Browsing NIBIO Brage by Author "Nagy, Nina Elisabeth"
Now showing items 1-18 of 18
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Cell wall changes during brown rot degradation of furfurylated and acetylated wood
Thygesen, Lisbeth G.; Beck, Greeley; Nagy, Nina Elisabeth; Alfredsen, Gry (Peer reviewed; Journal article, 2021-05-30)This study explores cell wall changes in Radiata pine (Pinus radiata) after modification with acetylation or furfurylation and subsequent prolonged subjection to the brown rot fungus R. placenta with the aim of better ... -
Effects of mild drought on the morphology of sun and shade needles in 20-year-old Norway spruce trees
Gebauer, Roman; Volařík, Daniel; Urban, Josef; Børja, Isabella; Nagy, Nina Elisabeth; Eldhuset, Toril Drabløs; Krokene, Paal (Journal article; Peer reviewed, 2019-02-28)Several studies have looked at how individual environmental factors influence needle morphology in conifer trees, but interacting effects between drought and canopy position have received little attention. In this study, ... -
Evaluation of gastric processing and duodenal digestion of starch in six cereal meals on the associated glycaemic response using an adult fasted dynamic gastric model
Ballance, Simon; Sahlstrøm, Stefan; Lea, Per; Nagy, Nina Elisabeth; Andersen, Petter V.; Dessev, Tzvetelin; Hull, Sarah; Vardakou, Maria; Faulks, Richard (Journal article; Peer reviewed, 2013-03)Purpose: To identify the key parameters involved in cereal starch digestion and associated glycaemic response by the utilisation of a dynamic gastro-duodenal digestion model. Methods: Potential plasma glucose loading curves ... -
Fungal diversity and seasonal succession in ash leaves infected by the invasive ascomycete Hymenoscyphus fraxineus
Cross, Hugh; Sønstebø, Jørn Henrik; Nagy, Nina Elisabeth; Timmermann, Volkmar; Solheim, Halvor; Børja, Isabella; Kauserud, Håvard; Carlsen, Tor; Rzepka, Barbara; Wasak, Katarzyna; Vivian-Smith, Adam; Hietala, Ari Mikko (Journal article; Peer reviewed, 2017-01-12)High biodiversity is regarded as a barrier against biological invasions. We hypothesized that the invasion success of the pathogenic ascomycete Hymenoscyphus fraxineus threatening common ash in Europe relates to differences ... -
Fungal succession in decomposing ash leaves colonized by the ash dieback pathogen Hymenoscyphus fraxineus or its harmless relative Hymenoscyphus albidus
Kosawang, Chatchai; Børja, Isabella; Herrero, Maria-Luz; Nagy, Nina Elisabeth; Nielsen, Lene R.; Solheim, Halvor; Timmermann, Volkmar; Hietala, Ari Mikko (Peer reviewed; Journal article, 2023-04-14)Introduction: The ascomycete Hymenoscyphus fraxineus, originating from Asia, is currently threatening common ash (Fraxinus excelsior) in Europe, massive ascospore production from the saprotrophic phase being a key determinant ... -
Furfurylated wood: impact on Postia placenta gene expression and oxalate crystal formation
Alfredsen, Gry; Fossdal, Carl Gunnar; Nagy, Nina Elisabeth; Jody, Jellison; Barry, Goodell (Journal article; Peer reviewed, 2016-03-24)Modified wood can provide protection against a range of wood deteriorating organisms. Several hypotheses have been put forward regarding the protection mechanisms against wood decaying fungi including fungal enzyme ... -
Host−Pathogen Interactions in Leaf Petioles of Common Ash and Manchurian Ash Infected with Hymenoscyphus fraxineus
Nielsen, Lene R.; Nagy, Nina Elisabeth; Piqueras, Sara; Kosawang, Chatchai; Thygesen, Lisbeth G.; Hietala, Ari Mikko (Peer reviewed; Journal article, 2022-02-05)Some common ash trees (Fraxinus excelsior) show tolerance towards shoot dieback caused by the invasive ascomycete Hymenoscyphus fraxineus. Leaf petioles are considered to serve as a pathogen colonization route to the shoots. ... -
The Native Hymenoscyphus albidus and the Invasive Hymenoscyphus fraxineus Are Similar in Their Necrotrophic Growth Phase in Ash Leaves
Hietala, Ari Mikko; Agan, Ahto; Nagy, Nina Elisabeth; Børja, Isabella; Timmermann, Volkmar; Drenkhan, Rein; Solheim, Halvor (Peer reviewed; Journal article, 2022-05-27)The populations of European ash and its harmless fungal associate Hymenoscyphus albidus are in decline owing to ash dieback caused by the invasive Hymenoscyphus fraxineus, a fungus that in its native range in Asia is a ... -
Patterns and roles of lignan and terpenoid accumulation in the reaction zone compartmentalizing pathogen-infected heartwood of Norway spruce
Nagy, Nina Elisabeth; Norli, Hans Ragnar; Fongen, Monica; Østby, Runa Berg; Heldal, Inger; Davik, Jahn; Hietala, Ari Mikko (Peer reviewed; Journal article, 2022-02-10)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 ... -
Progression of Ash Dieback in Norway Related to Tree Age, Disease History and Regional Aspects
Timmermann, Volkmar; Nagy, Nina Elisabeth; Hietala, Ari Mikko; Børja, Isabella; Solheim, Halvor (Journal article; Peer reviewed, 2017)Ash dieback, caused by the ascomycete Hymenoscyphus fraxineus, has been spreading throughout Europe since the early 1990s, threatening European ash at a continental scale. Little is known about the development of the disease ... -
Propagule pressure build-up by the invasive Hymenoscyphus fraxineus following its introduction to an ash forest inhabited by the native Hymenoscyphus albidus.
