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
Forfattere
Svein SkøienSammendrag
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
Svein SkøienSammendrag
Det er ikke registrert sammendrag
Forfattere
Leif SundheimSammendrag
Risk assessment of two introduced pseudofungi.
Forfattere
Svein SkøienSammendrag
Det er ikke registrert sammendrag
Forfattere
Svein SkøienSammendrag
Det er ikke registrert sammendrag
Forfattere
Alhaji JengSammendrag
An African Green Revolution cannot succeed without a secured supply of mineral fertilizers. This is particularly true of phosphorus, one of the key essential macronutrients. In most tropical soils, P is one of the main limiting plant nutrients and its deficiency is a major constraint for better crop production. This is mainly attributable to (i) the low total P content in soil, (ii) the relative unavailability of inherent soil P for plant uptake, and lastly (iii) the relative speed at which applied soluble sources of P such as inorganic P fertilizers and manures become fixed or changed to unavailable forms. It is clear that mining P minerals and spreading P fertilizers over the landscape is not sustainable in the long run. Cultural practices which can secure P sources and which conserve P should be made use of. Some of the measures necessary to adequately address the P problem can be listed as follows: nutrient cycling through the recycling of crop residues, green manures, animal manures, domestic and industrial wastes; the integration into the cropping system of Pmobilizing plant species which show the ability to improve P uptake even from less labile P forms and store P in the aboveground biomass even in excess of their needs; and biological means making use of mycorrhiza and other soil fauna to help extract fixed P from deep soils under low pH conditions.
Forfattere
Stig BorgvangSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin Lichtenfeld Mekjell MelandSammendrag
Det er ikke registrert sammendrag
Forfattere
Mekjell Meland Clive KaiserSammendrag
Det er ikke registrert sammendrag