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.

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2003

– Multiplex real-time PCR for monitoring Heterobasidion annosum colonization in Norway spruce clones that differ in disease resistance

Ari M. Hietala, Morten Eikenes, Harald Kvaalen, ...

Applied and Environmental Microbiology, 69 2003. 4413-4420

Authors

Ari M. Hietala Morten Eikenes Harald Kvaalen Halvor Solheim Carl Gunnar Fossdal

Abstract

A multiplex real-time PCR assay was developed to monitor the dynamics of the Picea abies-Heterobasidion annosum pathosystem. Tissue cultures and 32-year-old trees with low or high resistance to this pathogen were used as the host material. Probes and primers were based on a laccase gene for the pathogen and a polyubiquitin gene for the host.The real-time PCR procedure was compared to an ergosterol-based quantification method in a tissue culture experiment, and there was a strong correlation product moment correlation coefficient, 0.908) between the data sets. The multiplex real-time PCR procedure had higher resolution and sensitivity during the early stages of colonization and also could be used to monitor the host.In the tissue culture experiment, host DNA was degraded more rapidly in the clone with low resistance than in the clone with high resistance. In the field experiment, the lesions elicited were not strictly proportional to the area colonized by the pathogen.Fungal colonization was more restricted and localized in the lesion in the clone with high resistance, hereas in the clone with low resistance, the fungus could be detected until the visible end of the lesion. Thus, the real-time PCR assay gives better resolution than does the traditionally used lesion length measurement when screening host clones for resistance.

– Rot and butt rot in Norway spruce stands following thinning done in summer and winter

Halvor Solheim

In: Thomsen, I.M. (ed.): Forest health problems in older forest stands. Proceedings of the Nordic/Baltic Forest Pathology Meeting, Denmark, September 2002. Skov & Landskab. Reports, 13 2003. 13-20

Authors

Halvor Solheim

Abstract

No abstract has been registered

– RESROBS: Resistance of spruce to root and butt rot disease, an EU-funded research program

Stephen Woodward, Jan Stenlid, Marco Michelozzi, ...

In: Laflamme, G., Berube, J.A. & Bussieres (eds.): Root and butt rots of forest trees. 10th Int. Conf. Root and Butt Rots. Proc. IUFRO WP 7.02.01, Quebec City, Canada, Sept. 16-22, 2001. Laurentian Forestry Centre. Information Report, LAU-X-126 2003. 375-377

Authors

Stephen Woodward Jan Stenlid Marco Michelozzi Halvor Solheim B. Karlsson Panaghiotis Tsopelas

Abstract

No abstract has been registered

– The needle blight fungusDelphinella abietis attacksAbies species in western Norway

Halvor Solheim

In: Thomsen, I.M. (ed.): Forest health problems in older forest stands. Proceedings of the Nordic/Baltic Forest Pathology Meeting, Denmark, September 2002. Skov & Landskab. Reports, 13 2003. 34-37

Authors

Halvor Solheim

Abstract

No abstract has been registered

– Red belts. Occurrences in Norway in 2002

Halvor Solheim, Kåre Olav Venn

In: Thomsen, I.M. (ed.): Forest health problems in older forest stands. Proceedings of the Nordic/Baltic Forest Pathology Meeting, Denmark, September 2002. Skov & Landskab. Reports, 13 2003. 52-58

Authors

Halvor Solheim Kåre Olav Venn

Abstract

No abstract has been registered

– Stress-developed changes in monoterpene composition in stem phloem of Pinus sylvestris

M. Persson, J. Lönnquist, Bo Långström, ...

In: Persson, M.: Chemodiversity and function of monoterpene hydrocarbones in conifers. Doctoral thesis Royal inst. Technol. Dept. Chem., Org. Chem. Forskningsrapport 2003:83 (paper VIII, 10 pp.), 2003.

Authors

M. Persson J. Lönnquist Bo Långström Halvor Solheim M. Kyto Anna-Karin Borg-Karlson

Abstract

No abstract has been registered

Academic article – The putative gymnosperm plant defensin polypeptide (SPI1) accumulates after seed germination, is not readily released, and the SPI1 levels are reduced in Pythium dimorphum-infected spruce roots

Carl Gunnar Fossdal, Nina Elisabeth Nagy, Praveen Sharma, ...

Plant Molecular Biology, 52, 2003

To document

Authors

Carl Gunnar Fossdal Nina Elisabeth Nagy Praveen Sharma Anders Lønneborg

Abstract

No abstract has been registered

2002

Conference lecture – Increase of loose smut in barley seeds last year

Guro Brodal

4th ISTA PDC Seed health symposium, 2002

Authors

Guro Brodal

Abstract

No abstract has been registered

Academic chapter – Induction of defence responses and snow mould resistance in cereals and perennial ryegrass

Åshild Ergon, Anne-Marte Tronsmo, Ingerd Skow Hofgaard

IOBC/wprs Bulletin, 6 2002

Authors

Åshild Ergon Anne-Marte Tronsmo Ingerd Skow Hofgaard

Abstract

The effect of cold acclimation and defence activators on snow mould resistance and expression of pathogenesis-related (PR-) genes were investigated in winter cereals and perennial ryegrass. Cold acclimation, known to induce snow mould resistance, had apotentiating effect on snow mould-induced PR-gene expression in winter wheat. Chitosan treatment induced chitinase expression and in some cases also snow mould resistance in winter wheat. Bion treatment reduced snow mould resistance in perennial ryegrass.

– Globalisation and invasive alien species

Bjørn Åge Tømmerås, A. Jelmert, Trond Rafoss, ...

Globalisation Project report, 15 2002. 88 s.

Authors

Bjørn Åge Tømmerås A. Jelmert Trond Rafoss Leif Sundheim Frode Ødegaard Bjørn Økland

Abstract

No abstract has been registered

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