Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2021
Authors
Darius KviklysAbstract
Winter hardiness is the main factor limiting pear growing and the use of quince rootstocks under northeastern European climate conditions. Therefore, several cultivar and rootstock trials were performed from 1997 until 2015 at the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry. Investigations of pear cultivars were conducted in 2005-2015. Twelve cultivars on QS1 rootstock were tested with the goal of finding an optimal replacement for cultivar ‘Conference’, which is not sufficiently winter hardy in the Baltic countries. The cultivar ‘Mramornaja’ showed desirable characteristics based on winter hardiness, productivity and fruit quality. Rootstock breeding was based on a winter hardy Cydonia × oblonga population and resulted in 3 registered rootstocks of K series in Lithuania. K series rootstocks were compared with QMA, QMC, Sydo, QS1, and Pyrus × communis. According to tree growth control and productivity only K11 was equal to QMA and the same as QS1. Other rootstock testing included Cydonia and Pyrus clonal and seedling rootstocks. ‘Pyrodwarf’ and OH×F333 rootstocks were too vigorous. QMC, Sydo and BA29 exhibited poor winter hardiness. The search for both pear cultivars and rootstocks adapted to northeastern European climatic conditions must be continued.
Authors
Darius KviklysAbstract
No abstract has been registered
Authors
Lina Raudone Mindaugas Liaudanskas Gabriele Vilkickyte Darius Kviklys Vaidotas Žvikas Jonas Viškelis Pranas ViškelisAbstract
Lonicera caerulea L. is an early fruit-bearing plant that originates from harsh environments. Raw materials contain a body of different phenolic origin compounds that determine the multidirectional antioxidant and pharmacological activities. The aim of this study was to comprehensively evaluate the phenolic composition, antioxidant capacities, vegetative, pomological, and sensory properties and their interrelations of selected L. caerulea cultivars, namely ‘Amphora’, ‘Wojtek’, ‘Iga’, ’Leningradskij Velikan’, ‘Nimfa’, ‘Indigo Gem’, ‘Tundra’, ‘Tola’, and fruit powders. Combined chromatographic systems were applied for the qualitative and quantitative profiling of 23 constituents belonging to the classes of anthocyanins, flavonols, flavones, proanthocyanidins, and phenolic acids. The determined markers of phytochemical profiles were cyanidin-3-glucoside, rutin, chlorogenic, and 3,5-dicaffeoylquinic acid. Anthocyanins and the predominant compound, cyanidin-3-glucoside, were the determinants of antioxidant activity. Cultivars ‘Amphora’, ‘Indigo Gem’, and ‘Tundra’ contained the greatest total amounts of identified phenolic compounds. Phenotypic characterization revealed the superiority of cultivars ‘Wojtek’ and ’Tundra’ compared to other cultivars, although ’Wojtek’ had low phenolic content and antioxidant activity and ’Tundra’ got lower sensory evaluation scores. Coupling the results of phenotypic and phytochemical characterization, cultivar ‘Tundra’ could be suitable for commercial plantations.
Authors
Darius KviklysAbstract
No abstract has been registered
Authors
Aurita Butkeviciute Mindaugas Liaudanskas Darius Kviklys Dalia Gelvonauskiene Valdimaras JanulisAbstract
The interest in old cultivars of apple trees, their fruit and processed products is growing worldwide. Studies on the qualitative and quantitative composition of biological compounds are important for the evaluation of the quality and nutritional properties of apple fruit. A variation in the qualitative and quantitative composition of triterpenic compounds was found in the fruit of apple cultivars included in the collection of National Plant Genetic Resources. A high-performance liquid chromatography (HPLC) analysis showed that the fruit of the cultivar ‘Birutės pepinas’ had the highest total amount (5.17 ± 0.86 mg g-1) of triterpenic compounds. Higher total amounts of triterpenic compounds were also found in the fruit of apple cultivars ‘Tabokinė’ and ‘Panemunės baltasis’ (3.72 ± 0.57 and 4.25 ± 0.17 mg g-1, respectively). By the quantitative composition, triterpenic compounds in apple fruit were ranked in the following order: ursolic acid > oleanolic acid > corosolic acid > betulinic acid. The old apple cultivars ‘Birutės pepinas’, ‘Panemunės baltasis’ and ‘Tabokinė’ included in the collection of National Plant Genetic Resources have a potential for cultivation in industrial orchards and for the use of their apples, and processed apple products as natural functional foods rich in triterpenic compounds and adapted for medical purposes, including the prevention of various diseases. Key words: apple, old cultivars, triterpenic compounds.
Authors
Darius KviklysAbstract
No abstract has been registered
Authors
Ingunn ØvsthusAbstract
No abstract has been registered
Authors
Ingunn ØvsthusAbstract
No abstract has been registered
Authors
Ingunn ØvsthusAbstract
No abstract has been registered
Authors
Artur Kowalski Giovanni Agati Maria Grzegorzewska Ryszard Kosson Barbara Kusnierewicz Tomasz Chmiel Agnieszka Bartoszek Lorenza Tuccio Daniele Grifoni Ingunn M. Vågen Stanislaw KaniszewskiAbstract
The biosynthesis of polyphenolic compounds in cabbage waste, outer green leaves of white head cabbage (Brassica oleracea L. var. capitata subvar. alba), was stimulated by postharvest irradiation with UVB lamps or sunlight. Both treatments boosted the content of kaempferol and quercetin glycosides, especially in the basal leaf zone, as determined by the HPLC analysis of leaf extracts and by a non-destructive optical sensor. The destructive analysis of samples irradiated by the sun for 6 days at the end of October 2015 in Skierniewice (Poland) showed an increase of leaf flavonols by 82% with respect to controls. The treatment by a broadband UVB fluorescent lamp, with irradiance of 0.38 W m−2 in the 290–315 nm range (and 0.59 W m−2 in the UVA region) for 12 h per day at 17 °C along with a white light of about 20 μmol m−2 s−1, produced a flavonols increase of 58% with respect to controls. The kinetics of flavonols accumulation in response to the photochemical treatments was monitored with the FLAV non-destructive index. The initial FLAV rate under the sun was proportional to the daily radiation doses with a better correlation for the sun global irradiance (R2 = 0.973), followed by the UVA (R2 = 0.965) and UVB (R2 = 0.899) irradiance. The sunlight turned out to be more efficient than the UVB lamp in increasing the flavonols level of waste leaves, because of a significant role played by UVA and visible solar radiation in the regulation of the flavonoid accumulation in cabbage. The FLAV index increase induced on the adaxial leaf side was accompanied by a lower but still significant FLAV increase on the unirradiated abaxial side, likely due to a systemic signaling by mean of the long-distance movement of macromolecules. Our present investigation provides useful data for the optimization of postharvest photochemical protocols of cabbage waste valorization. It can represent a novel and alternative tool of vegetable waste management for the recovery of beneficial phytochemicals.