Giedre Samuoliene

Giedre Samuoliene
Lithuanian Research Centre for Agriculture and Forestry · Laboratory of Plant Physiology

PhD

About

217
Publications
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Publications

Publications (217)
Article
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Light intensity and spectral composition are the main parameters that may be modulated to further affect plant nutritional value and shelf life. The current study aimed to assess how variations in spectral composition and light intensity affect sugar accumulation during the storage of two popular microgreens cultivated in a greenhouse under control...
Article
Full-text available
Leafy vegetables, mainly lettuces, are currently the main crop cultivated in controlled environment agriculture (CEA), including vertical farming and plant factories. There is a rising demand to expand this portfolio with a wider variety of underutilized edible plants containing various bioactive compounds and sensory properties seeking to enrich h...
Article
Full-text available
The prevalence of apples as the most widely consumed fruit globally does not exempt them from storage-related issues, resulting in substantial harvest losses. A prominent concern is the development of rot due to various factors during storage. This research endeavors to examine the influence of agrotechnological methods on the longevity of apples a...
Article
Full-text available
Microgreens are vegetable greens that are harvested early while they are still immature and have just developed cotyledons. One of the disadvantages and a challenge in production is that they exhibit a short shelf life and may be damaged easily. In seeking to prolong the shelf life, some pre- and postharvest interventions have been investigated. He...
Article
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Drought is an environmental stressor that significantly impacts plant growth and development. Comprehending the complexity of drought stress and water utilization in the context of plant growth and development holds significant importance for sustainable agriculture. The aim of this study was to evaluate the effect of exogenously applied phytohormo...
Article
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Plant hormones regulate adaptive responses to various biotic and abiotic stress factors. Applied exogenously, they trigger the natural plant defense mechanisms, a feature that could be implemented in strategies for supporting crop resilience. The potential of the exogenous cytokinin-like acting compound (kinetin), the auxin analogue 1-naphtyl aceti...
Article
Full-text available
Horticultural plant material offers several advantages for isolating exosomes and other natural plant-derived exosome-like nanoparticles (PDENs) due to the accessibility and affordability of plant material for widespread applications. This study aims to explore the impacts of the tomato genotype (‘Admiro’, ‘Roma’, ‘Brooklyn’, ‘Marmande’ and ‘Betalu...
Preprint
Full-text available
Plant hormones regulate the adaptive responses to various biotic and abiotic stress factors. Applied exogenously they trigger the natural plant defense mechanisms, a feature that could be implemented in strategies for supporting crop resilience. The potential of exogenous cytokinin-like acting compound (kinetin), the auxin analogue 1-naphtyl acetic...
Article
Full-text available
Controlled environment agricultural (CEA) systems create technological opportunities for the higher nutritional value of vegetables and herbs. It was hypothesized that UV-A light, supplementing basal light emitting diode (LED) illumination in CEA, would enhance growth and nutritional value (nutraceutical compounds and mineral element contents) in p...
Article
Full-text available
This study aims to evaluate the impacts of the lighting photosynthetic photon flux density (PPFD) on the growth, photosynthesis, and antioxidant response of common purslane (Portulaca oleracea) cultivars to determine energy-efficient lighting strategies for CEA. Green and golden purslane cultivars were cultivated in CEA chambers and four experiment...
Conference Paper
Full-text available
Nowadays, challenges in plant protection demand new solutions. It's known that specific light-emitting diodes (LED) are suitable for targeted plant protection and could resolve pathogen resistance problems. The aim is to evaluate the effects of pulsed LED-light wavelengths on Botrytis cinerea inhibition. Research carried out under controlled enviro...
Article
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Aims To study the effect of an aqueous suspension of MoO3 NPs on drought-affected peas by watering and spraying and to evaluate their effect on the amount of Mo in different parts of the plant and in the soil. Methods The experiments were conducted in a greenhouse under a natural daylight photoperiod. Pea plants were treated with 12.5, 25, and 50...
