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The aim of study was to evaluate if the alternation in growth stage–specific lighting spectrum would be superior for tomato growth, photosynthesis, and mineral element contents compared to constant spectrum lighting. Dwarf tomato (Solanum lycopersicum L. cv. Micro Tom) was cultivated in controlled environment chamber (23/19 °C) under light emitting diode lighting. Three lighting spectrum treatments were set, optimized for different tomato growth stages: “seedling” (S; blue (B, 447 nm), red (R, 660 nm) and far red (FR, 740 nm) light), “growth” (G; R, B and FR light, supplemented with 523 nm green) and fruiting (F; R, B, FR light supplemented with 385 nm ultraviolet A (UV-A)). The total photon flux density of 250 μmol m−2·s−1 was maintained in all treatments. Three lighting spectrums were alternated in seedling (S, G, F), biomass growth (SS, SG, GG, FF) and fruiting (SSS, SGG, GGG, GGF, FFF, SGF) stages of tomato creating growth stage-specific or constant lighting spectrum strategies. The light effects depended on tomato age, however the alternation in growth stage-specific lighting spectrum did not have a pronounced impact on dwarf tomato photosynthetic indices, growth, yield and mineral element content. The investigated parameters mainly depended on the spectrum of the latter growth stage.
Giedrė Samuolienė; Jurga Miliauskienė; Algirdas Kazlauskas; Akvilė Viršilė. Growth Stage Specific Lighting Spectra Affect Photosynthetic Performance, Growth and Mineral Element Contents in Tomato. Agronomy 2021, 11, 901 .
AMA StyleGiedrė Samuolienė, Jurga Miliauskienė, Algirdas Kazlauskas, Akvilė Viršilė. Growth Stage Specific Lighting Spectra Affect Photosynthetic Performance, Growth and Mineral Element Contents in Tomato. Agronomy. 2021; 11 (5):901.
Chicago/Turabian StyleGiedrė Samuolienė; Jurga Miliauskienė; Algirdas Kazlauskas; Akvilė Viršilė. 2021. "Growth Stage Specific Lighting Spectra Affect Photosynthetic Performance, Growth and Mineral Element Contents in Tomato." Agronomy 11, no. 5: 901.
In this study, we sought to evaluate and compare the effects of constant and dynamic lighting on red and green leaf lettuce (Lactuca sativa L. Red Cos and Lobjoits Green cos) cultivated in a controlled environment. Plants were illuminated with the combination of red 662 and 638 nm, blue 452 nm, and far-red 737 nm at 16 h photoperiod and constant daily light integral (DLI) of each component. Five constant or dynamic lighting treatments were performed: (BR) constant flux of both B452 and R662; (B*R) constant flux of R662, but the DLI of B452 condensed in 8 h in the middle of photoperiod doubling the PPFD of blue light; (BR*) constant flux of B452, but the DLI of R662 light condensed in the middle of photoperiod; (BdynR) constant flux of R662, but the flux of B452 varies in the sinusoidal profile during 16 h photoperiod, imitating diurnal increase and decrease in lighting intensity; and (BRdyn) constant flux of B452, but the flux of R662 varies in sinusoidal profile. The lettuce’s response to dynamic lighting strategies was cultivar specific. Dynamic lighting strategies, mimicking natural lighting fluctuations, did not have a remarkable effect on photosynthesis and antioxidative parameters, but the dynamic flux of blue light component had a pronounced effect on higher macro and microelement contents in lettuce leaves.
Akvilė Viršilė; Jurga Miliauskienė; Perttu Juhani Haimi; Kristina Laužikė; Giedrė Samuolienė. The Comparison of Constant and Dynamic Red and Blue Light Irradiation Effects on Red and Green Leaf Lettuce. Agronomy 2020, 10, 1802 .
AMA StyleAkvilė Viršilė, Jurga Miliauskienė, Perttu Juhani Haimi, Kristina Laužikė, Giedrė Samuolienė. The Comparison of Constant and Dynamic Red and Blue Light Irradiation Effects on Red and Green Leaf Lettuce. Agronomy. 2020; 10 (11):1802.
Chicago/Turabian StyleAkvilė Viršilė; Jurga Miliauskienė; Perttu Juhani Haimi; Kristina Laužikė; Giedrė Samuolienė. 2020. "The Comparison of Constant and Dynamic Red and Blue Light Irradiation Effects on Red and Green Leaf Lettuce." Agronomy 10, no. 11: 1802.
