Loziene K.,Institute of Botany of Nature Research Center |
Venskutonis R.R.,Kaunas University of Technology
Journal of Essential Oil Research | Year: 2010
Seventeen samples of the interspecific hybrid of thyme, Thymus x oblongifolius Opiz, were collected from thirteen different habitats in Lithuania. The composition of their essential oils was analyzed by capillary gas chromatography (GC) and mass spectrometry (MS). Eight chemotypes were defined, namely l-octen-3-ol, (Z)-β-ocimene, geraniol, myrcene, 1,8-cineole, α-terpinyl acetate, germacrene B and geraniol/germacreneB. The composition of the hybrid oil can be characterized as intermediate comparing to its parental species, T. serpyttum L. and T. pulegioides L., according to the percentages of thymol, carvacrol, 1,8-cineole, germacrene B, geraniol and (Z)-β-ocimene. Three samples of the investigated T x oblongifolius were moved from natural habitats into the experimental field collection and cloned annually in the ground under the same environmental conditions. Oil composition of these three samples was monitored in the fourth clonal offspring generation and compared with the oil composition of their parent plants from natural habitats. The results obtained by cloning showed that the composition of essential oil of the interspecific hybrid T. x oblongifolius is quite stable, most likely predetermined genetically. © 2010 Allured Business Media.
Cizeikiene D.,Kaunas University of Technology |
Juodeikiene G.,Kaunas University of Technology |
Paskevicius A.,Institute of Botany of Nature Research Center |
Bartkiene E.,Lithuanian University of Health Sciences
Food Control | Year: 2013
The evaluation of antimicrobial activities of Lactobacillus sakei KTU05-6, Pediococcus acidilactici KTU05-7, Pediococcus pentosaceus KTU05-8, KTU05-9 and KTU05-10 strains producing organic acids and bacteriocins like inhibitory substances (BLIS) against undesirable microorganisms in the food industry, were performed using an agar well diffusion assay method. The metabolites of lactic acid bacteria (LAB) inhibited the growth of pathogenic bacteria, belonging to Bacillus, Pseudomonas, Listeria and Escherichia genera in various degrees. The organic acids and BLIS of LAB show fungicidal and fungistatic activities against fungi and yeast such as Fusarium culmorum, Penicillium chrysogenum, Aspergillus fumigatus, Aspergillus versicolor, Penicillium expansum, Aspergillus niger, Debaryomyces hansenii and Candida parapsilosis. 20% of P. pentosaceus KTU05-9 sourdough in a bread recipe suppressed the bread ropiness in artificially contaminated bread by Bacillus subtilis spores, until 6 days storage at 23 °C. Moreover P. acidilactici KTU05-7, P. pentosaceus KTU05-8 and KTU05-10 single cell suspension sprayed on the bread surface, inhibited growing of fungi until 8 days of storage in polythene bags. The presence of BLIS and organic acids by tested LAB is an indication that these bacteria can be used widely in the food industry as bio-preservatives due to their broad inhibition spectrum. © 2012 Elsevier Ltd.
Kiene A.R.,Institute of Botany of Nature Research Center
Archives of Natural History | Year: 2013
Jean-Emmanuel Gilibert (1741-1814) was a French botanist, physician, and politician who lived in the Polish-Lithuanian Commonwealth between 1775 and 1783, where he organized studies on medicine and natural sciences. During this time, he collected local plants, and in 1781-1782, published a two-volume compendium: Flora Litvanica inchoata. One hundred copies of the first volume and an unknown number of the second volume were issued. In 1925, Polish botanist Slawinski noted five libraries holding copies of Flora Litvanica. The current census shows at least 18 European libraries holding original copies of the book. © The Society for the History of Natural History.
Karpaviciene B.,Institute of Botany of Nature Research Center
Biologia | Year: 2012
Morphological, reproductive and karyological variability were investigated in fifteen populations of Allium oleraceum transferred from natural populations in Lithuania to the field collection of medicinal and aromatic plants of the Institute of Botany of the Nature Research Centre in Vilnius. Nine populations were tetraploid (2n = 4x = 32), four pentaploid (2n = 5x = 40) and two consisted of both cytotypes. The greatest differences among the populations and between the ploidy levels were observed in stem height and mass of aerial bulbils per plant. The seed production was very low and did not differ significantly between the ploidy levels, while neither tetraploids nor pentaploids did produce any seed if insects were prevented from visiting their flowers. The means of the morphological characters were higher in pentaploids than in tetraploids. However, none of them provided the possibility of determining ploidy level without chromosome counting. © 2012 Versita Warsaw and Springer-Verlag Wien.
Ranceliene V.,Institute of Botany of Nature Research Center |
Vysniauskiene R.,Institute of Botany of Nature Research Center
Emirates Journal of Food and Agriculture | Year: 2012
Stability of cell division and genetic structures has special significance for plant development and productivity. On the basis of literature data about the very low photolyase activity in roots, the action of UV-B radiation and its putative modifying factors were studied on the root meristematic cells of model plant Crepis capillaris. It is really a very sensitive system for UV-B radiation. Action of UV-B was investigated in a wide range of doses (0; 0.75;1.00; 1.13; 1.50; 2.00; 2.50; 3.00kJ m-2. The dose of 0.75kJ m-2 already decreased the cell division and up to 1kJ m-2 UV-B dose induced the chromosome aberrations (CAs). The supplementary B chromosome did not show any effect on CA induction, but plants with B chromosome had a more stable mitotic activity of cells. The strongest protective effect on CA induction was revealed by salicylic acid (10-4M). Photoreactivation also showed certain decrease of the CA level, and the lowest effect was of ascorbic acid.
