: Discussionsupporting

confidence: 88%

To Stop Nitrogen Overdose in Soilless Tomato Crop: A Way to Promote Fruit Quality without Affecting Fruit Yield

Truffault¹,

Ristorto²,

Brajeul³

et al. 2019

Agronomy

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Precision horticulture is fundamental to ensure high quality production with a minimalenvironmental footprint. It offers the possibility to manage climatic and fertilization inputs closerto the plant needs. In practice, there is a tendency to over‐fertilize, as nitrogen limitation candecrease photosynthesis and consequently fruit yield, but also because nutrient recycling does notlead to any substantial costs increase, thus ignoring the influence of nitrogen input on the balancebetween growth and metabolism. Nitrogen recommendation for tomato greenhouse production onrockwool is 16mM, even it is well established that only 50% of nitrogen amount is really absorbedby plants. This study compares the usual practice (16 mM) to a nitrogen supply to meet plant’sneeds (5 mM). We analyzed plant growth and development, yield, leaf photosynthetic activity andfruit quality (sugars, acids, vitamin C,) over the entire crop period (December to October).Over‐fertilization favoured the accumulation of nitrogen in leaves and stem but yield, leafphotosynthetic activity and plant architecture were not significantly improved. In addition, itdecreased the quality of the tomatoes as the sugar:acid ratio decreased dramatically in the pericarp,whereas the locular gel composition remained similar. A reduction of the nitrogen supply is onesolution to improve tomato quality without any reduction of yield in greenhouse. These data haveto be incorporated in tomato fertigation management to define a new standard based on overallquality of tomato fruit and low environmental footprint.

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Section: Discussionsupporting

confidence: 88%

To Stop Nitrogen Overdose in Soilless Tomato Crop: A Way to Promote Fruit Quality without Affecting Fruit Yield

Truffault¹,

Ristorto²,

Brajeul³

et al. 2019

Agronomy

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“…The distributions of light intensity, temperature, and humidity could have reflected the microclimate variations in different chestnut canopy locations. Similar results were obtained regarding the spatial light distributions of other types of trees [41][42][43].…”

Section: Microclimate Distribution Within the Canopysupporting

confidence: 85%

Effects of Canopy Microclimate on Chinese Chestnut (Castanea mollissima Blume) Nut Yield and Quality

Wen

Zhang

2020

Forests

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There are considerable differences in chestnut yield and quality across different chestnut-producing regions in China, indicating that environmental factors affect these properties of chestnuts. Furthermore, nut yield and quality differ depending on canopy position. Therefore, this study investigated the relationship between the canopy microclimate, nut yield, and quality. We determined microclimate factors from blossoming to ripening at different positions in the canopy. Nut yield and quality and the number of different branch types were measured at various canopy positions. The light intensity and temperature of the different canopy layers exhibited funnel-form distributions ranging from 0 to 3600 μmol·m2·s−1 and from 32 to 37 °C, respectively. Canopy humidity showed an inverted funnel-shaped distribution ranging from 26% to 40%. Nut yield and quality in the top and outer canopies were higher than in the bottom and inner canopies. Branches in the top-middle and peripheral parts of the canopy also produced higher yields, especially strong branches that bore more nuts. Nut yield and quality had positive correlations with light intensity (r = 0.735) and temperature (r = 0.709), whereas they were inversely associated with humidity (r = −0.584). The nut yield was more than 200 gm−3 when the light intensity was above 1500 μmol·m2·s−1, the temperature was above 34.4 °C, and the humidity was below 27.5%.

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“…Models have been devised to predict light interception potential of plants by tracing canopy architecture, leaf area and proximity to other plants (Kim et al . ). New selections may be identified through these automated analyses.…”

Section: Exploiting Plasticitymentioning

confidence: 97%

“…In some cases breeding for controlled environments may be facilitated by analysis of early traits (Watt et al 2013), and selection may even be automated using machine vision (Fahlgren et al 2015). Models have been devised to predict light interception potential of plants by tracing canopy architecture, leaf area and proximity to other plants (Kim et al 2016). New selections may be identified through these automated analyses.…”

Section: Exploiting Plasticitymentioning

confidence: 99%

Breeding new varieties for controlled environments

Folta

2018

Plant Biol J

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Agricultural production in controlled environments is increasingly feasible, and may play an important role in providing nutrition and choice to growing urban centres. New technologies in lighting, ventilation, robotics and irrigation are just a few of the innovations that enable production of high-value specialty crops outside of a traditional field setting. However, despite all of the advances in the hardware within the plant factory operation, innovation of the most complex machine has been neglected - the plant itself. Indoor agricultural operations typically rely on legacy varieties, plants selected and bred for field conditions. In the field, phenotypic stability is paramount, as production must be consistent in an unpredictable and changing environment. However, the controlled environment affords focus on different breeding priorities as environmental flux, pests, pathogens and post-harvest quality are less formidable barriers to production. On the contrary, breeding for controlled environments shifts the focus to a completely different set of plant traits, such as rapid growth, performance in low light environments and active manipulation of plant stature. Instead of breeding for phenotypic stability, plants may be bred to maximise genetic plasticity, allowing specific traits to be presented as a function of the quality of the ambient light spectrum. In this scenario plant varieties may be grown with optimal size, supporting a focus on consumer traits like flavour or accumulation of health-related compounds. Gene editing may be a central technology in the production of designer plants for controlled environments. This review considers the opportunity for breeding for controlled environments, with a focus on a revision of priorities for controlled-environment breeders.

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Sweet Pepper (Capsicum annuum L.) Canopy Photosynthesis Modeling Using 3D Plant Architecture and Light Ray-Tracing

Cited by 50 publications

References 41 publications

To Stop Nitrogen Overdose in Soilless Tomato Crop: A Way to Promote Fruit Quality without Affecting Fruit Yield

To Stop Nitrogen Overdose in Soilless Tomato Crop: A Way to Promote Fruit Quality without Affecting Fruit Yield

Effects of Canopy Microclimate on Chinese Chestnut (Castanea mollissima Blume) Nut Yield and Quality

Breeding new varieties for controlled environments

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