The objective of this study was to evaluate how different UV-A wavelengths influence the morphology and photosynthetic behavior of red-leaf lettuce (Lactuca sativa L. cv. Maiko). In the experiments, the main photosynthetic photon flux consisted of red (R) and blue (B) light, supplemented with equal doses of different UV-A wavelengths (402, 387 and 367 nm). Treating the crops with low dosages of specific narrow-band UV-A radiation at key points in the life cycle initiated a cascade of responses in the above-ground biomass. According to the results, red-leaf lettuces acclimated to longer UV-A wavelengths by increasing biomass production, whereas different UV-A wavelengths had no significant effect on plant senescence reflectance, nor on the normalized difference vegetation index. A significant decrease in the maximum quantum yield of the PSII photochemistry of dark (Fv/Fm) and light (ΦPSII) adapted plants was observed. A lack of significant changes in non-photochemical fluorescence quenching indicates that photo-inhibition occurred under RBUV367, whereas the photosynthetic response under RB, RBUV402, and RBUV387 suggests that there was no damage to PSII. The correlation of the photosynthetic rate (Pr) with the stomatal conductance (gs) indicated that the increase in the Pr of lettuce under supplemental UV-A radiation was due to the increase of gs, instead of the ratio of the intracellular to ambient CO2 content (Ci/Ca) or stomatal limitations.
Giedrė Samuolienė; Akvilė Viršilė; Jurga Miliauskienė; Perttu Haimi; Kristina Laužikė; Julė Jankauskienė; Algirdas Novičkovas; Asta Kupčinskienė; Aušra Brazaitytė. The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation. Agronomy 2020, 10, 761 .
AMA StyleGiedrė Samuolienė, Akvilė Viršilė, Jurga Miliauskienė, Perttu Haimi, Kristina Laužikė, Julė Jankauskienė, Algirdas Novičkovas, Asta Kupčinskienė, Aušra Brazaitytė. The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation. Agronomy. 2020; 10 (6):761.
Chicago/Turabian StyleGiedrė Samuolienė; Akvilė Viršilė; Jurga Miliauskienė; Perttu Haimi; Kristina Laužikė; Julė Jankauskienė; Algirdas Novičkovas; Asta Kupčinskienė; Aušra Brazaitytė. 2020. "The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation." Agronomy 10, no. 6: 761.
In this study we explore the effects of multi-colour LED lighting spectrum on nutritive primary metabolites in green (‘Lobjoits green cos’) and red (‘Red cos’) leaf lettuce (Lactuca sativa L.), cultivated in controlled environment. The basal lighting, consisting of blue 455 nm, red 627 and 660 nm and far red 735 nm LEDs, was supplemented with UV-A 380 nm, green 510 nm, yellow 595 nm or orange 622 nm LED wavelengths at total photosynthetic photon flux density of 300 μmol m−2 s−1. Supplemental lighting colours did not affect lettuce growth; however had distinct impact on nitrite, amino acid, organic acid, and soluble sugar contents. Orange, green and UV-A light had differential effects on red and green leaf lettuce metabolism and interplay with nutritional value and safety of lettuce production. The metabolic response was cultivar specific; however green light had reasonable impact on the contents of nutritive primary metabolites in red and green leaf lettuce.
Akvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė-Kairienė; Jurga Miliauskienė; Julė Jankauskienė; Algirdas Novičkovas; Kristina Laužikė; Giedrė Samuolienė. The distinct impact of multi-color LED light on nitrate, amino acid, soluble sugar and organic acid contents in red and green leaf lettuce cultivated in controlled environment. Food Chemistry 2019, 310, 125799 .
AMA StyleAkvilė Viršilė, Aušra Brazaitytė, Viktorija Vaštakaitė-Kairienė, Jurga Miliauskienė, Julė Jankauskienė, Algirdas Novičkovas, Kristina Laužikė, Giedrė Samuolienė. The distinct impact of multi-color LED light on nitrate, amino acid, soluble sugar and organic acid contents in red and green leaf lettuce cultivated in controlled environment. Food Chemistry. 2019; 310 ():125799.
Chicago/Turabian StyleAkvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė-Kairienė; Jurga Miliauskienė; Julė Jankauskienė; Algirdas Novičkovas; Kristina Laužikė; Giedrė Samuolienė. 2019. "The distinct impact of multi-color LED light on nitrate, amino acid, soluble sugar and organic acid contents in red and green leaf lettuce cultivated in controlled environment." Food Chemistry 310, no. : 125799.