Koreivien J.,Institute of Botany of Nature Research Center |
Kasperovicien J.,Institute of Botany of Nature Research Center
Limnologica | Year: 2011
The anthropogenic eutrophication of surface waters and the global climate warming promoted some bloom-forming tropical cyanobacteria, including Anabaena, distribution northwards. Anabaena bergii var. limnetica was for the first time recorded in Lithuania from the hypertrophic Lake Gineitišks in 2008. It developed when the water temperature reached its annual maximum (July-August); its highest biomass (0.26mgL-1) was reached at the end of July. Akinetes formation started in the middle of August. The morphological variability of A. bergii var. limnetica morphospecies is presented. The morphological, ecological differences and distribution of A. bergii var. limnetica and the related morphospecies A. bergii, A. bergii f. minor, Anabaena minderi are discussed. © 2011 Elsevier GmbH.
Druteikiene R.,Lithuanian Academy of Sciences |
Luksiene B.,Lithuanian Academy of Sciences |
Peciulyte D.,Institute of Botany of Nature Research Center |
Baltrunas D.,Lithuanian Academy of Sciences
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010
The aim of this study was to investigate the change of Pu oxidation states due to interaction with aerobic bacteria and fungi at low pH under laboratory conditions. Microorganisms were isolated from samples collected from the low-level radioactive waste repository within the confines of Ignalina NPP. Abilities of the fungi (Absidia spinosa var spinosa Lendn. and Paecilomyces lilacinus Thom Samson) as well as Gram-positive bacteria (Bacillus mycoides and Micrococcus luteus) and Gram-negative bacterium I-m1 to transform the oxidation states of Pu under aerobic conditions were investigated. Oxidized and reduced Pu was tested using two radiochemical procedures. The amount of reduced and oxidized Pu was determined by measuring alpha activity after radiochemical separation. The results have shown that all bacteria and fungi can very slightly alter oxidation states of Pu due to their microbial activity. All the microorganisms tested demonstrate quite a fast process of Pu biosorption under the experimental conditions. © 2010 Akadémiai Kiadó, Budapest, Hungary.
Vasaitis R.,Swedish University of Agricultural Sciences |
Lygis V.,Institute of Botany of Nature Research Center |
Vasiliauskaite I.,Lithuanian University of Agriculture |
Vasiliauskas A.,Lithuanian Research Center for Agriculture and Forestry
European Journal of Forest Research | Year: 2012
In forest stands, Picea abies is commonly subjected to logging and bark stripping injuries. Most mechanical wounds do not exceed 300 cm 2, but their pathological consequences are unclear. The aim of the study was to estimate the rate of wound occlusion and the probability of decay in P. abies stems in relation to initial wound size and wounding season. The study included forty-five stems with 1-, 2-, 3-, 4- and 5-cm-wide by 15-cm-long wounds (15-75 cm 2), and eighty-three stems with 15-cm-wide by 20-cm-long wounds (300 cm 2), made either in January or in August. After 19-21 years, each wound was assessed for occlusion rate and the presence of decay. All 1- to 2-cm-wide wounds were occluded, compared to 58-70% of the 3- to 4-cm-wide wounds, 25% of the 5-cm-wide wounds, and 0% of the 15-cm-wide wounds. On average, it took 3.6, 5.5, 10.4, 12.7 and 14.7 years to occlude wounds ranging in size from 1- to 5-cm-wide, respectively. After 21 years, the observed size of wounds comprising an initial area of 300 cm 2 ranged between 14 and 481 cm 2. Wounding season and stem DBH had no impact on wound healing. Wound decay incidence correlated positively with the initial width of injury (r = 0.925; P < 0.05). All 1- to 2-cm-wide wounds lacked any decay, while the proportions of decay among 3-, 4-, 5- and 15-cm-wide wounds were 58.3, 50.0, 83.3 and 100%, respectively. Length of decay comprised 35-225 cm. Consequently, wounds on P. abies stems greater than 5 cm width are unlikely to be occluded and more prone to decay development. © 2011 Springer-Verlag.
Koreiviene J.,Institute of Botany of Nature Research Center |
Anne O.,Klaipeda University |
Kasperoviciene J.,Institute of Botany of Nature Research Center |
Burskyte V.,Klaipeda University
Environmental Monitoring and Assessment | Year: 2014
The occurrence and severity of harmful cyanobacterial or blue-green algal blooms (HABs) have increased in recent decades, posing a serious threat of illness to humans. In some countries, water contaminated with cyanotoxins that is used for drinking or haemodialysis has posed a particularly serious risk. However, it is now recognized that recreational exposure to natural toxins by skin contact, accidental swallowing of water or inhalation can also cause a wide range of acute or chronic illnesses. In this review, we focus on the importance of cyanotoxin management in recreational waters. The symptoms related with HAB poisonings, the recommended safety concentrations limit for cyanobacteria and cyanotoxins in such waters, as well as early health hazard indicators of their presence and their monitoring are all discussed. We also present in this review an overview of the methods developed in recent decades for eliminating cyanobacteria and the toxic compounds that they produce. © 2014 Springer International Publishing.
Karosiene J.,Institute of Botany of Nature Research Center |
Paskauskas R.,Institute of Botany of Nature Research Center |
Paskauskas R.,Klaipeda University
Estuarine, Coastal and Shelf Science | Year: 2012
The midsummer epiphyton community structure on common reed stems was investigated in different zones of the Curonian Lagoon (south-eastern Baltic). Epiphyton was characterized by dominance of diatoms and cyanobacteria. The shading effects of phytoplankton or reed belts density and phosphorus concentrations mainly contributed to differences in epiphyton amount and species taxonomic composition. Epiphyton algae and cyanobacteria abundance increased toward river run-off. The highest biomass and dominance of diatoms were observed in the zones with higher phosphorus concentrations. © 2011 Elsevier Ltd.