Light-Emitting Diodes (LEDs) for Improved Nutritional Quality

Samuolienė, G.; Brazaitytė, A.; Vaštakaitė, Viktorija

doi:10.1007/978-981-10-5807-3_8

Cited by 15 publications

(11 citation statements)

References 121 publications

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“…Hence, we suggest that increasing blue light fraction could be also beneficial for productivity of phenolic compounds in M. laevis cultures. These observations confirmed the well-known phenomenon of species-dependent differential metabolic response to the same conditions in vitro, including illumination spectrum (Samuoliene et al 2017). The cellular mechanisms of these responses involve among others indirect influence on biosynthetic genes expression via photoreceptors or auxin responsive factors.…”

Section: Discussionsupporting

confidence: 85%

LED illumination and plant growth regulators’ effects on growth and phenolic acids accumulation in Moluccella laevis L. in vitro cultures

et al. 2020

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Moluccella laevis L. (Lamiaceae) is an annual ornamental plant, naturally occurring in the areas of Western and Central Asia (Irano-Turanian area). It is a popular ornamental species, but its phytochemical profile remains poorly studied. This study presents the first report on in vitro cultures of M. laevis. The influence of two types of illumination and plant growth regulators (PGRs) supplementation on the morphogenetic response and the content of phenolic compounds were examined. Shoots were cultured on Murashige and Skoog (MS) solid basal medium. White light or photosynthetic active radiation (PAR) as well as three concentrations of 6-benzylaminopurine (BA) 2, 3 or 4 µM and one of the three auxins: 1-naphthaleneacetic acid (NAA), indole-3-acetic acid (IAA) or 4-amino-3,5,6-trichloropicolinic acid (picloram-PIC) at concentration of 0.5 µM were used for shoot proliferation. The highest number of axillary shoots per explant (3.4) was obtained for shoots grown on MS medium supplemented with 3-µM BA and 0.5-μM NAA under PAR light. However, the effect of PGRs treatment on shoot growth and development was stronger than the influence of light. The phytochemical analysis using Ultra-Performance Liquid Chromatography-Mass Spectrometry allowed identification of four hydroxycinnamic acids (caffeic, ferulic, rosmarinic, chlorogenic) and two cyanidin glycosides (cyanidin 3-O-galactoside, and cyanidin 3-O-malonylglucoside) in shoot clusters and callus tissue.

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Section: Discussionsupporting

confidence: 85%

LED illumination and plant growth regulators’ effects on growth and phenolic acids accumulation in Moluccella laevis L. in vitro cultures

et al. 2020

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“…The influence of R or B LED light was investigated also as a short-term treatment before harvest, in different vegetables (as example: Wanlai et al 2013;Kwack et al 2015;Samuolienė et al 2017;Kitazaki et al 2018), as well as in aromatic herbs (as example: Amaki et al 2011) and microgreens (reviewed by Alrifai et al 2019). In these latter, recent researches on variation in productivity, nutritive and functional quality (mineral-carotenoid-polyphenolic profiles and antioxidant capacity) in novel microgreens (amaranth, cress, mizuna, purslane) in response to select spectral bandwidths (red, blue, blue-red) highlighted that optimized genetic background combined with effective light management might facilitate the production of superior functional microgreens (Kyriacou et al 2019).…”

Section: Vegetable Cropsmentioning

confidence: 99%

Light-Quality Manipulation to Control Plant Growth and Photomorphogenesis in Greenhouse Horticulture: The State of the Art and the Opportunities of Modern LED Systems

Paradiso

Proietti

2021

J Plant Growth Regul

250

121

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Light quantity (intensity and photoperiod) and quality (spectral composition) affect plant growth and physiology and interact with other environmental parameters and cultivation factors in determining the plant behaviour. More than providing the energy for photosynthesis, light also dictates specific signals which regulate plant development, shaping and metabolism, in the complex phenomenon of photomorphogenesis, driven by light colours. These are perceived even at very low intensity by five classes of specific photoreceptors, which have been characterized in their biochemical features and physiological roles. Knowledge about plant photomorphogenesis increased dramatically during the last years, also thanks the diffusion of light-emitting diodes (LEDs), which offer several advantages compared to the conventional light sources, such as the possibility to tailor the light spectrum and to regulate the light intensity, depending on the specific requirements of the different crops and development stages. This knowledge could be profitably applied in greenhouse horticulture to improve production schedules and crop yield and quality. This article presents a brief overview on the effects of light spectrum of artificial lighting on plant growth and photomorphogenesis in vegetable and ornamental crops, and on the state of the art of the research on LEDs in greenhouse horticulture. Particularly, we analysed these effects by approaching, when possible, each single-light waveband, as most of the review works available in the literature considers the influence of combined spectra.

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“…The biochemical parameters, the contents of photosynthetic pigments or sugars indicate the condition of the plants. A high level of phenolic compounds is usually correlated with the high ability to scavenge free radicals which are necessary to reduce the adverse effects of many stresses (Samuolienė et al 2017).…”

Section: Resultsmentioning

confidence: 99%

“…The green light demonstrated about a two-fold lower effect on these parameters. The effects of blue and green radiation in various light combinations on the antioxidant activity of many plant species have been widely reported in the review of Samuolienė et al (2017). Summarising, greenhouse supplemental LED lighting could be effectively used for tomato and eggplant transplant production in the spring.…”

Section: Resultsmentioning

confidence: 99%

LED lighting affected the growth and metabolism of eggplant and tomato transplants in a greenhouse

Wojciechowska¹,

Kołton²,

Długosz-Grochowska³

et al. 2020

Hortic. Sci.

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Light-emitting diodes (LEDs) were used for the spring greenhouse cultivation of eggplant (Solanum melongena L.) ‘Milar F1’ and tomato (S. lycopersicon L.) ‘Benito F1’ transplants. Seedlings were grown under natural light conditions with the supplemental LED light. A 16-h photoperiod provided plants with a DLI of 12.6 (eggplant) and 9.6 (tomato) mol m2/day. Four supplemental light spectra were tested: L1 (90% red + 10% blue); L2 (80% red + 20% blue); L3 (43% red + 42% blue+15% green) and L4 (56% red + 26% blue + 15% green + 3% UV-A). The PPFD in each LED light treatment was 150 ± 20 µmol/m2·s. Compared to the control plants (without LED lighting), the eggplant transplants had about a 25% larger leaf area and a higher level of total phenol content as well as a higher antiradical scavenging activity under the L1 spectrum. The favourable spectrum for the tomato transplants consisted of red to blue in a ratio of 1 : 1 mixed with a green light (L3) – the leaves were characterised by a higher content of dry matter, soluble sugars, photosynthetic pigments and total phenols; also the radical scavenging activity increased in comparison to the control group. It was shown that the supplemental irradiation of transplants was economically acceptable.

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Light-Emitting Diodes (LEDs) for Improved Nutritional Quality

Cited by 15 publications

References 121 publications

LED illumination and plant growth regulators’ effects on growth and phenolic acids accumulation in Moluccella laevis L. in vitro cultures

LED illumination and plant growth regulators’ effects on growth and phenolic acids accumulation in Moluccella laevis L. in vitro cultures

Light-Quality Manipulation to Control Plant Growth and Photomorphogenesis in Greenhouse Horticulture: The State of the Art and the Opportunities of Modern LED Systems

LED lighting affected the growth and metabolism of eggplant and tomato transplants in a greenhouse

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