This study evaluated the effects of light intensity and the spectrum produced by light-emitting diodes (LEDs) on the growth and nitrate assimilation of tatsoi (Brassica rapa var. rosularis), grown in a controlled environment. A system of high-powered solid-state lighting modules with blue 445, red 640 and 660 and far-red 731 nm LEDs were used for illumination. Two experiments were performed seeking to explore the light parameter effects on tatsoi growth, nitrate, nitrite, total protein, and free amino acid contents, as well as soluble sugar contents and chlorophyll indexes: (1) investigation of the effects of a photosynthetically active photon flux density (PPFD) of 100, 200, 300, 400 and 500 μmol m–2 s–1 and (2) evaluation of the effects of different combinations of red (R660 and R660 + R640), red supplemented with blue (R660 + B445 and R660 + R640+B445) and far red (R660 + R640+B445+FR731) LEDs. A deficient light intensity resulted in nitrate and nitrite accumulation in tatsoi leaves; under the exposure of 100 μmol m–2 s–1 PPFD, tatsoi contained 3.4 times higher NO3 and 34 times higher NO2 contents, compared to that under 200 μmol m–2 s–1. The photosynthetic photon flux density of ∼300 μmol m2 s−1 allowed the obtaining of an optimal tatsoi production with high biomass and minimal nitrate and nitrite contents in the leaves. Long term exposure of sole red light was stressful for tatsoi growth; however the addition of blue light to the red 660- and 640- nm LEDs resulted in the highest total protein and essential amino acid contents, leaf area and biomass, and significantly reduced nitrate but increased nitrite content.
Akvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė-Kairienė; Julė Jankauskienė; Jurga Miliauskienė; Giedrė Samuolienė; Algirdas Novičkovas; Pavelas Duchovskis. Nitrate, nitrite, protein, amino acid contents, and photosynthetic and growth characteristics of tatsoi cultivated under various photon flux densities and spectral light compositions. Scientia Horticulturae 2019, 258, 108781 .
AMA StyleAkvilė Viršilė, Aušra Brazaitytė, Viktorija Vaštakaitė-Kairienė, Julė Jankauskienė, Jurga Miliauskienė, Giedrė Samuolienė, Algirdas Novičkovas, Pavelas Duchovskis. Nitrate, nitrite, protein, amino acid contents, and photosynthetic and growth characteristics of tatsoi cultivated under various photon flux densities and spectral light compositions. Scientia Horticulturae. 2019; 258 ():108781.
Chicago/Turabian StyleAkvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė-Kairienė; Julė Jankauskienė; Jurga Miliauskienė; Giedrė Samuolienė; Algirdas Novičkovas; Pavelas Duchovskis. 2019. "Nitrate, nitrite, protein, amino acid contents, and photosynthetic and growth characteristics of tatsoi cultivated under various photon flux densities and spectral light compositions." Scientia Horticulturae 258, no. : 108781.
Understanding plant responses to light quantity in indoor horticultural systems is important for optimising lettuce growth and metabolism as well as energy utilisation efficiency. Light intensity and photoperiod sufficient for normal plant growth parameters might be not efficient for nitrate assimilation. Therefore, this study explored and compared the effects of different light intensities (100-500 μmol m-2 s-1 ) and photoperiods (12-24 h) on the growth and nitrate assimilation in red and green leaf lettuce (Lactuca sativa L.). For efficient nitrate assimilation, 300-400 μmol m-2 s-1 photosynthetic photon flux density (PPFD) and 16-18 h photoperiod is necessary for red and green lettuces. The insufficient light quantity resulted in reduced growth and remarkable increase in nitrate and nitrite contents in both cultivars. Short photoperiods, similarly to low PPFD, growth parameters, chlorophyll indices and nitrate assimilation indices showed the shortage of photosynthetic products for normal plant physiological processes. Short photoperiods had the least pronounced effect on nitrate and nitrite contents in lettuce leaves. Light intensity was superior compared to photoperiods for efficient nitrate assimilation in both lettuce cultivars. Under short photoperiods, similarly to low intensity, growth parameters, chlorophyll index and nitrate assimilation indices showed a shortage of photosynthetic products for normal physiological processes. The free amino acid concentration increased, but it was not efficiently incorporated in proteins, as their level in lettuce was lower compared to those for moderate photoperiods. © 2019 Society of Chemical Industry.
Akvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė‐Kairienė; Jurga Miliauskienė; Julė Jankauskienė; Algirdas Novičkovas; Giedrė Samuolienė. Lighting intensity and photoperiod serves tailoring nitrate assimilation indices in red and green baby leaf lettuce. Journal of the Science of Food and Agriculture 2019, 99, 6608 -6619.
AMA StyleAkvilė Viršilė, Aušra Brazaitytė, Viktorija Vaštakaitė‐Kairienė, Jurga Miliauskienė, Julė Jankauskienė, Algirdas Novičkovas, Giedrė Samuolienė. Lighting intensity and photoperiod serves tailoring nitrate assimilation indices in red and green baby leaf lettuce. Journal of the Science of Food and Agriculture. 2019; 99 (14):6608-6619.
Chicago/Turabian StyleAkvilė Viršilė; Aušra Brazaitytė; Viktorija Vaštakaitė‐Kairienė; Jurga Miliauskienė; Julė Jankauskienė; Algirdas Novičkovas; Giedrė Samuolienė. 2019. "Lighting intensity and photoperiod serves tailoring nitrate assimilation indices in red and green baby leaf lettuce." Journal of the Science of Food and Agriculture 99, no. 14: 6608-6619.
Lukas Simanavicius; Akvilė Viršilė. The effects of led lighting on nitrates, nitrites and organic acids in tatsoi. 2018, 1 .
AMA StyleLukas Simanavicius, Akvilė Viršilė. The effects of led lighting on nitrates, nitrites and organic acids in tatsoi. . 2018; ():1.
Chicago/Turabian StyleLukas Simanavicius; Akvilė Viršilė. 2018. "The effects of led lighting on nitrates, nitrites and organic acids in tatsoi." , no. : 1.
Akvilė Viršilė; Margit Olle; Pavelas Duchovskis. LED Lighting in Horticulture. Light Emitting Diodes for Agriculture 2017, 113 -147.
AMA StyleAkvilė Viršilė, Margit Olle, Pavelas Duchovskis. LED Lighting in Horticulture. Light Emitting Diodes for Agriculture. 2017; ():113-147.
Chicago/Turabian StyleAkvilė Viršilė; Margit Olle; Pavelas Duchovskis. 2017. "LED Lighting in Horticulture." Light Emitting Diodes for Agriculture , no. : 113-147.
Mustard, beet and parsley were grown to harvest time under selected LEDs: 638+660+731+0% 445nm; 638+660+731+8% 445nm; 638+660+731+16% 445nm; 638+660+731+25% 445nm; 638+660+731+33% 445nm. From 1.2 to 4.3 times higher concentrations of chlorophylls a and b, carotenoids, α- and β-carotenes, lutein, violaxanthin and zeaxanthin was found under blue 33% treatment in comparison to lower blue light dosages. Meanwhile, the accumulation of metabolites, which were not directly connected with light reactions, such as tocopherols, was more influenced by lower (16%) blue light dosage, increasing about 1.3 times. Thus, microgreen enrichment of carotenoid and xanthophyll pigments may be achieved using higher (16-33%) blue light intensities. Changes in metabolite quantities were not the result of changes of other carotenoid concentration, but were more influenced by light treatment and depended on the species. Significant quantitative changes in response to blue light percentage were obtained for both directly and not directly light-dependent metabolite groups.
Giedrė Samuolienė; Akvilė Viršilė; Aušra Brazaitytė; Julė Jankauskienė; Sandra Sakalauskienė; Viktorija Vaštakaitė-Kairienė; Algirdas Novičkovas; Alina Viškelienė; Audrius Sasnauskas; Pavelas Duchovskis. Blue light dosage affects carotenoids and tocopherols in microgreens. Food Chemistry 2017, 228, 50 -56.
AMA StyleGiedrė Samuolienė, Akvilė Viršilė, Aušra Brazaitytė, Julė Jankauskienė, Sandra Sakalauskienė, Viktorija Vaštakaitė-Kairienė, Algirdas Novičkovas, Alina Viškelienė, Audrius Sasnauskas, Pavelas Duchovskis. Blue light dosage affects carotenoids and tocopherols in microgreens. Food Chemistry. 2017; 228 ():50-56.
