This page has only limited features, please log in for full access.

Unclaimed
Giedrė Samuolienė
Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kauno 30, Babtai, LT-54333 Kaunas distr., Lithuania

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 20 June 2021 in Plants
Reads 0
Downloads 0

Global demand for food is increasing each year, but the area of land suitable for farming is limited. Thus, there is a need to grow not only larger quantities of food but also higher quality food products in the same area. This study aimed to evaluate the influence of rootstock and high-density orchards on cv. Auksis fruit quality. Two rootstocks were selected for this experiment, P 22 super dwarfing and P 60 dwarfing. Apple trees cv. Auksis were planted in the year 2001 in single rows spaced 1.00 m, 0.75 m, and 0.50 m, apart with 3 m between rows. High-density planting and rootstock combination was found to have no significant effect on sugar accumulation and most of the elements in apple fruits. However, super dwarfing P 22 rootstock accumulated significantly higher (up to 45%) content of organic acids and up to 33%–44% lower DPPH free radical scavering activity compared to P 60 dwarfing rootstock. After summarizing the obtained results, apples which accumulated the most antioxidants (according to the activity of phenolic compounds, DPPH and ABTS), magnesium, and potassium were collected from cv. Auksis apple trees which was grafted on super dwarfing P 22 rootstock and planted at 3 × 0.75 m distances.

ACS Style

Kristina Laužikė; Nobertas Uselis; Giedrė Samuolienė. The Influence of Rootstock and High-Density Planting on Apple cv. Auksis Fruit Quality. Plants 2021, 10, 1253 .

AMA Style

Kristina Laužikė, Nobertas Uselis, Giedrė Samuolienė. The Influence of Rootstock and High-Density Planting on Apple cv. Auksis Fruit Quality. Plants. 2021; 10 (6):1253.

Chicago/Turabian Style

Kristina Laužikė; Nobertas Uselis; Giedrė Samuolienė. 2021. "The Influence of Rootstock and High-Density Planting on Apple cv. Auksis Fruit Quality." Plants 10, no. 6: 1253.

Journal article
Published: 04 May 2021 in Agronomy
Reads 0
Downloads 0

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: 02 March 2021 in Agronomy
Reads 0
Downloads 0

With the growing demand for quality food in the world, there is a new ambition to produce high-quality apples seeking reduced cultivation costs. The aim of this study was to evaluate the influence of agrotechnological tools on the quality of cv. Rubin apples during the harvest. The apple tree (Malus domestica Borkh.) cv. Rubin was grafted on dwarfing rootstocks P60, planted in single rows spaced 1.25 m between trees and 3.5 m between rows. Six agrotechnological tools were used—hand pruning, mechanical pruning, trunk incision, calcium-prohexadione, summer pruning and mechanical pruning one side, changing sides annually. The agrotechnical tools had no significant effect on accumulation of most sugars and elements, malic, folic and succinic acids in the fruits. Mechanical pruning resulted in significant accumulation of phenolic compounds, antioxidants, ascorbic acid, but reduced the amount of glucose compared to hand pruning. However, the trunk incision or spraying with ca-prohexadione together with mechanical pruning had no significant effect on sugar content but resulted in significantly higher amounts of phenols, antioxidants, ascorbic acid, Fe and Mn and reduced starch and citric acid.

ACS Style

Kristina Laužikė; Nobertas Uselis; Giedrė Samuolienė. The Influence of Agrotechnological Tools on cv. Rubin Apples Quality. Agronomy 2021, 11, 463 .

AMA Style

Kristina Laužikė, Nobertas Uselis, Giedrė Samuolienė. The Influence of Agrotechnological Tools on cv. Rubin Apples Quality. Agronomy. 2021; 11 (3):463.

Chicago/Turabian Style

Kristina Laužikė; Nobertas Uselis; Giedrė Samuolienė. 2021. "The Influence of Agrotechnological Tools on cv. Rubin Apples Quality." Agronomy 11, no. 3: 463.

Original research article
Published: 12 February 2021 in Frontiers in Plant Science
Reads 0
Downloads 0

