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.
2011
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Erik LysøeSammendrag
Fusarium graminearum causes head blight disease in wheat and barley. To help understand the infection process on wheat we studied global gene expression of F. graminearum in a time series from 24 to 196 hours after inoculation, compared to a non-inoculated control. The infection was rapid and after 48h over 4000 fungal genes were expressed. The number of genes expressed increased over time up to 96h (>8000 genes), and then declined at the 144h and 192h post inoculation time points. After subtraction of genes found expressed on complete medium, during carbon or nitrogen starvation, and on barley, only 355 were found exclusively expressed in wheat, mostly ones with unknown function (72.6%). These genes were mainly found in single-nucleotide polymorphism enriched islands on the chromosomes, suggesting a higher evolutionary selection pressure. The annotated genes were enriched in functional groups predicted to be involved in allantoin and allantoate transport, detoxification, nitrogen, sulfur and selenium metabolism, secondary metabolism, carbohydrate metabolism and degradation of polysaccharides and ester compounds. Several putative secreted virulence factors were also found expressed in wheat.
Forfattere
Erik LysøeSammendrag
Fusarium graminearum causes head blight disease in wheat and barley. To help understand the infection process on wheat we studied global gene expression of F. graminearum in a time series from 24 to 196 hours after inoculation, compared to a non-inoculated control. The infection was rapid and after 48h over 4000 fungal genes were expressed. The number of genes expressed increased over time up to 96h (>8000 genes), and then declined at the 144h and 192h post inoculation time points. After subtraction of genes found expressed on complete medium, during carbon or nitrogen starvation, and on barley, only 355 were found exclusively expressed in wheat, mostly ones with unknown function (72.6%). These genes were mainly found in single-nucleotide polymorphism enriched islands on the chromosomes, suggesting a higher evolutionary selection pressure. The annotated genes were enriched in functional groups predicted to be involved in allantoin and allantoate transport, detoxification, nitrogen, sulfur and selenium metabolism, secondary metabolism, carbohydrate metabolism and degradation of polysaccharides and ester compounds. Several putative secreted virulence factors were also found expressed in wheat.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Christer MagnussonSammendrag
Det er ikke registrert sammendrag
Sammendrag
Changed land use practice is one of the greatest threats to biodiversity (Sala et al. 2000). Abandonment and agricultural intensification are regarded as the most frequent land use changes in semi-natural habitats and there has been a dramatic decrease in area of semi-natural grasslands in Europe (Emanuelsson 2009). The aim of this project was to explore how colour infrared (CIR) aerial photographs can be used for monitoring and quantifying of encroachment and intensification in semi-natural grasslands in Norway.
Forfattere
Wendy WaalenSammendrag
Det er ikke registrert sammendrag
Forfattere
Bernt-Håvard ØyenSammendrag
Removal of up to 40-50 % of the total volume production by successive thinning from early age seems to have a positive effect on the yield of fresh wood in stands of Norway spruce. In young stands there is a decrease of yield caused by early, heavy thinning. The stands are usually stable and healthy. Low oriented and moderate thinning operations do not appear to influence the yield situation in general, although culmination is prolonged. Also in Central Norway difficult access to the forests, lack of roads, high labour costs and sometimes low initial densities moderate the present interest for thinning.
Forfattere
Trond HofsvangSammendrag
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