Chicago/Turabian StyleGiedrė Samuolienė; Akvilė Viršilė; Aušra Brazaitytė; Julė Jankauskienė; Sandra Sakalauskienė; Viktorija Vaštakaitė-Kairienė; Algirdas Novičkovas; Alina Viškelienė; Audrius Sasnauskas; Pavelas Duchovskis. 2017. "Blue light dosage affects carotenoids and tocopherols in microgreens." Food Chemistry 228, no. : 50-56.
Akvilė Viršilė; A. Brazaitytė; R. Sirtautas; P. Duchovskis. Light spectral effects on phenolic compounds inPerilla frutescensleaves as related to the leaf age, color and duration of exposure. Acta Horticulturae 2017, 981 -988.
AMA StyleAkvilė Viršilė, A. Brazaitytė, R. Sirtautas, P. Duchovskis. Light spectral effects on phenolic compounds inPerilla frutescensleaves as related to the leaf age, color and duration of exposure. Acta Horticulturae. 2017; (1170):981-988.
Chicago/Turabian StyleAkvilė Viršilė; A. Brazaitytė; R. Sirtautas; P. Duchovskis. 2017. "Light spectral effects on phenolic compounds inPerilla frutescensleaves as related to the leaf age, color and duration of exposure." Acta Horticulturae , no. 1170: 981-988.
A novel research of pulsed light-emitting diode (LED) lighting versus continuous lighting was conducted by analyzing phytochemical levels in microgreens. Red pak choi (Brassica rapa var. chinensis), mustard (Brassica juncea L.), and tatsoi (Brassica rapa var. rosularis) were grown indoors under HPS lamps supplemented with monochromatic (455, 470, 505, 590, and 627 nm) LEDs [total photosynthetic photon flux density (PPFD) of 200 ± 10 μmol m–2 s–1, for 16 h day–1]. For pulsed light treatments, the frequencies at 2, 32, 256, and 1024 Hz with a duty cycle of 50% monochromatic LEDs were applied. The results were compared to those under the continuous light (0 Hz) condition in terms of total phenolic content, anthocyanins, and antiradical activity (DPPH). The summarized data suggested that pulsed light affected accumulation of secondary metabolites both positive and negative in microgreens. The significant differences in the response of phytochemicals between pulsed light at several frequencies and continuous light were determined. The most positive effects of 2, 256, and 1024 Hz for total phenolic compounds in mustard under all wavelength LEDs were achieved. The LED frequencies at 2 and 32 Hz were the most suitable for accumulation of anthocyanins in red pak choi and tatsoi. The highest antiradical activity under the treatments of 32, 256, and 1024 Hz in mustard and under the 2 Hz frequency in red pak choi and tatsoi was determined.
Viktorija Vaštakaitė; Akvilė Viršilė; Aušra Brazaitytė; Giedrė Samuolienė; Julė Jankauskienė; Algirdas Novičkovas; Pavelas Duchovskis. Pulsed Light-Emitting Diodes for a Higher Phytochemical Level in Microgreens. Journal of Agricultural and Food Chemistry 2017, 65, 6529 -6534.
AMA StyleViktorija Vaštakaitė, Akvilė Viršilė, Aušra Brazaitytė, Giedrė Samuolienė, Julė Jankauskienė, Algirdas Novičkovas, Pavelas Duchovskis. Pulsed Light-Emitting Diodes for a Higher Phytochemical Level in Microgreens. Journal of Agricultural and Food Chemistry. 2017; 65 (31):6529-6534.
Chicago/Turabian StyleViktorija Vaštakaitė; Akvilė Viršilė; Aušra Brazaitytė; Giedrė Samuolienė; Julė Jankauskienė; Algirdas Novičkovas; Pavelas Duchovskis. 2017. "Pulsed Light-Emitting Diodes for a Higher Phytochemical Level in Microgreens." Journal of Agricultural and Food Chemistry 65, no. 31: 6529-6534.