This study aimed to evaluate the effect of dynamic red and blue light parameters on the physiological responses and key metabolites in lettuce and also the subsequent impact of varying light spectra on nutritive value. We explored the metabolic changes in carotenes, xanthophylls, soluble sugars, organic acids, and antioxidants; the response of photosynthetic indices [photosynthetic (Pr) and transpiration (Tr) rates]; and the intracellular to ambient CO2 concentration ratios (C i /C a ) in lettuce (Lactuca sativa L. “Lobjoits Green Cos”). They were cultivated under constant (con) or parabolic (dyn) blue (B, 452 nm) and/or red (R, 662 nm) light-emitting diode (LED) photosynthetic photon flux densities (PPFDs) at 12, 16, and 20 h photoperiods, maintaining consistent daily light integrals (DLIs) for each light component in all treatments, at 2.3 and 9.2 mol m–2 per day for blue and red light, respectively. The obtained results and principal component analysis (PCA) confirmed a significant impact of the light spectrum, photoperiod, and parabolic profiles of PPFD on the physiological response of lettuce. The 16 h photoperiod resulted in significantly higher content of xanthophylls (neoxanthin, violaxanthin, lutein, and zeaxanthin) in lettuce leaves under both constant and parabolic blue light treatments (BconRdyn 16 h and BdynRdyn 16 h, respectively). Lower PPFD levels under a 20 h photoperiod (BdynRdyn 20 h) as well as higher PPFD levels under a 12 h photoperiod (BdynRdyn 12 h) had a pronounced impact on leaf gas exchange indices (Pr, Tr, C i /C a ), xanthophylls, soluble sugar contents, and antioxidant properties of lettuce leaves. The parabolic PPFD lighting profile over a 16 h photoperiod (BdynRdyn 16 h) led to a significant decrease in C i /C a , which resulted in decreased Pr and Tr, compared with constant blue or red light treatments with the same photoperiod (BconRdyn and BdynRcon 16 h). Additionally, constant blue lighting produced higher α + β-carotene and anthocyanin (ARI) content and increased carotenoid to chlorophyll ratio (CRI) but decreased biomass accumulation and antioxidant activity.

ACS Style

Giedrė Samuolienė; Akvilė Viršilė; Jurga Miliauskienė; Perttu J. Haimi; Kristina Laužikė; Aušra Brazaitytė; Pavelas Duchovskis. The Physiological Response of Lettuce to Red and Blue Light Dynamics Over Different Photoperiods. Frontiers in Plant Science 2021, 11, 1 .

AMA Style

Giedrė Samuolienė, Akvilė Viršilė, Jurga Miliauskienė, Perttu J. Haimi, Kristina Laužikė, Aušra Brazaitytė, Pavelas Duchovskis. The Physiological Response of Lettuce to Red and Blue Light Dynamics Over Different Photoperiods. Frontiers in Plant Science. 2021; 11 ():1.

Chicago/Turabian Style

Giedrė Samuolienė; Akvilė Viršilė; Jurga Miliauskienė; Perttu J. Haimi; Kristina Laužikė; Aušra Brazaitytė; Pavelas Duchovskis. 2021. "The Physiological Response of Lettuce to Red and Blue Light Dynamics Over Different Photoperiods." Frontiers in Plant Science 11, no. : 1.

Journal article
Published: 04 December 2020 in Agronomy
Reads 0
Downloads 0

One of the most important factors affecting photosynthesis and metabolism is light absorbance by leaves and penetration through the canopy. The aim of this study was to evaluate the influence of planting density and tree development stages on photosynthetic activity, photosynthetic pigments, and carbohydrates in apple (Malus domestica Borkh.) trees in a combined way. The apple tree, Auksis, was grafted on dwarfing rootstock P 22. Space between rows was 3 m, trees were planted in 2001 in four distances: 0.25 m, 0.50 m, 0.75 m, and 1.00 m. Measurements and leaf samples were taken in the end of May (leaves fully expanded BBCH 20–25), in the middle of July (beginning of apple maturity BBCH 73–75) and at the end of August (harvest time BBCH 87–88) according BBCH—growth stages. Photosynthetic rate was significantly the lowest in the spring and tended to rise until fruit ripening, when it increased up to 19.4% compared to spring. Significantly the highest chlorophyll b and carotene α and β contents were found at the BBCH 73–75. The lowest levels of fructose and sorbitol in leaves were found at BBCH 73–75. The amount of starch accumulated in the leaves increased three times in summer compared to spring. Reduced distance between trees to four times (from 1 m to 0.25 m) showed clear competitive stress, as the decrease of photosynthetic rate (up to 36.4–38.6%) and total starch (up to 37–53%) was observed. The photosynthetic behaviour of apple trees was significantly affected by the development stage during the particular season which is related with physiological changes of metabolites transport and their distribution during fruit ripening and leaf senescence.

ACS Style

Kristina Laužikė; Nobertas Uselis; Darius Kviklys; Giedrė Samuolienė. Orchard Planting Density and Tree Development Stage Affects Physiological Processes of Apple (Malus domestica Borkh.) Tree. Agronomy 2020, 10, 1912 .

AMA Style

Kristina Laužikė, Nobertas Uselis, Darius Kviklys, Giedrė Samuolienė. Orchard Planting Density and Tree Development Stage Affects Physiological Processes of Apple (Malus domestica Borkh.) Tree. Agronomy. 2020; 10 (12):1912.

Chicago/Turabian Style

Kristina Laužikė; Nobertas Uselis; Darius Kviklys; Giedrė Samuolienė. 2020. "Orchard Planting Density and Tree Development Stage Affects Physiological Processes of Apple (Malus domestica Borkh.) Tree." Agronomy 10, no. 12: 1912.

Journal article
Published: 17 November 2020 in Agronomy
Reads 0
Downloads 0

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
Reads 0
Downloads 0

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.