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.
2019
Sammendrag
No abstract has been registered
Sammendrag
Rhodiola rosea is a highly valued herbal medicinal plant. It is growing wild in most parts of Norway and mountainous areas around the world. The marker compounds are salidroside, cinnamyl alcohol, glycosides (rosine, rosavine, rosarine), flavonoids (rhodionin, rhodiosin, rhodiolin) and terpens (Galambosi 1999), where the rosavins are unique to R. rosea. In Norway, germplasm collections of R. rosea are maintained by NIBIO; at Apelsvoll in Southern Norway, consisting of 97 different clones. The ranges in content of secondary metabolites in the collection are for rosavin 2.90-85.95 mg g-1, salidroside 0.03-12.85 mg g-1, rosin 0.08-4.75 mg g-1, tyrosol 0.04-2.15 mg g-1 and cinnamyl alcohol 0.02-1.18 mg g-1. A number of different studies have been performed on how biotic and abiotic factors affects the yield of the roots as well the content in metabolites. We find that the flowering of the plant is dependent on cool temperatures during dormancy and thus climatic changes may affect the plant development as well as the production of metabolites. Studies performed in Norway as well as between European countries shows that geographical location affects the content of metabolites and here also variation in clones are a player. In the present presentation results from these and more studies will be presented. Also comprising results on the effect of white-, blue- and red light on the growth and chemical composition of greenhouse grown plants.
Forfattere
Inger MartinussenSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Forfattere
Pia Heltoft ThomsenSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Sammendrag
An annual sheep production system in Norway incorporates grazing natural pastures for five months. Yet no measurements of enteric methane emissions from grazing sheep have been performed under Norwegian conditions. A pilot study was conducted with 12 Norwegian White ewes to test the feasibility of using the sulphur hexafluoride (SF6) tracer technique under Norwegian conditions. The ewes were split onto one of two pastures, mixed grass (Bromus inermis dominated, Poa pratensis, Festuca pratensis) or white clover (Trifolium repens). After five days adaptation to pastures, breathe samples were collected into evacuated one L PVC canisters over three consecutive days where capillary tubes (0.38 to 0.42 mL/min initial flow) restricted flow. Gas samples were analysed by gas chromatography. Feed intakes were not recorded. Average live weights were 64 kg and 66 kg for ewes on grass and clover pastures, respectively. Methane emissions were 23.9 g/d from sheep on mixed grass and 28.2 g/d for sheep on white clover. Methane emissions were not correlated (p=0.33) to ewe live weight. One explanation for the 15% difference in methane emission could be differences in feed intake. The few days of sample collection could also explain some of the observed difference since the technique is recommended to be used over five days to reduce errors in observations. This pilot study shows that using the SF6-technique is a feasible method for future research. More experiments measuring enteric methane emission over a longer period from grazing sheep and cattle under Norwegian conditions are planned for the future.
Sammendrag
No abstract has been registered
Forfattere
Wendy Marie WaalenSammendrag
No abstract has been registered
Forfattere
Wendy Marie WaalenSammendrag
No abstract has been registered