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.
2022
Forfattere
Randi Bolli Ingunn H. Gudmundsdottir Monsås Agnethe Christiansen Kari Stuveseth Maren Kolltveit BakkebøSammendrag
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Forfattere
Sigridur DalmannsdottirSammendrag
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Forfattere
Johannes BreidenbachSammendrag
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Forfattere
Jane Uhd Jepsen James David Mervyn Speed Gunnar Austrheim Graciela Rusch Tanja Kofod Petersen Johan Asplund Jarle W. Bjerke Anne Elisabeth Bjune Nina Elisabeth Eide Ivar Herfindal Rolf Anker Ims Markus Fjellstad Israelsen Jutta Kapfer Anders Lorentzen Kolstad Jenni Nordén Brett Sandercock Jenny Stien Ole Einar Ellingbø Tveito Nigel YoccozSammendrag
Norway, Ecosystem assessment, Ecosystem condition, Ecosystem state, System for Assessment of Ecological Condition, Norge, Økosystemvurdering, Økosystemtilstand, Økologisk tilstand, System for vurdering av økologisk tilstand, Fagpanelmeto-den
Forfattere
Trond HofsvangSammendrag
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Forfattere
Nina Elisabeth Nagy Hans Ragnar Norli Monica Fongen Runa Berg Østby Inger Heldal Jahn Davik Ari HietalaSammendrag
Tree defense against xylem pathogens involves both constitutive and induced phenylpropanoids and terpenoids. The induced defenses include compartmentalization of compromised wood with a reaction zone (RZ) characterized by polyphenol deposition, whereas the role of terpenoids has remained poorly understood. To further elucidate the tree–pathogen interaction, we profiled spatial patterns in lignan (low-molecular-weight polyphenols) and terpenoid content in Norway spruce (Picea abies) trees showing heartwood colonization by the pathogenic white-rot fungus Heterobasidion parviporum. There was pronounced variation in the amount and composition of lignans between different xylem tissue zones of diseased and healthy trees. Intact RZ at basal stem regions, where colonization is the oldest, showed the highest level and diversity of these compounds. The antioxidant properties of lignans obviously hinder oxidative degradation of wood: RZ with lignans removed by extraction showed significantly higher mass loss than unextracted RZ when subjected to Fenton degradation. The reduced diversity and amount of lignans in pathogen-compromised RZ and decaying heartwood in comparison to intact RZ and healthy heartwood suggest that α-conindendrin isomer is an intermediate metabolite in lignan decomposition by H. parviporum. Diterpenes and diterpene alcohols constituted above 90% of the terpenes detected in sapwood of healthy and diseased trees. A significant finding was that traumatic resin canals, predominated by monoterpenes, were commonly associated with RZ. The findings clarify the roles and fate of lignan during wood decay and raise questions about the potential roles of terpenoids in signal transduction, synthesis, and translocation of defense compounds upon wood compartmentalization against decay fungi.
Forfattere
Bente Føreid Siv Mari Aurdal Astrid Solvåg Nesse Ingrid Myrstad Trine Hvoslef-Eide Maria DietrichSammendrag
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