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Investigation of apple genetic resources to select donors resistant to fungal diseases and for their winterhardiness

100%

Gelvonauskis B., Shikshnianas T., Duchovskis P., Gelvonauskiene D.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2004

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tom 497

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nr 2

Apple cultivars were investigated for fungal disease resistance and for winterhardiness. Diallel crosses of 8 apple cultivars were made according to Griffing’s method 4. Winterhardiness of apple seedlings and resistance of apple seedlings to fungal diseases were estimated by using a 0-5 scale. Significant differences for winterhardiness, resistance to scab, powdery mildew and apple blotch were found among the apple crosses in all the analyzed years (average of tree years for winterhardiness and average of six years for scab resistance). General and specific combining abilities (GCA and SCA) were highly significant for all investigated parental cultivars and traits, except SCA for resistance to powdery mildew. It showed that genetic variability existed for these traits and selection should result in genetic progress. Moreover, winterhardiness and resistance to scab, powdery mildew and apple blotch are mainly controlled by the additive gene action. Therefore a selection of parents on phenotype should be effective for breeding resistant apple cultivars.

2

Wpływ zamrażania i sposobu przetwarzania jagód porzeczki czarnej na zawartość kwasu askorbinowego i barwników

100%

Rubinskiene M., Viskelis P., Duchovskis P.

Biuletyn Naukowy. Uniwersytet Warmińsko-Mazurski w Olsztynie

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2002

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nr 16

3

Effect of transplant growth stage on tomato productivity

100%

Jankauskiene J., Brazaityte A., Bobinas C., Duchovskis P.

Acta Scientiarum Polonorum. Hortorum Cultus

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2013

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tom 12

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nr 2

Transplant quality of tomato depend on such factors as microclimate parameter, substrate, plant nutrition and other. The growth stage is very important indices of their quality. The objective of research was to determine the effect of the growth stage of tomato transplants on their quality and yield. Research was carried out in a greenhouse of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry in the period of 2008–2010. The investigated transplant growth stage of tomato cv. Cunero F1 5–6 leaves, 7–8 leaves and 9–10 leaves. Tomato transplants with 9–10 leaves were elongated and their leaves area were the highest. Plants with 7–8 leaves according to stem and leaves ratio were qualitative, accumulated in leaves the highest content of photosynthetic pigments and had the highest SLA. Tomato transplanted with older transplant started to flower the fastest compared to 5–6 leaves transplant. Higher total yield was produced by 7–8 leaves transplants. The least early yield was produced by 5–6 leaves transplant. The growth stage of tomato transplants had no effect on the average tomato fruit weight.

4

Impact of electromagnetic fields on morphogenesis and physiological indices of tomato

100%

Staselis A., Duchovskis P., Brazaityte A.

International Agrophysics

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2004

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tom 18

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nr 3

5

Changes in biologically active constituents during ripening in black currants

88%

Rubinskiene M., Viskelis P., Jasutiene I., Duchovskis P., Bobinas C.

Journal of Fruit and Ornamental Plant Research

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2006

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tom 14

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nr Suppl.2

6

Effects of pre-sowing treatment with synthetic and natural plant growth regulators on the response of maize (Zea mays L.) to lead stress

76%

Bashmakov D. I., Lukatkin A. S., Miliauskiene J., Samuoliene G., Duchovskiene L., Stepien A., Duchovskis P.

Journal of Elementology

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2021

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tom 26

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nr 2

7

Tomato biochemical composition and quality attributes in different maturity fruits

76%

Radzevicius A., Viskelis P., Viskelis J., Karkleliene R., Juskeviciene D., Duchovskis P.

Acta Scientiarum Polonorum. Hortorum Cultus

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2016

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tom 15

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nr 6

Maturity at harvest is very important attribute to tomatoes quality. This research showed that fully ripen tomato fruits had the highest amount of lycopene and β-carotene respectively 46.68 and 6.22 g kg-1. Therefore, it was determined correlation between amount of carotenoids and tomato ripening stages. Tomato fruit flesh lost it’s firmness through ripening period from 82.54 till 15.24 N cm-2. Fruit ripeness stage at harvest determines tomatoes biochemical composition and quality. Carotenoids (β-carotene, lycopene) syntheses during fruit ripening were the results of tomato colour and nutrition value changes, which results to correlation between colour indexes and tomato fruit quality attributes such as: hue angle (h°) and lycopene, colour index a* and lycopene, flesh firmness and hue angle (h°), skin firmness and chroma (C).

