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.
2012
Forfattere
Line Emilie Sverdrup Christine Bjørge Ole Martin Eklo Merete Grung Torsten Källqvist Ingeborg Klingen Marit Låg Edgar Rivedal Erik Ropstad Steinar ØvrebøSammendrag
Det er ikke registrert sammendrag
Sammendrag
Statens vegvesen skal bygge ny E6 på strekninga Ringebu Sør til Otta i Gudbrandsdalen. Bioforsk fekk i samarbeid med Vegetasjonsrådgiver Tanaquil Enzensberger oppdraget med å foreslå metoder for etablering av vegetasjon langs den nye traseen. Ei viktig målsetting har vore å ta vare på mest muleg av dei biologiske verdiane som blir ramma av utbygginga.
Sammendrag
Begrenset næringstilførsel er viktig for å oppnå grøntarealer med lite behov for slått og skjøtsel. Her presenteres resultater som viser at bruk av små mengder slam og kompost ved etablering av vegetasjon på undergrunnsmasser kan gi sikker etablering av grasvegetasjon med lite behov for skjøtsel.
Forfattere
Erik J. JonerSammendrag
Det er ikke registrert sammendrag
Forfattere
Igor A. Yakovlev YeonKyeong Lee Adam Vivian-Smith Jorunn Elisabeth Olsen Carl Gunnar FossdalSammendrag
In Norway spruce there is an enigmatic epigenetic memory of the temperature conditions during embryogenesis affecting vital phenological traits (Yakovlev et al. 2012). Adaptive phenological traits such as bud burst and bud set, observed as clinal variation in nature, are the ones affected.The epigenetic memory is establishment exclusively during embryogenesis in response to environmental impact. The epitype fixated by the time the embryo is fully developed without any change in the primary DNA sequence and is mitotically propogated. The epigenetic mechanism influence the phenotype through altered regulation of gene expression and is propagated throughout every growth cycle for the entire lifespan of this long lived species.The epigenetic memory may be realized through several molecular mechanisms including DNA methylation, and histone modifications affecting chromatin, as well as by small non-coding RNAs, and may also be related to the mechanisms silencing transposable or repetitive elements in the genome. MicroRNAs (miRNAs), endogenous small regulatory RNAs, are shown to be differentially expressed in genetically identically but epigenetically different progenies, in regards to the timing of bud burst and bud set (Yakovlev et al. 2010).We have started large scale studies using next regeneration sequencing approaches to identify and characterize the genes and regulatory elements involved in the initiation, maintenance, and heritability of the epigenetic memory. Epigenetic related changes in miRNA regulation during the establishment of the epigenetic memory are now studied in in vitro derived somatic embryos developing under cold (18C) and warm (30C) environmental conditions (that induce epitypes).We have constructed and sequenced 10 small RNA libraries during proliferation, maturation stage 1, 2 3 and the mature stage of embryo formation in the contrasted temperatures, in two control libraries during proliferation at 22C, as well as their mRNA transcriptomes using the Ion Torrent PGMTM (Life technologies) platform.We are expecting to determine at what stage(s) during embryogenesis the epigenetic memory marks are being laid down by identifying when the transcriptomic differences, of small RNA and mRNAs, between the epitypes are the most prominent during embryogenesis. The identification of novel miRNA candidates and the confirmation of conserved and novel miRNAs will be presented.
Sammendrag
Fungal degradation alters the microstructure of wood and its physical and chemical properties are also changed. While these changes are well investigated as a function of mass loss, mass density loss and changes in equilibrium moisture content are not well elucidated. The physical and chemical alterations are crucial when linking microstructural characteristics with macroscopic mechanical properties. In the present article, a consistent set of physical, chemical and mechanical characteristics is presented, which were measured on the same sample before and after fungal degradation. In the first part of this two-part contribution, elucidating microstructure/stiffness-relationships of degraded wood, changes in physical and chemical data are presented, which were collected from specimens of Scots pine (Pinus sylvestris) sapwood degraded by Gloeophyllum trabeum (brown rot) and Trametes versicolor (white rot) for up to 28 weeks degradation time. A comparison of mass loss with corresponding mass density loss demonstrated that mass loss entails two effects: firstly, a decrease in sample size (more pronounced for G. trabeum), and secondly, a decrease of mass density within the sample (more pronounced for T. versicolor). These two concurrent effects are interrelated with sample size and shape. Hemicelluloses and cellulose are degraded by G. trabeum, while T. versicolor was additionally able to degrade lignin. In particular because of the breakdown of hemicelluloses and paracrystalline parts of cellulose, the equilibrium moisture content of degraded samples is lower than that in the initial state
Forfattere
Kjell Bjørgen Esser May Sæthre Neelam Pradhananga Hemant OjhaSammendrag
Det er ikke registrert sammendrag
Forfattere
Ole Tobias Rannestad May Sæthre Amon P. MaerereSammendrag
Det er ikke registrert sammendrag
Forfattere
Rose BergslidSammendrag
Det er ikke registrert sammendrag
Sammendrag
Restprodukter fra fiskeoljeindustrien som bleikejord og sape inneholder en lang rekke organiske miljogifter (POP) som brytes langsomt ned i naturen, akkumulerer i marine og terrestriske naringskjeder og er giftige. I denne rapporten gis en sammenstilling av analyser av sape, bleikejord og fiskeolje fra fiskeoljeindustrien. Resultatene brukes til a beregne konsentrasjoner i biorest hvor slike restprodukter brukes. Videre gis en vurdering av miljokonsekvensene ved bruk av denne bioresten pa dyrket jord.