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.
2013
Authors
Arne StensvandAbstract
No abstract has been registered
Authors
Aruppillai Suthaparan Arne Stensvand Knut Asbjørn Solhaug Nils Bjugstad David Gadoury Hans Ragnar GislerødAbstract
No abstract has been registered
Authors
Ivano Brunner Isabella Børja Lise Dalsgaard Gaby Deckmyn Alf Ekblad Douglas L. Godbold Irene Guerra Avalos Martin Lukac Karsten Kalbitz Kaie Kriiska Ivika Ostonen Andrea Schnepf Primož Simončič Elena VanguelovaAbstract
No abstract has been registered
Authors
Sabine Rosner Jan Svetlik Kjell Andreassen Isabella Børja Lise Dalsgaard R Evans B Karlsson Mari Mette Tollefsrud Svein SolbergAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Venche Talgø Maria Herrero May Bente Brurberg Louisa Kitchingman Kari H. Telfer Gunn StrømengAbstract
No abstract has been registered
Authors
Gunn Strømeng May Bente Brurberg Maria Herrero Willy Couanon Arne Stensvand Isabella Børja Venche TalgøAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Igor A. Yakovlev Ari Hietala Pierre-Emmanuel Courty Taina Lundell Halvor Solheim Carl Gunnar FossdalAbstract
The pathogenic white-rot basidiomycete Heterobasidion irregulare is able to remove lignin and hemicellulose prior to cellulose during the colonization of root and stem xylem of conifer and broadleaf trees. We identified and followed the regulation of expression of genes belonging to families encoding ligninolytic enzymes. In comparison with typical white-rot fungi, the H. irregulare genome has exclusively the short-manganese peroxidase type encoding genes (6 short-MnPs) and thereby a slight contraction in the pool of class II heme-containing peroxidases, but an expansion of the MCO laccases with 17 gene models. Furthermore, the genome shows a versatile set of other oxidoreductase genes putatively involved in lignin oxidation and conversion, including 5 glyoxal oxidases, 19 quinone-oxidoreductases and 12 aryl-alcohol oxidases. Their genetic multiplicity and gene-specific regulation patterns on cultures based on defined lignin, cellulose or Norway spruce lignocellulose substrates suggest divergent specificities and physiological roles for these enzymes. While the short-MnP encoding genes showed similar transcript levels upon fungal growth on heartwood and reaction zone (RZ), a xylem defense tissue rich in phenolic compounds unique to trees, a subset of laccases showed higher gene expression in the RZ cultures. In contrast, other oxidoreductases depending on initial MnP activity showed generally lower transcript levels on RZ than on heartwood. These data suggest that the rate of fungal oxidative conversion of xylem lignin differs between spruce RZ and heartwood. It is conceivable that in RZ part of the oxidoreductase activities of laccases are related to the detoxification of phenolic compounds involved in host-defense. Expression of the several short-MnP enzymes indicated an important role for these enzymes in effective delignification of wood by H. irregulare.
Authors
Merete Dees Mads Sønderkær Monica Skogen Even Sannes Riiser Vinh Hong Le Kåre Lehman Nielsen May Bente BrurbergAbstract
No abstract has been registered