8

Cultivation of sweet pepper (Capsicum annuum L.) transplants under high pressure sodium lamps supplemented by light-emitting diodes of various wavelengths

64%

Bagdonaviciene A., Brazaityte A., Virsile A., Samuoliene G., Jankauskiene J., Sirtautas R., Sakalauskiene S., Miliauskiene J., Marockiene N., Duchovskis P.

Acta Scientiarum Polonorum. Hortorum Cultus

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2015

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tom 14

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nr 6

In greenhouses, artificial lighting is applied in winter and early spring as sup-plementary light source to increase photosynthesis and plant growth. The objective of this study was to evaluate the cultivation of sweet pepper transplants under LED lamps that were developed to supplement HPS lamps used in greenhouses. The experiments were carried out in the greenhouses at the Lithuanian Research Centre for Agriculture and For-estry Institute of Horticulture. Sweet peppers (Capsicum annuum) L. cultivar ‘Reda’ and the hybrid ‘Figaro’ F1 were used for investigation. Four types of solid-state lamps were used with light-emitting diodes (LEDs) with peak emissions at blue 455 nm and 470 nm, cyan 505 nm, and green 530 nm. PPFD of each type of LED lamp was 15 μmol m-2 s-1, and the PPFD of HPS lamps was 90 μmol m-2 s-1. The reference transplants were grown under the illumination of HPS lamps (110 μmol m-2 s-1). The photoperiod of artificial lighting was maintained at 18 hours. Our experiments revealed different responses to sup-plemental LED lightings between the cultivar and the hybrid. The supplemental 470 nm illumination with HPS lamps mostly resulted in increases in the following areas: leaf area, fresh and dry weight, and the photosynthetic pigment content of the sweet pepper ‘Reda’ transplants. A similar positive effect was determined using supplemental 455 and 505 nm LED lights. However, the supplemental green 530 nm LED lights had no effect on growth, and they inhibited the development of the sweet pepper ‘Reda’ transplants. The HPS light had a positive effect on the growth parameters of the ‘Figaro’ F1 transplants, but all of the supplemental LED lights suppressed their growth and development

9

Impact of CO2 on quality of baby lettuce grown under optimized light spectrum

64%

Sirtautas R., Samuoliene G., Brazaityte A., Sakalauskaite J., Sakalauskiene S., Virsile A., Jankauskiene J., Vastakaite V., Duchovskis P.

Acta Scientiarum Polonorum. Hortorum Cultus

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2014

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tom 13

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nr 2

The cost and yield are two the most important criteria in agriculture by which optimization of environmental factors are needed to carry out. In the present study, we investigated the efficient lighting spectrum and elevated CO2 concentration for cultivating healthier plants more rapidly. One of the aims of our study is to optimize LEDs light spectrum for healthier vegetable production in greenhouses and maximum economical benefits for growers. The impact of elevated carbon dioxide (CO2) concentration on antioxidant and nutritional properties of green leaf ‘Multigreen 3’ and red leaf ‘Multired 4’ baby leaf lettuce (Lactuca sativa L.), grown under optimized light spectrum was investigated. CO2 concentrations of 0.963 g · dm-3and 1.938 g · dm-3 were maintained in the growth chambers. Lettuce was grown under four wavelength (640, 455, 660 and 735 nm) light-emitting diode based (LED) illumination. Under 0.963 g · dm-3 CO2 conditions, ‘Multired 4’ lettuce represented higher antioxidant value due to higher ascorbic acid, anthocyanin, tocopherol contents and higher sucrose concentration, as compared to ‘Multigreen 3’ lettuce. Higher CO2 concentration (1.938 g · dm-3) had uneven effect on the quality of both baby leaf lettuce cultivars. Red leaf lettuce reacted to the higher CO2 level by lowered D tocopherol, ascorbic acid concentrations and significantly higher glucose contents in their leaves, when green leaf lettuce – contrarily – contained higher ascorbic acid and D tocopherol concentrations under 1.938 g · dm-3 of CO2.

