Search for dissertations about: "spore release"

Showing result 1 - 5 of 6 swedish dissertations containing the words spore release.

  2. 1. Dispersal of bryophytes across landscapes

    Author : Niklas Lönnell; Kristoffer Hylander; Bengt Gunnar Jonsson; Sebastian Sundberg; Johan Ehrlén; Risto Virtanen; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; anemochory; bryophytes; colonization; connectivity; diaspores; dispersal kernel; establishment; spore dispersal; long-distance dispersal; mechanistic model; mosses; realized dispersal; spore release; Lagrangian stochastic model; wind dispersal; Plant Ecology; växtekologi;

    Abstract : Dispersal, especially long-distance dispersal, is an important component in many disciplines within biology. Many species are passively dispersed by wind, not least spore-dispersed organisms.In this thesis I investigated the dispersal capacity of bryophytes by studying the colonization patterns from local scales (100 m) to landscape scales (20 km). READ MORE

  4. 2. Microbial ecology and virulence gene studies of the insect pathogen Bacillus thuringiensis

    Author : Katarina Eskils; Malte Hermansson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mikrobiologi; Microbiology;

    Abstract : Bacillus thuringiensis (Bt) is a spore-forming bacterium used as a bio-pesticide due to its insect toxicity. Bt was used as a model organism in a risk evaluation project. Prevalence, survival and spreading, as well as genome stability, putative virulence genes, and gene transfer were examined. Field release of a marked Bt subsp. READ MORE

  5. 3. Factors Affecting the Distribution of Rocky-Shore Macroalgae on the Swedish Coast : Morphological, Physiological, Reproductive and Genetic Aspects

    Author : Gustav Johansson; John Raven; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Abstract : The aim of this thesis was to examine factors affecting the distribution of macroalgal species both vertically (depth zonation) and geographically along the Baltic Sea salinity gradient. Interactions between the physical environment and basic biological traits of the algae are emphasised. READ MORE

  6. 4. Monitoring important soil-borne plant pathogens in Swedish crop production using real-time PCR

    Author : Charlotta Almquist; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : The global demand for food will increase considerably in the nearest future and among the major constraints to agricultural productivity are biotic stresses caused by microorganisms. In this thesis, the causal agents of four of the most important soil-borne diseases threatening the Swedish production of oilseed rape, sugar beets and red clover were selected as targets for developing diagnostic assays using real-time PCR. READ MORE

  7. 5. Osmoregulation at different stages of the yeast life cycle

    Author : Cecilia Geijer; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stress signalling; osmoregulation; aquaporins; cerevisiae; germination; germination;

    Abstract : The ability to adapt to changing and potentially harmful conditions in the surrounding environment is crucial for fitness and survival of all living cells; in particular unicellular organisms, since they are frequently exposed to stress factors such as heat, drought, nutritional starvation and toxic substances. The aim of this thesis is to determine how cells respond to osmotic and nutritional changes in the environment and how downstream targets of signalling cascades are regulated. READ MORE