The effects of red, blue, and white light-emitting diodes on the growth, development, and edible quality of hydroponically grown lettuce (Lactuca sativa L. var. capitata)

Lin, Kuan–Hung; Huang, Mengyuan; Huang, W.; Hsu, Miao Hsing; Yang, Zhijian; Yang, Chi-Ming

doi:10.1016/j.scienta.2012.10.002

Cited by 631 publications

(408 citation statements)

References 39 publications

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“…Light quantity and quality have been known as one the major factors affecting nitrate contents in vegetables due to regulation of nitrate reductase activity (Lin et al, 2013;Santamaria, 2006). In our experiments, it was found that supplemental UV-A irradiance increased the nitrate content in the microgreens, except for pak choi under the higher UV-A irradiance level.…”

Section: Discussionsupporting

confidence: 49%

“…UV-A and blue lightrelated plant responses depend on the same light photoreceptor. Literature data show that blue light increased the nitrogen content and was less efficient in stimulation of nitrate reduction in plants than red light (Lin et al, 2013). On the other hand, UV-A exposure increased the nitrate content in the microgreens, but generally their maximum level was about 400 mg kg -1 and such an increase should not have a negative effect on human health.…”

Section: Discussionmentioning

confidence: 94%

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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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Section: Discussionsupporting

confidence: 49%

Section: Discussionmentioning

confidence: 94%

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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show abstract

“…It is known that a plant with a strong root system generates a greater amount of foliage increasing the absorption of solar radiation for synthesizing photoassimilates (Lin et al, 2013). Thus, an increase in the LAI depends on the interception of radiation, temperature, water availability and nutrition (Hernández and Soto, 2012).…”

Section: Leaf Area Index (Lai)mentioning

confidence: 99%

“…When there is an absence of this nutrient, apart from having a deficiency, there is a decrease in the content of chlorophyll, affecting the photosynthesis process (Peláez et al, 2010). In leaves, it is very important to quantify the chlorophyll because, when it degrades, the leaves change color from a bright green to brown, or other colors (yellow, purple and orange); these color changes mean a loss of quality in the products (Lin et al, 2013).…”

Section: Chlorophyll Content (Cc)mentioning

confidence: 99%

Evaluation of the growth and quality of lettuce (Lactuca sativa L.) in a closed recirculating hydroponic system

Reyes¹,

Álvarez-Herrera²,

Fraile-Robayo³

et al. 2017

Agron. colomb.

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“…Also, the LEDs treatments (red:blue or red:blue:white), were tested for hydroponically grown at Lactuca sativa L. var. capitata (Lin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Studies Regarding Treatments of Led-s Emitted Light on Sprouting Fagopyrum Esculentum Moench

Livadariu¹,

Maximilian²

2017

BUASVMCN-ASB

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The present study presents the influence exercised by LED (light emitting diodes)-s emitted white (W), red (R), blue (B) light on sprouting of buckwheat seeds and evaluated the effects on content of phenolic compounds, antioxidant capacity and flavonoids.The fresh weight of hypocotyls, showed that the R light has generated the best influence for sprouts and W light has generated the most adverse influence. The content of flavonoids was stimulated by R LED for variant sprouts with testa (V3), while both B and R LED inhibited for variant without testa (V4, V6). The higher concentration of polyphenols was obtained for V5 variant illuminated with B LED and increased for V4 variant illuminated with R LED. The antioxidant capacity was higher for V3 variant illuminated with B light and stimulated by R LED in V4 variant.The results contribute to the establishment an efficient working protocol, for obtaining sprouts from buckwheat seeds, with a comprehensive content of bioactive components, various nutrients by applying the R LED treatment.

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The effects of red, blue, and white light-emitting diodes on the growth, development, and edible quality of hydroponically grown lettuce (Lactuca sativa L. var. capitata)

Cited by 631 publications

References 39 publications

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

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

Evaluation of the growth and quality of lettuce (Lactuca sativa L.) in a closed recirculating hydroponic system

Studies Regarding Treatments of Led-s Emitted Light on Sprouting Fagopyrum Esculentum Moench

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