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Jurga Miliauskienė
Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, 54333 Babtai, Lithuania

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Journal article
Published: 04 May 2021 in Agronomy
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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.

ACS Style

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 Style

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 (5):901.

Chicago/Turabian Style

Giedrė 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.

Journal article
Published: 19 April 2021 in Plants
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The consumption of microgreens has increased due to their having higher levels of bioactive compounds and mineral nutrients than mature plants. The lighting conditions during the cultivation of microgreens, if optimally selected, can have a positive effect by further increasing their nutritional value. Thus, our study aimed to determine the changes in mineral nutrients contents of Brassicaceae microgreens depending on different blue–red (B:R) light ratios in light-emitting diode (LED) lighting and to evaluate their growth and nutritional value according to different indexes. Experiments were performed in controlled environment growth chambers at IH LRCAF, 2020. Microgreens of mustard (Brassica juncea ‘Red Lace’) and kale (Brassica napus ‘Red Russian’) were grown hydroponically under different B:R light ratios: 0%B:100%R, 10%B:90%R, 25%B:75%R, 50%B:50%R, 75%B:25%R, and 100%B:0%R. A 220 μmol m−2 s−1 total photon flux density (TPFD), 18 h photoperiod, 21/17 ± 2 °C temperature and 60% ± 5% relative humidity in the growth chamber were maintained during cultivation. We observed that an increasing percentage of blue light in the LED illumination spectrum during growth was associated with reduced elongation in the microgreens of both species and had a positive effect on the accumulation of mostly macro- and micronutrients. However, different B:R light ratios indicate a species-dependent response to changes in growth parameters such as leaf area, fresh and dry mass, and optical leaf indexes such as for chlorophyll, flavonol, anthocyanin, and carotenoid reflectance.

ACS Style

Aušra Brazaitytė; Jurga Miliauskienė; Viktorija Vaštakaitė-Kairienė; Rūta Sutulienė; Kristina Laužikė; Pavelas Duchovskis; Stanisław Małek. Effect of Different Ratios of Blue and Red LED Light on Brassicaceae Microgreens under a Controlled Environment. Plants 2021, 10, 801 .

AMA Style

Aušra Brazaitytė, Jurga Miliauskienė, Viktorija Vaštakaitė-Kairienė, Rūta Sutulienė, Kristina Laužikė, Pavelas Duchovskis, Stanisław Małek. Effect of Different Ratios of Blue and Red LED Light on Brassicaceae Microgreens under a Controlled Environment. Plants. 2021; 10 (4):801.

Chicago/Turabian Style

Aušra Brazaitytė; Jurga Miliauskienė; Viktorija Vaštakaitė-Kairienė; Rūta Sutulienė; Kristina Laužikė; Pavelas Duchovskis; Stanisław Małek. 2021. "Effect of Different Ratios of Blue and Red LED Light on Brassicaceae Microgreens under a Controlled Environment." Plants 10, no. 4: 801.

Journal article
Published: 13 April 2021 in Plants
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The effect of multicolor pulsed light-emitting diode (LED) irradiation on lettuce “Defender” growth, photosynthetic performance and antioxidant properties was studied. The experiments were designed to compare the continuous and pulsed lighting (0.5, 1 kHz; 50% duty ratio) effects of B450, G520, R660 and FR735 lighting components, maintaining total diurnal integral light quantity (DLI 14.4 mol m−2 day−1) constant during the 16-h photoperiod. The results showed that lettuce grown under pulsed irradiation displayed superior growth performance, including a significant enhancement of fresh (~32%) and dry biomass (~36%) and leaf area (~48%). Lettuce cultivated in both pulsed light treatments was characterized by the higher photosynthetic rate, chlorophyll (a,b) and carotenoid concentration. However, the total phenol and antioxidant properties in lettuce were more dependent on the specific pulsed light frequency. Only treatment with 1 kHz frequency was effective for higher phenol content, 2,20-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) free radical scavenging activity and Fe2+ reducing antioxidant power (FRAP). Thus, our results propose the role of pulsed LED light in improving the photosynthetic efficiency and antioxidative properties of lettuce plants cultivated indoors. In the future, pulsed lighting techniques should be included in the development of artificial lighting systems in controlled environment agriculture (CEA) to produce high-quality crops with the possibility to save electricity.

ACS Style

Jurga Miliauskienė; Robert Karlicek; Elsebeth Kolmos. Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.). Plants 2021, 10, 762 .

AMA Style

Jurga Miliauskienė, Robert Karlicek, Elsebeth Kolmos. Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.). Plants. 2021; 10 (4):762.

Chicago/Turabian Style

Jurga Miliauskienė; Robert Karlicek; Elsebeth Kolmos. 2021. "Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.)." Plants 10, no. 4: 762.

Journal article
Published: 17 November 2020 in Agronomy
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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.

ACS Style

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 Style

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 (11):1802.

Chicago/Turabian Style

Akvilė 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.

Journal article
Published: 27 May 2020 in Agronomy
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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.

ACS Style

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 Style

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 (6):761.

Chicago/Turabian Style

Giedrė 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.