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
Severin WoxholttSammendrag
Det er ikke registrert sammendrag
Forfattere
Celine Rebours Marte MelandSammendrag
The Netalgae project was established to support the European seaweed industry through the creation of an industry network to encourage co-operation amongst the seaweed industries and stakeholders across the project area. The project had a secondary aim, specifically to create best practise guidelines for the regulation administration and management of seaweed resources and related activities across the project area. This document provides an overview of the Norwegian seaweed industry, its history, evolution and current status, the document outlines the scale, scope, value and the key raw materials used by the industry. The document also describes the regulatory and management systems in Norway. The Norwegian seaweed industry is almost completely reliant on natural beds of Ascophyllum nodosum and Laminaria hyperborea. L. hyperborea accounts for about 90% of the national harvest. Mecanical harvesting provides almost all of Norways national seaweed output. Manual harvesting of other species such as Ulva spp is carried out at very low levels, mainly for the provision of high quality raw material to restaurant or grocery stores. Seaweed aquaculture is under development but generates very little biomass. The Alginate Industry is by far the most important sector, consuming the vast majority of the seaweed processed in Norway (domestic and imports). The rest is used directly as food, fodder, biostimulants, cosmetics, aquaculture and in health sectors. In Norway, regulations for harvesting seaweed apply to seabed algae such as Laminaria hyperborea. Harvest of foreshore algae such as Ascophyllum nodosum is not regulated, but is regulated by private owner rights because the species grow in the tidal zone. Environmental protection laws and other regulations can restrict areas for harvesting. Regulations of aquaculture of seaweed are under development.
Forfattere
Nina Elisabeth Nagy Harald Kvaalen Monica Fongen Carl Gunnar Fossdal Nicholas Clarke Halvor Solheim Ari HietalaSammendrag
Pathogen challenge of tree sapwood induces the formation of reaction zones with antimicrobial properties such as elevated pH and cation content. Many fungi lower substrate pH by secreting oxalic acid, its conjugate base oxalate being a reductant as well as a chelating agent for cations. To examine the role of oxalic acid in pathogenicity of white-rot fungi, we conducted spatial quantification of oxalate, transcript levels of related fungal genes, and element concentrations in heartwood of Norway spruce challenged naturally by Heterobasidion parviporum. In the pathogen-compromised reaction zone, upregulation of an oxaloacetase gene generating oxalic acid coincided with oxalate and cation accumulation and presence of calcium oxalate crystals. The colonized inner heartwood showed trace amounts of oxalate. Moreover, fungal exposure to the reaction zone under laboratory conditions induced oxaloacetase and oxalate accumulation, whereas heartwood induced a decarboxylase gene involved in degradation of oxalate. The excess level of cations in defense xylem inactivates pathogen-secreted oxalate through precipitation and, presumably, only after cation neutralization can oxalic acid participate in lignocellulose degradation. This necessitates enhanced production of oxalic acid by H. parviporum. This study is the first to determine the true influence of white-rot fungi on oxalate crystal formation in tree xylem.
Forfattere
Sølvi WehnSammendrag
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Forfattere
Anna Birgitte MilfordSammendrag
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Sammendrag
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Forfattere
Jogeir N. StoklandSammendrag
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Sammendrag
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Forfattere
Stefanos Xenarios Kostas BithasSammendrag
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Forfattere
Grete Helen Meisfjord Jørgensen Knut Egil BøeSammendrag
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