Article
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The precise management of the nutrient solution pH is substantial for optimizing the growth and yield of hydroponically cultivated crops. Nutrient solution pH affects the solubility and availability of essential nutrients; however, during hydroponic cultivation, the pH of nutrient solution fluctuates due to unbalanced ion absorption by plants. Nutr...
Article
Full-text available
Constantly changing environments often negatively affect yield potential. Phytohormone-based biostimulants are known for their ability to control plant development and reduce the influences of negative environmental impacts and facilitate more efficient usage of resources. The aim of this study was to evaluate the effect of phytohormone-based biost...
Article
Full-text available
This study aims to expand the artificial lighting potential of controlled environment cultivations systems by introducing UV-A (~315–400 nm) wavelengths into the traditional, visible spectrum lighting, seeking to improve the nutritional and sensory value of cultivated leafy vegetables. The experiment was conducted in a closed climate-controlled cha...
Article
Full-text available
Essential oils and extracts are investigated in sustainable plant protection area lately. Alternative antifungal substances are especially relevant for major economic-relevance pathogens, like Botrytis cinerea (causal agent of strawberry grey mold), control. However, the reaction of plants to alternative protection with plant-origin products is cur...
Article
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Medicinal and agricultural plants contain numerous phytochemical compounds with pronounced biological effects on human health. They are known to encapsulate most of their characteristic bioactive compounds within membranous elements of intercellular communication known as exosomes. These nanovesicles serve as capsules protecting their biological ac...
Article
Full-text available
This study evaluates the effect of end-of-day blue (EOD B) light on the physiological response of lettuce (Lactuca sativa, Lobjoits Green Cos) at different phenological development stages. Plants were grown in a controlled environment growth chamber (day/night temperature 21 ± 2 °C; relative air humidity 60 ± 5%) under the light of light-emitting d...
Article
Full-text available
In the study, we cultivated basil, beet, and mustard microgreens under different lighting treatments from light-emitting diodes (LEDs) and evaluated the contents of mineral nutrients. Microgreens grew under blue 447, red 638 and 665, far-red 731 nm LEDs, or the same spectrum but with partial substitution of 638 nm red with green 520 (BRG), yellow 5...
Article
Full-text available
Light and nutrients are among the most important factors for sustained plant production in agriculture. As one of the goals of the European Green Deal strategy is to reduce energy consumption, greenhouse growers focus on high-value crop cultivation with less-energy-demanding growing systems. This study aimed to evaluate the effect of fertilization...
Article
Full-text available
The study aimed to determine the changes in phenolic compounds content in lettuce (Lactuca sativa L. cv. Little Gem) depending on the preharvest short-term daytime or nighttime supplemental light-emitting diodes (LEDs) to high-pressure sodium lamps (HPS) lighting in a greenhouse during autumn and spring cultivation. Plants were grown in a greenhous...
Article
Full-text available
In this study, we used apple tree (Malus domestica Borkh.) cv. Rubin grafts on dwarfing P60 root-stock. Our planting scheme was single rows with 1.25 m between trees and 3.5 m between rows. The aim of this study was to determine the impact of canopy training treatments, as a stress factor, on metabolic response to obtain key information on how to i...
Article
Photoperiod controls many physiological processes in plants, and the manipulation of day length can achieve the desired growth and development characteristics. The photoperiodic response depends on light signal perceived by plants’ photoreceptors and can vary under controlled environment conditions where the artificial light sources are used. Many...
Article
In this study, broccoli microgreens ‘Green’ were grown indoors (T 21/17°C; RH 55%) for ten days under red 660 nm and blue 447 nm light-emitting diodes (LEDs) at 9:1 and 1:3 ratios (PPFD 200 µmol m‑2 s‑1) and in nutrient solution containing 2, 5, and 15 ppm of Fe. The highest content of Fe was found in broccoli treated with 1:3×15 ppm. Interestingly...
Article
Full-text available
Modern apple orchard systems should guarantee homogeneity of fruit internal and external qualities and fruit maturity parameters. However, when orchards reach productive age, a variation of these parameters takes place and mostly it is related to uneven light distribution within the tree canopy. The aim of the study was to evaluate the canopy posit...
