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.
2016
Authors
Jorunn Skjermo Silje Forbord Aleksander Handå Kristine Steinhovden Vera Kristinova Rasa Slizyte Sophie Fische Michael Roleda Rosa Jonsdottir Ronan PierreAbstract
No abstract has been registered
Authors
Jorunn Skjermo Silje Forbord Aleksander Handå Kristine Steinhovden Vera Kristinova Rasa Slizyte Sophie Fische Michael Roleda Rosa Jonsdottir Ronan PierreAbstract
No abstract has been registered
Abstract
Copper in low natural concentrations is essential for cell metabolism but in excess it becomes extremely toxic to aquatic life, including to the early life stages of marine macroalgae. This work determined the effects of copper exposure on meiospore development of two kelp species, the native Macrocystis pyrifera and invasive Undaria pinnatifida. After settlement, meiospores were exposed to nominal copper concentrations of control (no added copper), 100, 200, 300 and 400 μg L−1 Cu for 9 days. Inductively coupled plasma mass spectrometry of total dissolved copper (CuT) concentrations in the blanks showed that nominal copper concentrations were reduced to 54, 91, 131 and 171 μg L−1 CuT, respectively, indicating that > 50% of the dissolved copper was adsorbed onto the culture vessel walls. In the media with meiospores, the dissolved copper concentrations decreased to 39, 86, 97 and 148 μg L−1 CuT in M. pyrifera and to 39, 65, 97 and 146 μg L−1 CuT in U. pinnatifida, indicating that 6–15% of the dissolved copper was adsorbed by the cells. For both species, meiospores germinated in all copper treatments, with germination decreasing with increasing copper concentration. However, gametophyte growth and sexual differentiation were arrested under all copper treatments. The effective copper concentration causing 50% of arrested germination (Cu-EC50) was 157 and 231 μg L−1 CuT for M. pyrifera and U. pinnatifida, respectively. The higher Cu-EC50 for U. pinnatifida suggests ecological success for the invasive species in copper-polluted environments; however, the subsequent inhibition of gametogenesis under all copper treatments indicated no difference in copper tolerance between both kelp early life stages. We compare our results with the literature available on the effects of copper on the development of early life stages of brown seaweed (Laminariales and Fucales) and discuss the importance of reporting actual experimental dissolved copper concentrations and the necessity of standardizing the response variables measured in macroalgal copper ecotoxicology.
Abstract
It is widely accepted that legume crops yield and basic chemical composition of pulses regarding crude proteins content are closely dependent on agro-environmental conditions and cropping system. Monoculture is used mostly in conventional agriculture, where the same crop is cultivated on the same land for a 12-month period. In an organic and integrated growing approach more attention is paid to plant-environment interactions, and as a result, diverse growing systems applying intercropping, catch crops, green manure, alternatives are being implemented. Thus, trials aimed at increasing the current knowledge on sustainable agriculture constitute an essential part of EUROLEGUME, which envisages the comparison of organic vs conventional cropping systems for faba bean and pea production in northern Europe. Thus, field experiments were set up in two different locations (AREI - Latvia and NIBIO -Norway). Results obtained showed significant differences in yield between tested genotypes of faba bean and pea. For pea most yielding cultivars (‘Klara’ and ‘Kirke’) slightly differed between trial locations, being the most promising in both locations. On the other hand, on faba bean accessions ‘Julia’ and ‘Lielplatones’ exhibited the highest yield in Norway, and ‘Bauska’ and ‘Lielpaltones’ in Latvia. Apart from the evaluation of the impact of crop rotation on legumes yield, the influence of legumes as intercrop with horticultural crops was also evaluated on a two years’ study, on vegetables and strawberry crops in Latvia. This work showed that the most efficient intercropping variants were cabbage/faba bean and carrot/faba bean, whilst onion and faba bean intercrop are not recommended.
Authors
Inara Helena Konosoka Arta Kronberga Aina Kokare Liga Lepse Margit Olle Maria da Graca Pereira Ingunn M. Vågen Fredrik Fogelberg Miguel RodriguesAbstract
Quality aspects of food crops have been gaining increased attention at important regarding economic and health levels. Grain legumes have high potential for the nutritional improvement of foods, although to date, existing gaps of information on the compositional characteristics of legumes as feedstuffs and foodstuffs, as well as concerning technologies enabling the development of new food and feed products entail a reduced consumption. Recognizing this challenge, EUROLEGUME has addressed this topic by selecting the best legume varieties regarding their content in protein, amino acids, dry matter, ash, and total fats in a panel of underexplored varieties of faba bean (n = 10), pea (n = 16), and cowpea (n = 28). The results obtained on the proximate composition have identified nutritionally enhanced and genetically diverse germplasms. In this work it was identified the most promising genotypes of faba bean (‘Gloria’, ‘Džūkstes’, ‘Kučānes’, and ‘Aqua Dolce’), pea (‘Looming’, ‘k4171’, ‘k4831’,‘Eesti kollane söödahernes’, and ‘Bruno’), and cowpea (‘Vg50’, ‘Vg51’, ‘Vg56’, ‘Vg57’, ‘Vg58’, and ‘Vg59’) for the development of new attractive, convenient ready-to-eat, and tasty legume-based food formulations that will contribute to the diversification of healthier diets. In addition, in this work, significant differences were stated regarding the content in protein, total, essential, and non-essential amino acids between legumes grown in organic and conventional systems that allowed to highlight the relevance of the cropping system for the nutritional value of legumes.
Authors
Gudni Thorvaldsson Liv Østrem Linda Öhlund Toroddur Sveinsson Sigridur Dalmannsdottir Rolvur Djurhuus Kenneth Høegh Thordis Anna KristjansdottirAbstract
Eight experiments with cultivars (cvs.) of grass and clover species were established in the Faroe Islands, Greenland, Iceland, Norway and Sweden to evaluate important forage species and cvs. in terms of yield potential, persistence and adaptation to variable climate in the West Nordic countries. Timothy had on average the highest spring cover after three years of trial together with smooth meadow grass (cv. Knut), whereas perennial ryegrass had the lowest spring cover after three years. On average cocksfoot (cv. Laban) and timothy (Grindstad related cvs.) gave the highest yield, 8.85 and 8.71 t ha-1, respectively, and smooth meadow grass and common bent grass the lower yields, 7.52 and 7.30 t ha-1, respectively. The results from these experiments show that we have a wide range of species and cultivars usable in the West Nordic areas. We can meet an increase in temperature to a certain level by moving the more southern species and cvs. farther north, however, our most winter hardy cvs. are still important to maintain.
Abstract
No abstract has been registered
Authors
Randi Berland FrøsethAbstract
No abstract has been registered
Abstract
No abstract has been registered
Abstract
No abstract has been registered