Modeling morphological adaptations of bell pepper (Capsicum annuum) to light spectra

Claypool, Nicholas B.; Lieth, J. Heinrich

doi:10.1016/j.scienta.2021.110135

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…In pepper plants, green light increases the leaf area, while red light is associated with photosynthetic efficiency and phytochrome activity. Therefore, a reduction in light absorption by the leaves due to red light may negatively affect crop growth [31,32].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Bell Pepper (Capsicum annuum L.) Leaf Spectral Properties and Photosynthesis According to Growth Period

Goo,

Roh,

Lee

et al. 2024

Horticulturae

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This study analyzed the leaf spectral properties and photosynthesis rates of greenhouse-grown bell pepper leaves according to the growth period and leaf position to investigate the changes in carbon assimilation function according to leaf aging. Photosynthesis, growth, transpiration, stomatal conductance, light transmittance, and light reflectance were measured. As the plants’ growth progressed, the number of leaves, fresh weight, and dry weight increased, but the specific leaf area decreased, likely due to the increased distribution of assimilates to reproductive organs. The average photosynthesis rate, according to the measured dates, exhibited a high value despite a large standard error, which was likely influenced by measurement errors caused by external environmental factors. The reflectance and transmittance increased from the upper to the middle and bottom leaves, and the absorption ratio decreased in the same order. The green light spectrum (500–580 nm) had a lower absorption ratio than other spectra because the green coloration of the leaves increased the light reflectance of this spectrum. As the PPFD increased where the leaf was positioned higher, the photosynthesis rate, transpiration amount, and stomatal conductance also increased. The higher the leaf position, the higher the photosynthesis rate, the amount of transpiration, and the stomatal conductance. As the CO2 concentration increased, the photosynthesis rate increased, but the transpiration and stomatal conductance changed little, indicating that the gas exchange within leaves was hardly affected by CO2, but the light levels promoted photosynthesis. From the results of this study, the optical properties of the leaves indicate that they are consistent with Lambert–Beer’s law, which implies that the length of the optical path is linearly proportional to the number of molecules in the absorption layer. We obtained the light saturation point and CO2 saturation point of bell peppers grown in a greenhouse and were able to determine the physiological changes in the leaves with increasing leaf age. Therefore, based on this information, it appears that a leaf removal model based on the productivity of bell pepper leaves could be developed.

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Section: Discussionmentioning

confidence: 99%

Analysis of Bell Pepper (Capsicum annuum L.) Leaf Spectral Properties and Photosynthesis According to Growth Period

Goo,

Roh,

Lee

et al. 2024

Horticulturae

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“…Some studies have revealed that monochromatic light cannot meet the light requirements for optimal plant growth [24][25][26]. Due to the lack of other wavebands, monochromatic light or different ratios of red + blue combined light do not induce a response from some photoreceptors in plants, which may hinder plant growth and development [27][28][29][30][31]. Therefore, studies on the effects of monochromatic wavelengths with a white light base on tomato fruit yield and taste would be more practical for determining the optimal light source for tomato production in PFALs.…”

Section: Introductionmentioning

confidence: 99%

Response of Flavor Substances in Tomato Fruit to Light Spectrum and Daily Light Integral

Fan,

Lu,

et al. 2023

Plants

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Light-emitting diodes (LEDs) have been widely used as light sources for plant production in plant factories with artificial lighting (PFALs), and light spectrum and light amount have great impacts on plant growth and development. With the expansion of the product list of PFALs, tomato production in PFALs has received attention, but studies on fruit quality influenced by artificial light are lacking. In this study, precisely modulated LED light sources based on white light combined with additional red, blue, and green lights were used to investigate the effects of light spectrum and daily light integral (DLI) on the main quality indicators and flavor substances of “Micro-Tom” tomato fruits. The highest sugar–acid ratio was obtained under the white light with addition of red light with high DLI and blue light with low DLI. The contents of β-carotene, lycopene, and lutein were significantly increased by higher DLI conditions except for under the blue light treatment, and the cross-interactions between the light spectrum and DLI were observed. The accumulation of the main flavor substances in tomato fruits was decreased by addition of green light with a high DLI and red light with a low DLI; notably, the percentage of 2-isobutylthiazole, which is associated with fresh tomato aroma, was decreased by green light. This study provides insights for improving tomato fruit quality and flavor by regulating light conditions in PFALs.

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LED light modifies plant architecture, physiological parameters and cannabinoid content in three varieties of Cannabis sativa L.

Carranza-Ramírez,

Borda,

Moreno-Fonseca

2025

South African Journal of Botany

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Modeling morphological adaptations of bell pepper (Capsicum annuum) to light spectra

Cited by 3 publications

References 39 publications

Analysis of Bell Pepper (Capsicum annuum L.) Leaf Spectral Properties and Photosynthesis According to Growth Period

Analysis of Bell Pepper (Capsicum annuum L.) Leaf Spectral Properties and Photosynthesis According to Growth Period

Response of Flavor Substances in Tomato Fruit to Light Spectrum and Daily Light Integral

LED light modifies plant architecture, physiological parameters and cannabinoid content in three varieties of Cannabis sativa L.

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