The purpose of this study was to evaluate the role of 638-nm and 665-nm LEDs on changes of antioxidants of basil (Ocimum basilicum) and parsley (Petroselinum crispum), and to assess the effect of light quality on antioxidative status. Plants were grown in peat substrate for 19 days (21/17 ±2°C, 16 h). Experiments were performed in (I) a controlled-environment: B455,R638,R665,FR731(control); B455,R*638,R665,FR731; B455,R638,R*665,FR731; R638; R665 (B–blue, R- red, FR–far-red light). PPFD was set from 231 during growth, upto 300 μmol m-2 s-1 during 3-day treatment changing R638 or R665PPFD level; in (II) greenhouse (November): high-pressure sodium lamps (HPS) (control—300 μmol m−2s−1); and HPS + 638 (HPS generated 90 and red LEDs—210 μmol m−2s−1). In general, under supplemental or increased red 638 nm light, amounts of tested antioxidants were greater in basil, whereas sole 665 nm or sole 638 nm is more favourable for parsley. Increased or supplemental red light significantly increased contents of phenolics, α-tocopherol, ascorbic acid and DPPH• but suppressed accumulation of lutein and β-carotene in basil, whereas an increase of β-carotene and DPPH• was observed in parsley. Hereby, the photoresponse of antioxidant compounds suggests that photoprotective mechanism is stimulated by both light-dose-dependent and wavelength-dependent reactions.
Giedė Samuolienė; Aušra Brazaitytė; Akvilė Viršilė; Julė Jankauskienė; Sandra Sakalauskienė; Pavelas Duchovskis. Red Light-Dose or Wavelength-Dependent Photoresponse of Antioxidants in Herb Microgreens. PLoS ONE 2016, 11, e0163405 .
AMA StyleGiedė Samuolienė, Aušra Brazaitytė, Akvilė Viršilė, Julė Jankauskienė, Sandra Sakalauskienė, Pavelas Duchovskis. Red Light-Dose or Wavelength-Dependent Photoresponse of Antioxidants in Herb Microgreens. PLoS ONE. 2016; 11 (9):e0163405.
Chicago/Turabian StyleGiedė Samuolienė; Aušra Brazaitytė; Akvilė Viršilė; Julė Jankauskienė; Sandra Sakalauskienė; Pavelas Duchovskis. 2016. "Red Light-Dose or Wavelength-Dependent Photoresponse of Antioxidants in Herb Microgreens." PLoS ONE 11, no. 9: e0163405.
A. Brazaitytė; S. Sakalauskienė; A. Viršilė; J. Jankauskienė; G. Samuolienė; R. Sirtautas; V. Vaštakaitė; J. Miliauskienė; P. Duchovskis; A. Novičkovas; L. Dabašinskas. The effect of short-term red lighting onBrassicaceaemicrogreens grown indoors. Acta Horticulturae 2016, 177 -184.
AMA StyleA. Brazaitytė, S. Sakalauskienė, A. Viršilė, J. Jankauskienė, G. Samuolienė, R. Sirtautas, V. Vaštakaitė, J. Miliauskienė, P. Duchovskis, A. Novičkovas, L. Dabašinskas. The effect of short-term red lighting onBrassicaceaemicrogreens grown indoors. Acta Horticulturae. 2016; (1123):177-184.
Chicago/Turabian StyleA. Brazaitytė; S. Sakalauskienė; A. Viršilė; J. Jankauskienė; G. Samuolienė; R. Sirtautas; V. Vaštakaitė; J. Miliauskienė; P. Duchovskis; A. Novičkovas; L. Dabašinskas. 2016. "The effect of short-term red lighting onBrassicaceaemicrogreens grown indoors." Acta Horticulturae , no. 1123: 177-184.
A. Brazaitytė; A. Viršilė; G. Samuolienė; J. Jankauskienė; S. Sakalauskienė; R. Sirtautas; A. Novičkovas; L. Dabašinskas; V. Vaštakaitė; J. Miliauskienė; P. Duchovskis. Light quality: growth and nutritional value of microgreens under indoor and greenhouse conditions. Acta Horticulturae 2016, 277 -284.
AMA StyleA. Brazaitytė, A. Viršilė, G. Samuolienė, J. Jankauskienė, S. Sakalauskienė, R. Sirtautas, A. Novičkovas, L. Dabašinskas, V. Vaštakaitė, J. Miliauskienė, P. Duchovskis. Light quality: growth and nutritional value of microgreens under indoor and greenhouse conditions. Acta Horticulturae. 2016; (1134):277-284.
Chicago/Turabian StyleA. Brazaitytė; A. Viršilė; G. Samuolienė; J. Jankauskienė; S. Sakalauskienė; R. Sirtautas; A. Novičkovas; L. Dabašinskas; V. Vaštakaitė; J. Miliauskienė; P. Duchovskis. 2016. "Light quality: growth and nutritional value of microgreens under indoor and greenhouse conditions." Acta Horticulturae , no. 1134: 277-284.