Article
Full-text available
Abiotic stress caused by drought impairs plant growth and reduces yields. This study aimed to investigate the impact of silica nanoparticles (SiO2 NPs) through the adverse effects of drought on the growth, oxidative stress, and antioxidative response of pea ‘Respect’. Pea plants were grown in a greenhouse before being watered (100 ± 1 mL per pot) o...
Article
Full-text available
Botrytis cinerea is a ubiquitous necrotrophic pathogen causing grey mould in economically important crops. Light effect in horticulture is undeniable and fungi also react to light. Selected specific light-emitting diodes (LEDs) and photoperiods can be used for fungal pathogen inhibition. This study aimed to evaluate how LED light wavelengths and ph...
Article
Full-text available
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 w...
Article
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Effects of the pre-treatment of maize seeds with synthetic (Thidiazuron (TDZ), Cytodef, Kinetin, Epin-extra) and natural (Ribav-extra) plant growth regulators (PGRs) on maize (Zea mays L. cultivar Tzaritza) seedlings exposed to lead (Pb 2+) were investigated in this research. The influence of PGRs on Pb 2+ allocation in maize root tissues, the seed...
Article
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Selenium (Se) is an essential microelement for human health and has antioxidant and anticancerous properties. One of the ways to increase its concentration in plants is biofortification through various agronomic practices including artificial lighting. The aim of this study was to determine the responses of baby leaf lettuce to various Se content i...
Article
Full-text available
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...
Article
Full-text available
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 dwarfi...
Article
Full-text available
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 phot...
Article
Full-text available
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...
Article
The emerging risk of pathogens resistance to chemical pesticides demands advanced solutions for plant protection. Light influence plants and pathogen interactions and affect variable biological plant mechanisms which influence plant resistance to the diseases. Therefore, the specific light-emitting diodes (LED) spectrum could be used for disease su...
Article
Limited studies showed the positive effect of UV-A radiation on increasing contents of health-beneficial compounds in various leafy vegetables. We hypothesised that UV-A could promote the uptake of mineral nutrients and affect nitrate assimilation as well. Therefore, the study aimed to evaluate how the UV-A radiation changes the contents of these s...
Article
Full-text available
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 da...
Article
The objective of our studies was to determine changes of growth and quality of red pak choi microgreens depending on different irradiance level of LED and HPS lighting under indoor and greenhouse conditions. Microgreens of red pak choi (Brassica rapa var. chinensis 'Rubi F1') were grown in a peat substrate (pH 5-6) in 0.5 L plastic vessels for 10 d...
Article
Full-text available
The aim was to find out the impact of stress, caused by agrotechnological tools on photosynthetic behaviour of apple trees. The apple tree (Malus domestica Borkh.) cultivar Rubin was grafted on dwarfing rootstocks P60, planted in single rows spaced 1.25 m apart with 3.5 m between rows. In contrast to plant senescing reflectance index and nitrogen b...
Article
Full-text available
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...
Article
The objective of our studies was to determine changes of mineral elements and nitrates content in Brassica microgreens depending on different percent of blue light in light-emitting diodes (LED) lighting. Experiments were performed in controlled environment growth chambers. Microgreens of mustard (Brassica juncea L. ‘Red Lion’), red pak choi (Brass...
Article
In this study the effects of monochromatic pulsed light-emitting diode (LED) lighting on accumulation of mineral elements in mustard (Brassica juncea L., 'Red Lion') microgreens were evaluated. Plants were grown indoors under the main high-pressure sodium (HPS) lighting supplemented with 20±2 μmol m‑2 s‑1 photosynthetic photon flux density (PPFD) o...
Article
n this study, the nutritional value of Brassica leafy greens in different growth stages was investigated. Mustard (Brassica juncea L., 'Red Lion') and tatsoi (Brassica rapa var. rosularis) were grown indoors under light-emitting diodes (blue 447 nm, red 638 nm, red 665 nm, far-red 731 nm LEDs) lighting (total PFD 300±10 µmol m‑2 s‑1; 16 h day‑1). T...