10

The effect of elevated CO2 concentrations on leaf carbohydrate, chlorophyll contents and photosynthesis in radish

64%

Urbonaviciute A., Samuoliene G., Sakalauskaite J., Duchovskis P., Brazaityte A., Siksnianiene J. B., Ulinskaite R., Sabajeviene G., Baranauskis K.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 6

The objective of this study was to evaluate the effect of different CO2 concentrations on carbohydrate, chlorophyll contents and net photosynthetic productivity in radish (Raphanus sativus L., cv. Zara) leaves. Plants were exposed to 350, 700, 1,500 and 3,000 ppm atmospheric CO2 concentrations over ten days. Day/ night temperature was 24°C/17°C and photoperiod was 16 h. Carbohydrate (fructose, glucose, sucrose and maltose) content analysis was performed using chromatographic methods. The content of chlorophyll was evaluated spectrophotometrically. The results showed that elevated CO2 increases total carbohydrate content and changes in hexoses/sucrose ratio. A significant increase in chlorophyll content was only in 1,500 ppm treatment. Differences in photosynthetic productivity rate were within error margins. There was no effect on carbohydrate and chlorophyll contents in radish leaves seven days after returning plants to ambient CO2, though higher photosynthetic productivity rate was in radish, previously grown under 700 ppm CO2. In summary, leaf carbohydrate contents affect the intensity of photosynthetic pigment synthesis.

11

Productivity and fruit quality of scab resistant apple cultivars and hybrids

64%

Sasnauskas A., Gelvonauskiene D., Gelvonauskis B., Viskelis P., Duchovskis P., Bobinas C., Siksnianiene J., Sabajeviene G.

Journal of Fruit and Ornamental Plant Research

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2006

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tom 14

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nr Suppl.2

12

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

52%

Brazaityte A., Virsile A., Jankauskiene J., Sakalauskiene S., Samuoliene G., Sirtautas R., Novickovas A., Dabasinskas L., Miliauskiene J., Vastakaite V., Bagdonaviciene A., Duchovskis P.

International Agrophysics

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2015

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tom 29

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nr 1

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.

13

Changes of physiological and genetic indices of Lycopersicon esculentum Mill. by cadmium under different acidicity and nutrition

52%

Duchovskis P., Brazaityte A., Juknys R., Januskaitiene I., Sliesaravicius A., Ramaskeviciene A., Burbulis N., Siksnianiene J. B., Baranauskis K., Duchovskiene L., Stanys V., Bobinas C.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 2

Changes in physiological and genetic indices of Lycopersicon esculentum Mill. due to the impact of cadmium at different substrate acidity and nutrition were studied under controlled conditions in phytotron. The amount of photosynthetic pigments, stem diameter, sap flow rate, the mitotic index of cells and inhibition of cell mitosis were investigated. Cadmium in acidic environment produced a very toxic effect on growth, the synthesis of chlorophylls and carotenoids and stem diameter, sap flow rate of L. esculentum. Cadmium suppressed the mitotic index of cells and disorganized normal mitosis. The mitosis with anomalies (chromosome breaks, fragmentation, bridges, chromosome eliminations and abnormal nucleus divisions) was observed in meristem cells of roots of L. esculentum. It was concluded that nutrient deficiency led to evident plant growth retardation, and higher nutrient favoured plant growth under the effect of cadmium.

Ograniczanie wyników

Investigation of apple genetic resources to select donors resistant to fungal diseases and for their winterhardiness

Wpływ zamrażania i sposobu przetwarzania jagód porzeczki czarnej na zawartość kwasu askorbinowego i barwników

Effect of transplant growth stage on tomato productivity

Impact of electromagnetic fields on morphogenesis and physiological indices of tomato

Changes in biologically active constituents during ripening in black currants

Effects of pre-sowing treatment with synthetic and natural plant growth regulators on the response of maize (Zea mays L.) to lead stress

Tomato biochemical composition and quality attributes in different maturity fruits

Cultivation of sweet pepper (Capsicum annuum L.) transplants under high pressure sodium lamps supplemented by light-emitting diodes of various wavelengths

Impact of CO2 on quality of baby lettuce grown under optimized light spectrum

The effect of elevated CO2 concentrations on leaf carbohydrate, chlorophyll contents and photosynthesis in radish

Productivity and fruit quality of scab resistant apple cultivars and hybrids

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

Changes of physiological and genetic indices of Lycopersicon esculentum Mill. by cadmium under different acidicity and nutrition