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The significance of age, plant density and proximity of young Silene dioica populations on the incidence and prevalence of anther-smut disease (Microbotryum silenes-diocae)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Most life forms, including plants, are more or less susceptible to infection by pathogens. Whereas plant-pathogen interactions are well studied in human-managed systems they are less known in natural ecosystems. In this thesis the interactions between the sterilising anther-smut fungus Microbotryum silenes-dioicae and the host plant Silene dioica were studied in natural habitats in the Skeppsvik archipelago in northern Sweden. The purpose was to study some population characteristics that can potentially influence the colonization of anther-smut (Microbotryum silenes-dioicae) in young Silene dioica populations. Specifically, it was tested whether the population age, floral-  and total density, population size and distances to nearest diseased populations affect incidence of disease (presence of disease) and prevalence of disease (proportion of diseased individuals in populations) in younger host populations. It was found that incidence and prevalence of disease increased with host population age and size. In addition, it was seen that distances to diseased populations could not explain incidence or prevalence of disease. These results can potentially be used to predict disease risk in similar plant-pathogen systems. 

Place, publisher, year, edition, pages
2016. , 22 p.
Keyword [en]
Silene dioica, Microbotryum silenes-dioicae, neighbourhood, population age, Skeppsvik archipelago
National Category
Biological Sciences
URN: urn:nbn:se:umu:diva-114544OAI: diva2:896963
Educational program
Master's Programme in Ecology
Available from: 2016-01-24 Created: 2016-01-22 Last updated: 2016-01-24Bibliographically approved

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Department of Ecology and Environmental Sciences
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