Hietala, Ari Mikko; Børja, Isabella; Solheim, Halvor; Nagy, Nina Elisabeth; Timmermann, Volkmar (Journal article; Peer reviewed, 2018-07-30)Dieback of European ash, caused by the ascomycete Hymenoscyphus fraxineus originating from Asia, has rapidly spread across Europe, and is threatening this keystone tree at a continental scale. High propagule pressure is ... -
The Relationship between Fungal Diversity and Invasibility of a Foliar Niche—The Case of Ash Dieback
Agan, Ahto; Drenkhan, Rein; Adamson, Kalev; Tedersoo, Leho; Solheim, Halvor; Børja, Isabella; Matsiakh, Iryna; Timmermann, Volkmar; Nagy, Nina Elisabeth; Hietala, Ari Mikko (Peer reviewed; Journal article, 2020-08-26)European ash (Fraxinus excelsior) is threatened by the invasive ascomycete Hymenoscyphus fraxineus originating from Asia. Ash leaf tissues serve as a route for shoot infection but also as a sporulation substrate for this ... -
Skog, trær og bioteknologi
Fossdal, Carl Gunnar; Nagy, Nina Elisabeth; Dalen, Lars Sandved (Brosjyre fra Skog og landskap;3/10, Others, 2010) -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2021
Timmermann, Volkmar; Børja, Isabella; Clarke, Nicholas; Eriksen, Rune; Gohli, Jostein; Hylen, Gro; Jepsen, Jane Uhd; Krokene, Paal; Lange, Holger; Meissner, Helge Rainer; Nagy, Nina Elisabeth; Nordbakken, Jørn-Frode; Solberg, Sverre; Solheim, Halvor; Vindstad, Ole Petter Laksforsmo; Økland, Bjørn; Aas, Wenche (NIBIO Rapport, Research report, 2023)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede ... -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2022
Timmermann, Volkmar; Børja, Isabella; Clarke, Nicholas; Gohli, Jostein; Hietala, Ari Mikko; Jepsen, Jane Uhd; Krokene, Paal; Lislegård, Harald Haga; Nagy, Nina Elisabeth; Nyeggen, Hans; Solberg, Sverre; Solheim, Halvor; Solvin, Thomas Mørtvedt; Svensson, Arvid; Tollefsrud, Mari Mette; Vindstad, Ole Petter Laksforsmo; Økland, Bjørn; Aas, Wenche (NIBIO Rapport, Research report, 2023)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede ... -
Using laser micro-dissection and qRT-PCR to analyze cell type-specific gene expression in Norway spruce phloem
Nagy, Nina Elisabeth; Sikora, Katarzyna; Krokene, Paal; Hietala, Ari; Solheim, Halvor; Fossdal, Carl Gunnar (Journal article; Peer reviewed, 2014)The tangentially oriented polyphenolic parenchyma (PP) and radially organized ray parenchyma in the phloem are central in the defense of conifer stems against insects and pathogens. Laser micro-dissection enables examination ... -
Vegetation survey at Årdal, Sunndal and Mosjøen aluminium smelters in 2019-2020. Impact of fluoride emissions on local vegetation.
Børja, Isabella; Hietala, Ari Mikko; Nagy, Nina Elisabeth; Solheim, Halvor; Timmermann, Volkmar (NIBIO Rapport;7(144) 2021, Research report, 2021-07-12)The scope of this study was to provide an update on fluoride (F) emission effects on vegetation around three aluminium smelters. We visited Årdal and Sunndal smelters in 2019-2020 and Mosjøen in 2020, assessed and documented ... -
Vi tar pulsen på trærne
Børja, Isabella; Clarke, Nicholas; Dreslerová, J; Eldhuset, Toril Drabløs; Gebauer, Roman; Gryc, V; Krokene, Paal; Nagy, Nina Elisabeth; Urban, J; Volařík, Daniel (Glimt fra Skog og landskap;06/10, Others, 2010)Tørkestress hos gran ser ut til å bli et stadig større problem i mange europeiske land. På Skog og landskap har vi et EØS-samarbeidsprosjekt med tsjekkiske forskere fra Mendel-universitetet i Brno hvor vi i detalj undersøker ...