G. Samuolienė; A. Brazaitytė; A. Viršilė; R. Sirtautas; J. Sakalauskaitė; S. Sakalauskienė; P. Duchovskis. PHOTOMORPHOGENETIC EFFECTS IN DIFFERENT PLANT LIFE FORMS. Acta Horticulturae 2015, 129 -135.
AMA StyleG. Samuolienė, A. Brazaitytė, A. Viršilė, R. Sirtautas, J. Sakalauskaitė, S. Sakalauskienė, P. Duchovskis. PHOTOMORPHOGENETIC EFFECTS IN DIFFERENT PLANT LIFE FORMS. Acta Horticulturae. 2015; (1099):129-135.
Chicago/Turabian StyleG. Samuolienė; A. Brazaitytė; A. Viršilė; R. Sirtautas; J. Sakalauskaitė; S. Sakalauskienė; P. Duchovskis. 2015. "PHOTOMORPHOGENETIC EFFECTS IN DIFFERENT PLANT LIFE FORMS." Acta Horticulturae , no. 1099: 129-135.
The objective of this study was to evaluate the effects of irradiance levels and spectra produced by solid-state light-emitting diodes (LEDs) on carotenoid content and composition changes in Brassicaceae microgreens. A system of five high-power, solid-state lighting modules with standard 447-, 638-, 665-, and 731-nm LEDs was used in the experiments. Two experiments were performed: (1) evaluation of LED irradiance levels of 545, 440, 330, 220, and 110 μmol m(-2) s(-1) photosynthetically active flux density (PPFD) and (2) evaluation of the effects of 520-, 595-, and 622-nm LEDs supplemental to the standard set of LEDs. Concentrations of various carotenoids in red pak choi and tatsoi were higher under illumination of 330-440 μmol m(-2) s(-1) and at 110-220 μmol m(-2) s(-1) in mustard. All supplemental wavelengths increased total carotenoid content in mustard but decreased it in red pak choi. Carotenoid content increased in tatsoi under supplemental yellow light.
Aušra Brazaitytė; Sandra Sakalauskienė; Giedrė Samuolienė; Julė Jankauskienė; Akvilė Viršilė; Algirdas Novičkovas; Ramūnas Sirtautas; Jurga Miliauskienė; Viktorija Vaštakaitė-Kairienė; Laurynas Dabašinskas; Pavelas Duchovskis. The effects of LED illumination spectra and intensity on carotenoid content in Brassicaceae microgreens. Food Chemistry 2015, 173, 600 -606.
AMA StyleAušra Brazaitytė, Sandra Sakalauskienė, Giedrė Samuolienė, Julė Jankauskienė, Akvilė Viršilė, Algirdas Novičkovas, Ramūnas Sirtautas, Jurga Miliauskienė, Viktorija Vaštakaitė-Kairienė, Laurynas Dabašinskas, Pavelas Duchovskis. The effects of LED illumination spectra and intensity on carotenoid content in Brassicaceae microgreens. Food Chemistry. 2015; 173 ():600-606.
Chicago/Turabian StyleAušra Brazaitytė; Sandra Sakalauskienė; Giedrė Samuolienė; Julė Jankauskienė; Akvilė Viršilė; Algirdas Novičkovas; Ramūnas Sirtautas; Jurga Miliauskienė; Viktorija Vaštakaitė-Kairienė; Laurynas Dabašinskas; Pavelas Duchovskis. 2015. "The effects of LED illumination spectra and intensity on carotenoid content in Brassicaceae microgreens." Food Chemistry 173, no. : 600-606.
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.
Ausra Brazaitytė; Akvilė Viršilė; Julė Jankauskienė; Sandra Sakalauskienė; Giedrė Samuolienė; R. Sirtautas; A. Novičkovas; L. Dabašinskas; J. Miliauskienė; Viktorija Vaštakaitė-Kairienė; Aistė Bagdonavicienė; P. Duchovskis. Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens. International Agrophysics 2015, 29, 13 -22.
AMA StyleAusra Brazaitytė, Akvilė Viršilė, Julė Jankauskienė, Sandra Sakalauskienė, Giedrė Samuolienė, R. Sirtautas, A. Novičkovas, L. Dabašinskas, J. Miliauskienė, Viktorija Vaštakaitė-Kairienė, Aistė Bagdonavicienė, P. Duchovskis. Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens. International Agrophysics. 2015; 29 (1):13-22.
