Plant experiments with light-emitting diode module in Svet space greenhouse

Ilieva, Iliana; Ivanova, T.; Naydenov, Yordan; Dandolov, Ivan; Stefanov, D.

doi:10.1016/j.asr.2010.05.009

Cited by 50 publications

(31 citation statements)

References 25 publications

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“…Other authors have demonstrated that low light results in more effective functioning of PSII [12], higher contents of chloroplast pigments and electron carriers [26], whereas high light causes degeneration of pigments as they participate in photoprotection. However, Fu and coauthors [23] suggest that at lower light levels (200 μmol m -2 s -1 ), light use efficiency is the highest, whereas at high, but tolerable light (400-600 μmol m -2 s -1 ) levels, lettuce plant yield is the highest.…”

Section: Discussionmentioning

confidence: 99%

“…Lighting systems should provide sufficient photosynthetic photon flux for optimal efficiency of plant photosynthetic processes and also meet the constraints for light power [12]. It is, therefore, necessary to select the optimal irradiance level from both an agronomic and economic perspective.…”

Section: Discussionmentioning

confidence: 99%

“…It is, therefore, necessary to select the optimal irradiance level from both an agronomic and economic perspective. A minimum level of irradiance is necessary for sufficient synthesis and activity of photosynthetic pigments, biomass, leaf area formation or nitrogen investment between photosynthetic components [12,22]. In our experiments, low LED light levels negatively affected brassica microgreen growth parameters: irradiance levels of 110 or 220 μmol m -2 s -1 resulted in hypocotyl elongation, and a decrease in dry weight and leaf area, whereas higher PPFD levels (up from 330 μmol m -2 s -1 ) resulted in proper growth parameters.…”

Section: Discussionmentioning

confidence: 99%

“…However, there is still a lack of information regarding the optimal light spectral conditions and irradiance levels for growth and nutitional value of plants of different genotypes and maturity stages. While low light can cause photoinhibition [12] or nitrate accumulation [13], high irradiance levels may create mild photostress and activate photoprotective mechanisms which influence the production of primary and secondary metabolites in plants. Plants acclimate to high light levels by increasing photosynthesis [12,14] and, compounds such as ascorbate, glutathione, carotenoids, or α-tocopherol [15,16] that have antioxidant capacities which are important for human nutrition.…”

Section: Introductionmentioning

confidence: 99%

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LED irradiance level affects growth and nutritional quality of Brassica microgreens

et al. 2013

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This study examines the effect of irradiance level produced by solid-state light-emitting diodes (LEDs) on the growth, nutritional quality and antioxidant properties of Brassicaceae family microgreens. Kohlrabi (Brassica oleracea var. gongylodes, ‘Delicacy Purple’) mustard (Brassica juncea L., ‘Red Lion’), red pak choi (Brassica rapa var. chinensis, ‘Rubi F1’) and tatsoi (Brassica rapa var. rosularis) were grown using peat substrate in controlled-environment chambers until harvest time (10 days, 21/17°C, 16 h). A system of five lighting modules with 455, 638, 665 and 731 nm LEDs at a total photosynthetic photon flux densities (PPFD) of 545, 440, 330, 220 and 110 µmol m−2s−1 respectively were used. Insufficient levels of photosynthetically active photon flux (110 µmol m−2 s−1) suppressed normal growth and diminished the nutritional value of the Brassica microgreens studied. In general, the most suitable conditions for growth and nutritional quality of the microgreens was 330–440 µmol m−2 s−1 irradiation, which resulted in a larger leaf surface area, lower content of nitrates and higher total anthocyanins, total phenols and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging capacity. High light levels (545 µmol m−2 s−1), which was expected to induce mild photostress, had no significant positive impact for most of investigated parameters.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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LED irradiance level affects growth and nutritional quality of Brassica microgreens

et al. 2013

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“…It is necessary to select the optimal irradiance level from both agronomic and economic perspective. A minimum level of irradiance is necessary for sufficient synthesis and activity of photosynthetic pigments, biomass, leaf area formation or nitrogen investment between photosynthetic components (Evans and Poorter, 2001;Ilieva et al, 2010). Photoperiod can affect phytochemical accumulation in microgreens, and potentially interact with light quality and intensity (Kyriacou et al, 2016).…”

Section: Determination Of Chlorophyll a And Chlorophyll Bmentioning

confidence: 99%

Content of Selected Bioactive Substances in Dependence on Lighting in Microgreens

Andrejiová

Hegedüsová

Mezeyová

et al. 2017

Acta Horticulturae Et Regiotecturae

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Young plants, also called "microgreens", are different kinds of vegetables, grains and herbs grown to the phenological phase of cotyledons, or to the development of the first pair of true leaves. The aim of the work was to study the influence of lighting on the young plants quality in selected 11 vegetables species. The experiment was carried out during the winter time in a heated greenhouse of the Botanical gardens of SUA in Nitra. For the lighting there were used linear fluorescent lamps FLUORA T8 -L 36W / 77 -g13 during the whole period of cultivation. According to our results, the lighting had a positive impact on the quality of harvested plants. The higher contents of vitamin C, chlorophyll a and chlorophyll b were estimated in comparison with the control variant without lighting.

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Effects of light quality on the accumulation of phytochemicals in vegetables produced in controlled environments: a review

Bian

Yang

Liu

2014

J. Sci. Food Agric.

374

224

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Phytochemicals in vegetables are important for human health, and their biosynthesis, metabolism and accumulation are affected by environmental factors. Light condition (light quality, light intensity and photoperiod) is one of the most important environmental variables in regulating vegetable growth, development and phytochemical accumulation, particularly for vegetables produced in controlled environments. With the development of light-emitting diode (LED) technology, the regulation of light environments has become increasingly feasible for the provision of ideal light quality, intensity and photoperiod for protected facilities. In this review, the effects of light quality regulation on phytochemical accumulation in vegetables produced in controlled environments are identified, highlighting the research progress and advantages of LED technology as a light environment regulation tool for modifying phytochemical accumulation in vegetables.

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Plant experiments with light-emitting diode module in Svet space greenhouse

Cited by 50 publications

References 25 publications

LED irradiance level affects growth and nutritional quality of Brassica microgreens

LED irradiance level affects growth and nutritional quality of Brassica microgreens

Content of Selected Bioactive Substances in Dependence on Lighting in Microgreens

Effects of light quality on the accumulation of phytochemicals in vegetables produced in controlled environments: a review

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