Effect of Light Emitting Diode Radiation on Antioxidant Activity of Barley Leaf

Lee, Na Young; Lee, Mi-Ja; Kim, Yang-Kil; Park, Jong Chul; Park, Hong-Kyu; Choi, Jae-Seong; Hyun, Jong-Nae; Kim, Kee-Jong; Park, Ki-Hun; Ko, Jae-Kwon; Kim, Jung-Gon

doi:10.3839/jksabc.2010.104

Cited by 26 publications

(21 citation statements)

References 28 publications

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“…This is in agreement with the literature, as phenolics are accumulated by a broad range of plants following UV exposure . An increase in phenolic concentration in lettuce was observed after UV‐A LED exposure as well as using UV‐A fluorescent lamps or light filters . Moreover, according to our data, significantly higher carotene but lower tocopherol contents were observed under basal + UV LED treatment (Table ).…”

Section: Discussionsupporting

confidence: 92%

LED illumination affects bioactive compounds in romaine baby leaf lettuce

et al. 2013

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BACKGROUND The effect of light quality on phytochemicals in romaine baby leaf lettuce ‘Thumper’ was investigated in (I) a closed environment and (II, III) a greenhouse (16 h, 21/17 °C): (I) basal (638, 455, 660, 735 nm) LEDs supplemented with UV (380 nm), green (510 nm), yellow (595 nm) or orange (622 nm) LEDs (PPFD of ∼175 µmol m−2 s−1); (II) high‐pressure sodium (HPS) lamps (90 µmol m−2 s−1) supplemented with blue (455, 470nm) or green (505, 530nm) LEDs (30 µmol m−2 s−1); (III) at 3 days before harvesting, HPS lamps (90 µmol m−2 s−1) supplemented with red (638 nm) LEDs (210 µmol m−2 s−1). RESULTS (I) Supplemental UV or orange light enhanced phenolic compounds, supplemental UV or green light enhanced α‐carotene, and supplemental green light enhanced anthocyanins. All supplemental LED colours had a negative effect on tocopherol and ascorbic acid levels. (II) HPS lighting supplemented with different LEDs was not efficient, since the increase in some compounds did not compensate the decrease in major tested phytochemicals. (III) Short‐term irradiation with supplemental 638 nm LEDs before harvesting in the greenhouse did not have a significant effect on phytochemical contents, apart from enhancing tocopherols. CONCLUSION Wavelength control using LED technology affects the production of secondary metabolites, as the metabolism of many nutrients is light‐dependent. The narrow‐bandwidth supplemental light effects were diminished by broader‐spectrum HPS light or natural daylight in the greenhouse. © 2013 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 92%

LED illumination affects bioactive compounds in romaine baby leaf lettuce

et al. 2013

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“…According to the data of Iwai et al (2010), artificial illumination with UV-A enhanced the content of polyphenols in perilla, compared to greenhouse-grown plants. Total phenolic compounds and DPPH radical-scavenging activity of barley leaves cultivated under UV-A only slightly increased than of those grown under fluorescent lamps (Lee et al, 2010). Our data revealed that almost all investigated supplemental UV-A, especially 366 nm, increased the DPPH free-radical scavenging activity of the microgreens.…”

Section: Discussionmentioning

confidence: 49%

“…Some studies of the UV-A effect on plants were carried out using various short-wave cutoff films (Tsormpatsidis et al, 2008). Only in recent years, UV-A LEDs were used for plant growing experiments as a part of different lighting systems (Brazaitytė et al, 2009;Li and Kubota, 2009) or as a sole source of light (Lee et al, 2010;Phyo and Chung, 2013). However, these studies deal with one or another UV-A wavelength effect.…”

Section: Introductionmentioning

confidence: 99%

Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens

Brazaitytė¹,

Viršilė²,

Jankauskienė³

et al. 2015

International Agrophysics

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In this study, we sought to find and employ positive effects of UV-A irradiation on cultivation and quality of microgreens. Therefore, the goal of our study was to investigate the influence of 366, 390, and 402 nm UV-A LED wavelengths, supplemental for the basal solid-state lighting system at two UV-A irradiation levels on the growth and phytochemical contents of different microgreen plants. Depending on the species, supplemental UV-A irradiation can improve antioxidant properties of microgreens. In many cases, a significant increase in the investigated phytochemicals was found under 366 and 390 nm UV-A wavelengths at the photon flux density (12.4 μmol m-2 s-1). The most pronounced effect of supplemental UV-A irradiation was detected in pak choi microgreens. Almost all supplemental UV-A irradiation treatments resulted in increased leaf area and fresh weight, in higher 2,2-diphenyl-1-picrylhydrazyl free-radical scavenging activity, total phenols, anthocyanins, ascorbic acid, and α-tocopherol.

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“…Observations from other studies suggest that when red [25] or blue and green light [26] were added, there was an increase in phenols in the plant under study. In our study, we did not observe the influence of diversified spectral composition of light on the content of phenols.…”

Section: Discussionmentioning

confidence: 93%

“…Photosynthesis was measured in the conditions that the plants were grown. The measurements were taken on the [26][27][28] th days of cultivation.…”

Section: Net Photosynthetic Ratementioning

confidence: 99%

The effect of radiation of LED modules on the growth of dill (Anethum graveolens L.)

Frąszczak¹,

Gąsecka

Golcz

et al. 2016

Open Life Sciences

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Light quality is thought to affect the growth and development of plants. We examined how light influences the growth and content of some chemical compounds in dill (Anethum graveolens L.). The plants were grown under different light quality. The share of orange and green light in the spectrum was constant and amounted to 10% for either colour. In the first combination (A, 70/10), there was 70% of red light and 10% of blue light. Other combinations had the following proportions: B 60/20, C 50/30, D 40/40 and E 30/50 of red and blue light. The PPFD was about 155 μmol m-2 s-1. Blue light inhibited the elongation growth as well as leaf area. It had positive influence on the accumulation of dry mass, glucose and fructose in the herb. In the combinations with higher percentage of red light the plants were characterised by higher content of essential oils, macronutrients and zinc. To sum up, we can say that the proportion of red and blue light has significant influence on the morphological qualities, chemical composition and dynamics of photosynthesis in these plants. On the other hand, the selection of spectral composition of LEDs will depend on the result we want to achieve.

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Effect of Light Emitting Diode Radiation on Antioxidant Activity of Barley Leaf

Cited by 26 publications

References 28 publications

LED illumination affects bioactive compounds in romaine baby leaf lettuce

LED illumination affects bioactive compounds in romaine baby leaf lettuce

Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens

The effect of radiation of LED modules on the growth of dill (Anethum graveolens L.)

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