Chicago/Turabian StyleAusra Brazaitytė; Akvilė Viršilė; Julė Jankauskienė; Sandra Sakalauskienė; Giedrė Samuolienė; R. Sirtautas; A. Novičkovas; L. Dabašinskas; J. Miliauskienė; Viktorija Vaštakaitė-Kairienė; Aistė Bagdonavicienė; P. Duchovskis. 2015. "Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens." International Agrophysics 29, no. 1: 13-22.
Ramūnas Sirtautas; Akvilė Viršilė; Giedrė Samuolienė; Aušra Brazaitytė; Jurga Miliauskienė; Sandra Sakalauskienė; Pavelas Duchovskis. Growing of leaf lettuce (Lactuca sativa L.) under high-pressure sodium lamps with supplemental blue, cyan and green LEDs. Zemdirbyste-Agriculture 2014, 101, 75 -78.
AMA StyleRamūnas Sirtautas, Akvilė Viršilė, Giedrė Samuolienė, Aušra Brazaitytė, Jurga Miliauskienė, Sandra Sakalauskienė, Pavelas Duchovskis. Growing of leaf lettuce (Lactuca sativa L.) under high-pressure sodium lamps with supplemental blue, cyan and green LEDs. Zemdirbyste-Agriculture. 2014; 101 (1):75-78.
Chicago/Turabian StyleRamūnas Sirtautas; Akvilė Viršilė; Giedrė Samuolienė; Aušra Brazaitytė; Jurga Miliauskienė; Sandra Sakalauskienė; Pavelas Duchovskis. 2014. "Growing of leaf lettuce (Lactuca sativa L.) under high-pressure sodium lamps with supplemental blue, cyan and green LEDs." Zemdirbyste-Agriculture 101, no. 1: 75-78.
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.
Giedrė Samuolienė; Aušra Brazaitytė; Julė Jankauskienė; Akvilė Viršilė; Ramūnas Sirtautas; Algirdas Novičkovas; Sandra Sakalauskienė; Jurga Sakalauskaitė; Pavelas Duchovskis. LED irradiance level affects growth and nutritional quality of Brassica microgreens. Open Life Sciences 2013, 8, 1241 -1249.
AMA StyleGiedrė Samuolienė, Aušra Brazaitytė, Julė Jankauskienė, Akvilė Viršilė, Ramūnas Sirtautas, Algirdas Novičkovas, Sandra Sakalauskienė, Jurga Sakalauskaitė, Pavelas Duchovskis. LED irradiance level affects growth and nutritional quality of Brassica microgreens. Open Life Sciences. 2013; 8 (12):1241-1249.
Chicago/Turabian StyleGiedrė Samuolienė; Aušra Brazaitytė; Julė Jankauskienė; Akvilė Viršilė; Ramūnas Sirtautas; Algirdas Novičkovas; Sandra Sakalauskienė; Jurga Sakalauskaitė; Pavelas Duchovskis. 2013. "LED irradiance level affects growth and nutritional quality of Brassica microgreens." Open Life Sciences 8, no. 12: 1241-1249.
The aim of this study is to present the light emitting diode (LED) technology for greenhouse plant lighting and to give an overview about LED light effects on photosynthetic indices, growth, yield and nutritional value in green vegetables and tomato, cucumber, sweet pepper transplants. The sole LED lighting, applied in closed growth chambers, as well as combinations of LED wavelengths with conventional light sources, fluorescent and high pressure sodium lamp light, and natural illumination in greenhouses are overviewed. Red and blue light are basal in the lighting spectra for green vegetables and tomato, cucumber, and pepper transplants; far red light, important for photomorphogenetic processes in plants also results in growth promotion. However, theoretically unprofitable spectral parts as green or yellow also have significant physiological effects on investigated plants. Presented results disclose the variability of light spectral effects on different plant species and different physiological indices.
Margit Olle; Akvilė Viršilė. The effects of light-emitting diode lighting on greenhouse plant growth and quality. Agricultural and Food Science 2013, 22, 223 -234.
AMA StyleMargit Olle, Akvilė Viršilė. The effects of light-emitting diode lighting on greenhouse plant growth and quality. Agricultural and Food Science. 2013; 22 (2):223-234.
Chicago/Turabian StyleMargit Olle; Akvilė Viršilė. 2013. "The effects of light-emitting diode lighting on greenhouse plant growth and quality." Agricultural and Food Science 22, no. 2: 223-234.