Article
Full-text available
To increase the nutritional value and levels of essential minerals in vegetable food, microgreens are promising targets. The metabolic processes of microgreens can be managed with different cultivation techniques, which include manipulating the properties of light derived by light-emitting diodes (LEDs). In this study Brassicaceae microgreens (kohl...
Article
The objective of the study was to investigate the effects of growth-stage specific lighting for the physiological homeostasis of red leaf lettuce (Lactuca sativa L. cv. Red Cos), by measuring the productivity of photosynthesis and primary metabolism. In the experiments, the main photosynthetic photon flux consisted of red (R) and blue (B) light, su...
Article
Full-text available
Ultraviolet A (UV-A) light-emitting diodes (LEDs) could serve as an effective tool for improving the content of health-promoting bioactive compounds in plants in controlled-environment agriculture (CEA) systems. The goal of this study was to investigate the effects of UV-A LEDs at different wavelengths (366, 390, and 402 nm) and durations (10 and 1...
Article
The aim of this study was to analyse the impact of light penetration into canopy and the effect of distances between technological tools and seasonality on photosynthetic behaviour. Apple tree cultivar ‘Auksis’ was grafted onto superdwarfing rootstock P22 and planted at different distances (from 0,25 m to 1 m in rows, while space between rows was 3...
Article
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...
Article
Full-text available
BACKGROUND 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 a...
Article
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 i...
Chapter
The effects of UVA and UVB light on leafy vegetables, herbs, and fruiting greenhouse crops are explored as well as UV perception and response mechanisms are reviewed. The emerging possibilities to apply specific wavelengths of UV LEDs for plant lighting enabled for targeted research and applications. Properly balanced UV LED parameters (wavelength,...
Article
Investigation of the effect of rootstock on apple bearing stability was performed at the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry in 2014-2016. Apple cultivars ‘Auksis’ and ‘Ligol’ on M.26 semi-dwarf rootstock; M.9, B.396 and P 67 dwarf rootstocks; and P 22 super-dwarf rootstock were included in the trial....
Article
The effects of pulsed light-emitting diode (LED) lighting on antioxidant and antiradical activities of basil microgreens were investigated. Basil (Ocimum basilicum L. ‘Sweet Genovese’) was grown in a controlled-environment growth chamber (21/17±2°C day/night temperature; 55±5% relative air humidity) for 14 days after sowing in peat substrate. The m...
Article
Many studies have showed that optimizing the light spectrum using light-emitting diodes (LEDs) can increase the content of bioactive compounds in various leafy vegetables, but little is still known about how manipulation of the spectrum can change the content of mineral elements. The objective of our studies was to determine changes in mineral elem...
Conference Paper
Full-text available
The study was conducted to evaluate the effects of pulsed light-emitting diodes (LEDs) lighting on mineral elements’ content in mustard microgreens. Mustard (Brassica juncea L., ‘Red Lion’) were grown indoors under high pressure sodium (HPS) lamps supplemented with monochromatic (455 nm, 470 nm, 505 nm, 590 nm and 627 nm) LEDs (total PPFD 200±10 μm...
Conference Paper
Full-text available
In this study the nutritional value of Brassicaceae leafy greens in different growth stages was investigated. Mustard (Brassica juncea L., ‘Red Lion’) and tatsoi (Brassica rapa var. rosularis) were grown indoors under light-emitting diodes (blue 447 nm, red 638 nm, red 665 nm, far red 731 nm LEDs) lighting (total PPFD 300±10 µmol m-2 s-1; 16 h day-...
Presentation
Full-text available
In this study the effects of monochromatic pulsed light-emitting diode (LED) lighting on accumulation of mineral elements in mustard (Brassica juncea L., ‘Red Lion’) microgreens were evaluated. Plants were grown indoors under the main high-pressure sodium (HPS) lighting supplemented with 20±2μmol m-2 s-1photosynthetic photon flux density (PPFD) ofm...