Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2022
Forfattere
Ólöf Dóra Bartels Jónsdóttir Davíð Gíslason Guðbjörg Ólafsdóttir Simo Maduna Snorre Hagen Patrick Reynolds Sæmundur Sveinsson Albert ImslandSammendrag
Lumpfish is now the single most important cleaner fish species to date and there is an extensive lumpfish translocation along the Norwegian coast. A reliable baseline information about the population genetic structure of lumpfish is a prerequisite for an optimal managing of the species to minimize possible genetic translocation and avoid possible hybridisation and introgression with local populations. The current study is a follow up of the study of Jónsdóttir et al. (2018) using expressed sequence tag-short tandem repeats (EST-STRs) markers. Samples (N = 291) were analysed from six sample locations along the Norwegian coastline from south to north, with additional 18 samples of first-generation (from wild fish) reared fish from a fish farm outside Tromsø (North Norway). Present findings show a lack of population differentiation among lumpfish sampling population along the Norwegian coast using EST-STRs, which is in accordance with the findings of Jónsdóttir et al. (2018) where genomic STRs (g-STRs) were analysed. Present findings indicate that should translocated lumpfish escape from salmon sea pens in Norway, this will probably have little impact on the genetic composition of the local lumpfish population.
Forfattere
Annika M. Felton Per-Ola Hedwall Adam Felton Fredrik Widemo Märtha Wallgren Emma Holmström Erik Löfmarck Jonas Malmsten Hilde Karine WamSammendrag
Det er ikke registrert sammendrag
Forfattere
Pekka E. Kauppi Gustav Stål Lina Arnesson-Ceder Isabella Hallberg Sramek Hans Fredrik Hoen Arvid Svensson Iddo K. Wernick Peter Högberg Tomas Lundmark Annika NordinSammendrag
Det er ikke registrert sammendrag
Forfattere
Tina Heger Jonathan M. Jeschke Catherine Febria Johannes Kollmann Stephen Murphy Line Rochefort Nancy Shackelford Vicky M. Temperton Eric HiggsSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Jahn Davik Dag Røen Erik Lysøe Matteo Buti Simeon Rossmann Muath K Alsheikh Erez Lieberman Aiden Olga Dudchenko Daniel James SargentSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Declan J. Lafferty Richard V. Espley Cecilia H. Deng Catrin S. Günther Blue Plunkett Janice L. Turner Laura Jaakola Katja Karppinen Andrew C. Allan Nick W. AlbertSammendrag
Members of the Vaccinium genus bear fruits rich in anthocyanins, a class of red-purple flavonoid pigments that provide human health benefits, although the localization and concentrations of anthocyanins differ between species: blueberry (V. corymbosum) has white flesh, while bilberry (V. myrtillus) has red flesh. Comparative transcriptomics between blueberry and bilberry revealed that MYBPA1.1 and MYBA1 strongly correlated with the presence of anthocyanins, but were absent or weakly expressed in blueberry flesh. MYBPA1.1 had a biphasic expression profile, correlating with both proanthocyanidin biosynthesis early during fruit development and anthocyanin biosynthesis during berry ripening. MYBPA1.1 was unable to induce anthocyanin or proanthocyanidin accumulation in Nicotiana benthamiana, but activated promoters of flavonoid biosynthesis genes. The MYBPA1.1 promoter is directly activated by MYBA1 and MYBPA2 proteins, which regulate anthocyanins and proanthocyanidins, respectively. Our findings suggest that the lack of VcMYBA1 expression in blueberry flesh results in an absence of VcMYBPA1.1 expression, which are both required for anthocyanin regulation. In contrast, VmMYBA1 is well expressed in bilberry flesh, up-regulating VmMYBPA1.1, allowing coordinated regulation of flavonoid biosynthesis genes and anthocyanin accumulation. The hierarchal model described here for Vaccinium may also occur in a wider group of plants as a means to co-regulate different branches of the flavonoid pathway.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marie-Therese Krieger Julia Ditton Harald Albrecht Luise Linderl Johannes Kollmann Leonardo H. TeixeiraSammendrag
Changes in grassland management lead to alterations in community structure and can facilitate rapid expansion of both non-native and native invaders. Light availability differs greatly depending on grassland density, and competition for light is an important component of species dynamics. In this study, we examined if light reduction is an effective method to suppress a native invader in pre-alpine meadows of low to moderate land-use intensity. Our study focused on the effects of shading and other site conditions on vegetative and generative growth of Jacobaea aquatica, a poisonous hemicryptophyte regionally spreading in C Europe. We hypothesized that negative shade effects occur in addition to suppression by high grassland productivity, moist climate and less intense management. Furthermore, we postulated that shading affects vegetative growth more than reproduction. To understand the effects of shading we conducted a greenhouse experiment with plants grown under different shading nets. These results were compared to data gathered from 20 field sites that represented a distinct gradient in grassland management and shading. Overall, performance of generative J. aquatica plants was reduced by shading in the greenhouse, while density of vegetative plants was reduced in the field. In the greenhouse, plants affected by shading had significantly fewer flower heads and slightly smaller rosettes. Under field conditions, shading effects occurred together with additional environmental factors, while density of vegetative plants was significantly reduced by shading. Our data show that while realising high shading effects in the field is hard to accomplish, light reduction still has an influence on plant performance and population density, and could therefore be used to suppress the invasive native J. aquatica. In low to moderate intensity grasslands, suppression can be achieved by delaying the first mowing, thus enhancing shading. We conclude that manipulating environmental filters to increase resource competition is recommended as an alternative management tool to control the abundance of invasive native plants in grassland.