Search for dissertations about: "dormancy"

Showing result 1 - 5 of 49 swedish dissertations containing the word dormancy.

  1. 1. Seed dormancy and germination in an ecological context : comparative studies of annual weeds

    Author : Laila Karlsson; Per Milberg; Ken Thompson; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Asteraceae; Bidens; Compositae; deadnettle; Galinsoga; germination timing; Guizotia; evolution; Labiatae; Lamiaceae; Lamium; morphophysiological dormancy; Papaveraceae; Papaver; Parthenium; physiological dormancy; poppy; summer annual; Tagetes; Verbesina; winter annual; Biology; Biologi;

    Abstract : Germination ecology studies, i.e. studies of interactions between characteristics of the seeds and environmental circumstances, provide understanding of spatial and temporal patterns of emergence of wild species, as weeds in the field. A large number of species have seed dormancy, i. READ MORE

  2. 2. On the Ecology and Evolution of seed and Bud Dormancy

    Author : Patric Nilsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; bet-hedging; overcompensation; herbivory; plant compensatory growth; bud dormancy; endosperm; seed provisioning; Seed dormancy; parent-offspring conflicts; Ecology; Ekologi; Botany; Botanik;

    Abstract : This thesis considers the ecological and evolutionary significance of seed and bud dormancy. First, I present theoretical support to the idea that seed dormancy may evolve as a strategy to reduce sib competition in temporally homogeneous environments. READ MORE

  3. 3. Selection during Early Life Stages and Local Adaptation in Arabidopsis thaliana

    Author : Froukje M. Postma; Jon Ågren; Kathleen Donohue; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Dormancy cycling; Germination timing; Maternal effects; Natural variation; QTL mapping; Seed bank; Seed dormancy; Structural Equation Modeling; Biology with specialization in Ecological Botany; Biologi med inriktning mot ekologisk botanik;

    Abstract : Organisms are often adapted to their local environment, but the role of early life stages in adaptive differentiation among populations remains poorly known. The aim of my thesis was to investigate the contribution of early life stages to the magnitude and genetic basis of local adaptation, and to identify the underlying adaptive traits. READ MORE

  4. 4. Strategy games; on survival and reproduction

    Author : Helen Olofsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ekologi; Ecology; evolution of sexual reproduction; dormancy; game theory; migration; bet-hedging; Life history theory;

    Abstract : Classical evolutionary life history concerns questions such as optimal timing of maturation, life span and number of offspring. These questions have mostly been studied theoretically under the assumption that the environment is stable and without taking into account frequency and density dependence. READ MORE

  5. 5. Interplay of human macrophages and Mycobacterium tuberculosis phenotypes

    Author : Johanna Raffetseder; Maria Lerm; Olle Stendahl; Vesa Loitto; Trude Helen Flo; Linköpings universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; NATURVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; NATURAL SCIENCES; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES; Mycobacterium tuberculosis; tuberculosis; macrophage; innate immunity; host-pathogen interaction; antibiotic tolerance; phagosomal maturation; bacterial phenotype; dormancy; persistence; virulence factor; ESAT-6; ESX-1;

    Abstract : Mycobacterium tuberculosis (Mtb) is the pathogen causing tuberculosis (TB), a disease most often affecting the lung. 1.5 million people die annually due to TB, mainly in low-income countries. READ MORE