Summary Scleroderris canker caused by Gremmeniella abietina is one of the most serious diseases of Scots pine (pinus sylvestris) in Finland. Correspondingly, the pathogen has been the most seriousdamaging agent in red pine (pinus resinosa) plantations in Quebec, Canada. The present research and Finnish-Canadian cooperation concentrates on studying, from cellular to tree level, the relationship of nutrition, CO2 concentration and climatic factors to the development of scleroderris canker. Together with our earlier results, the research will form a mutilevel analysis on pathosystems with G. abietina in a changing environment. An expreimental approach involving experiments in controlled conditions is applied. Different light and electron microscopic techniques are used to analyze the structure and function of the host-pathogen system at the tissure and cellular levels.Special microscopic techniques like X-ray microanalysis, epifluorescence, enzymes and antibodies conjugated to colloidal gold and genomic probes (following in situ hybridization) will be applied. The tree level analysis is based on seedling experiments involving measurements of disease symptoms and phtosynthesis rate, and estimation of annual photosynthetic production of the seedlings. The research is based on the Finnish-Canadian cooperation that was started towards the end of 1993 and is continuing during Ylimartimo s present research stay at Canadian Forest Service-Quebec (LFC), where our studies focus on ultrastructure and cytochemistry of the infection processes of G. abietina. The research is also a continuation of the cooperation with the scientists working in the Finnish Research Programme on Climate Change (SILMU) at the department of Forest Ecology, University of Helsinki.The SILMU cooperation is concentrating on analyzing the relationship between annual photsynthetic production of Scots pine and the development of scleroderris canker in increased CO2 concentrations.The research is being carried out at University of Helsinki(Dept. of Forest Ecology, Dept. of Plant Biology/Forest Pahjology, Dept. of Electron Microscopy, and Forestry Field Station), at Canadian Forest Service (LFC), and Universite Laval (Centre de Recherche en Biologie Forestiere).
Vastaava tutkija
Ylimartimo Anneli, Helsingin yliopisto, Metsäekologian laitos Hankkeen kesto 1995 - 1995
Asiasanat
ravinne-epätasapaino, hienorakenne, sytokemia, rtg-mikroanalyysi
Hankkeen vaihe: päättynyt
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