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.
2004
Authors
Nina Elisabeth Nagy Lars Sandved Dalen D. L. Jones B. Swensen Carl Gunnar Fossdal Toril EldhusetAbstract
No abstract has been registered
Authors
Atle WibeAbstract
No abstract has been registered
Authors
H Schmidt A. Adler Arne Holst-Jensen Sonja Klemsdal C.M. Kullnig-Gradinger Antonio Logrieco C.P. Kibecek Robert L. Mach Rudi F. Vogel Helga I. Nirenberg Ulf Thrane Mona Torp Tapani Yli-Mattila Ludwig NiessenAbstract
No abstract has been registered
Authors
Peder Gjerdrum Olav HøibøAbstract
No abstract has been registered
Authors
Alhaji Jeng Trond Knapp Haraldsen Nils Vagstad Arne Grønlund Steinar TveitnesAbstract
Nitrogen, fertilizer, meal
Authors
Rolf Arnt Olsen Grete RasmussenAbstract
No abstract has been registered
Abstract
The anatomical defense responses in stems of Norway spruce (Picea abies) clones of different resistance to pathogenic fungi were characterized over time and distance from small mechanical wounds or wounds inoculated with the root rot fungus Heterobasidion annosum. Common responses for both treatments included division of ray parenchyma and other cells in the cambial zone, accumulation of phenolic inclusions in ray parenchyma cells, activation of phloem parenchyma (PP) cells, and formation of traumatic resin ducts (TDs) in the xylem. TD formation occurred synchronously from a tangential layer of cells, or symplasmic domain, within the zone of xylem mother cells. TD induction is triggered by a signal, which propagates a developmental wave in the axial direction at about 2.5cm per day. TDs are formed at least 30cm above single inoculations within 16–36days after inoculation. The size and number of TDs is attenuated further away from the inoculation site, indicating a dose-dependent activity leading to TD development. Compared to sterile wounding, fungal inoculation gave rise to more and larger TDs in all clones, and multiple rows of TDs in weak clones. Fungal inoculation also induced the formation of more new PP cells, increasing the number of PP cells in the phloem in the year of inoculation up to 100%. TD and PP cell formation was greater in susceptible compared to resistant clones and after fungal versus sterile inoculation. Potential mechanisms responsible for this variable response are discussed.
Authors
Live Semb Vestgarden Petter Nilsen Gunnar AbrahamsenAbstract
No abstract has been registered
Authors
Halvor B. Gjærum Kåre Arnstein Lye Halvor SolheimAbstract
No abstract has been registered
Abstract
No abstract has been registered