Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.)

Miliauskienė, Jurga; Karlicek, R. F.; Kolmos, Elsebeth

doi:10.3390/plants10040762

Cited by 10 publications

(5 citation statements)

References 33 publications

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“…The carotenoids contents of lettuce were sharply enhanced by pulsed lighting due to pulsed light and had a remarkable effect on increasing photosynthetic rate in lettuce ( Miliauskienė et al, 2021 ). Thus, different frequencies of supplemental blue light could promote the early color change and maturation of tomato fruits; this could be attributed to blue light regulating the transcriptional levels of light transcription factors such as SlPIFs and SlHY5 gene and mature promoter gene SlRIN , thus affecting the process of fruit lycopene metabolism ( Xie et al, 2019 ; Dong et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…CRY2 overexpression increased flavonoid and lycopene levels in ripe tomato fruits ( Giliberto et al, 2005 ). Compared to continuous lighting, pulsed light increased polyphenols contents and the antioxidant capacity of lettuce ( Miliauskienė et al, 2021 ) and wheat plants ( Dong et al, 2015 ), which could be due to the stimulating effect of pulsed light on gene expression and activity rates of the key enzymes related to phenylpropanoid biosynthesis. In this study, the phenolics and flavonoids content under supplementary blue light treatments were significantly higher than CK ( Figures 5B,C ) and higher levels of phenolics and flavonoids were observed in higher frequencies of supplemental blue light ( Figures 5B,C ).…”

Section: Discussionmentioning

confidence: 99%

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Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

Wei

Zhang

et al. 2022

Front. Plant Sci.

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Tomatoes (Solanum lycopersicum L. Micro-Tom) were grown in a plastic greenhouse. When plants anthesis, the 100 μmol m–2 s–1 blue light-emitting diode (LED) light (430 ± 10 nm) was supplemented from 6:00 to 18:00. There were 5 treatments, which contained different blue light frequencies with the same intensity: S6 (30 min blue light and 30 min pause), S8 (30 min blue light and 15 min pause), S10 (30 min blue and 8 min pause), S12 (continuous blue light for 12 h), and control (CK) (natural light, without any supplemental light). Agronomic traits and nutritional qualities of tomato fruits were measured at 30, 34, 38, 42, and 46 days after anthesis (DAA), respectively. Different frequencies of supplemental blue light could accelerate flowering of tomato plants and promote fruit ripening about 3–4 days early via promoting ethylene evolution of fruits, which significantly facilitated the processes of color change and maturity in tomato fruits. The contents of lycopene, total phenolic compounds, total flavonoids, vitamin C, and soluble sugar, as well as the overall antioxidant activity of tomato fruits were significantly enhanced by all the supplemental blue light treatments. In all, different frequencies of supplemental blue light prominently reinforced the antioxidant levels and nutritional qualities of tomato fruits, especially lycopene content, and S10 was more optimal for tomato fruits production in a plastic greenhouse.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

Wei

Zhang

et al. 2022

Front. Plant Sci.

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“…These authors showed that leaves left in darkness after UV-B treatment had substantially higher chlorophyll content and photosynthetic efficiency than those kept in constant light. In another study it was also observed that irradiation of light-emitting diodes substantially increased chlorophyll a and b content, leaf area, and overall growth in lettuce (Miliauskienė et al, 2021). Lately, it was reported that the reduction in leaf expansion in UV-B-irradiated leaves was imputed to the decline in cell production and shortened growth zone (Fina et al, 2017).…”

Section: Leaf Area/sizementioning

confidence: 93%

Perspective on the influence of ultraviolet radiations in plant growth and development

et al. 2022

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Accumulating evidence points to the multidimensional role of ultraviolet radiation in plant growth and development. Ultraviolet-A (UV-A), as the main component of UV radiation in nature, has a wide range of effects on plants. As there is some evidence of its positive effect as a regulator of plant growth in a controlled environment, there has long been interest in the use of UV-A in agriculture. However, the role of UV-A in plant growth remains largely unknown and the number of studies looking at the effects of UV-A in a controlled environment is still too small. The review carried out here also includes the effects of other UV components on plant growth, morphology and physiology, such as: UV-B, as well as the interplay of other abiotic stresses and UV-A as growth regulators. On the basis of the synthesis presented here, it can be concluded e.g. that lower doses of UV-A radiation can stimulate the growth of plant in a controlled environment. Perhaps it will soon contribute to the optimization of indoor plant growing recipes.

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“…And its economic effect is achieved not only due to the high energy efficiency of LED light sources, their high reliability (the lifetime is more than 10 times higher than that of HPS lamps) but also, due to fundamentally new capabilities of agricultural technology to increase cultivation productivity for by optimizing the growth and development of plants by controlling the spectral composition and radiation intensity of LEDs at all stages of ontogenesis. Thus, numerous studies have shown the effects of LEDs on plants, such as elongation, axillary shoot formation, leaf anatomy, and rhizogenesis [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Efficiency of LED Irradiation for Cultivating High-Quality Tomato Seedlings

et al. 2021

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Light qualities are considered to affect many plant physiological processes during growth and development. To investigate how light qualities make an influence on tomato seedlings under greenhouse conditions, the growth and morphological parameters of tomato seedlings (Fortizia F1RC hybrid) were studied under three supplemental light irradiations such as light-emitting diodes with nanoparticle coating (LED 1—Red light-emitting diodes); Blue, Green, Yellow, Red light-emitting diodes (LED 2), and traditional high-pressure sodium (HPS) lamps with different photosynthetic photon flux density and the same irradiation time for 33 days. Morphological appearances of three groups of tomato seedlings were different between light treatments, that is, the plants under LED-1 and LED-2 were shorter than those under HPS, while stem diameter, leaf area, dry and fresh weights, and health indices of tomato seedlings grown under alternative light sources were higher than of those cultivated under traditional HPS lights. However, the higher plant height was in plants containing traditional high-pressure sodium lamps treatment. Photosynthetic pigments were shown to have a significant difference under respective light irradiations of LEDs. The levels of photosynthetic pigments were higher in the leaves of seedlings under LED 1 and LED 2, and lower in those that underwent HPS control treatment. Based on the data of morphological and statistical analysis, LEDs with nanoparticle coating proved to be beneficial factors for the growth of tomato seedlings under greenhouse conditions.

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Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.)

Cited by 10 publications

References 33 publications

Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

Supplemental Blue Light Frequencies Improve Ripening and Nutritional Qualities of Tomato Fruits

Perspective on the influence of ultraviolet radiations in plant growth and development

The Efficiency of LED Irradiation for Cultivating High-Quality Tomato Seedlings

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