Sökning: "shoot growth"

Visar resultat 1 - 5 av 36 avhandlingar innehållade orden shoot growth.

  1. 1. Effects of enhanced ultraviolet-B radiation on subarctic ecosystems

    Detta är en avhandling från Plant Ecology, Ecology Building, SE-223 62 Lund

    Författare :Carola Gehrke; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pigmentation; photosynthesis; dark respiration; shoot morphology; shoot growth; phanerogams ; species composition cryptogams; productivity; decomposition; dwarf shrubs; bryophytes; peatland ecosystem; heath ecosystem; UV-B; ozone depletion; Plant ecology; Växtekologi;

    Sammanfattning : Biologically harmful ultraviolet-B radiation (UV-B, 280-320 nm) is increasing at the Earth´s surface owing to stratospheric ozone depletion. This is of global concern due to potential impacts of enhanced UV-B radiation on the biosphere. LÄS MER

  2. 2. Models of Mechanics and Growth in Developmental Biology: A Computational Morphodinamics approach

    Detta är en avhandling från Lund University, Faculty of Science, Department of Astronomy and Theoretical Physics

    Författare :Behruz Bozorg; [2016-06]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; plants; morphodynamics; mechanics; anisotropy; growth; microtubules; microfibrils;

    Sammanfattning : Recent evidence has revealed the role of mechanical cues in the development of shapes in organisms. This thesis is an effort to test some of the fundamental hypotheses about the relation between mechanics and patterning in plants. To do this, we develop mechanical models designed to include specific features of plant cell walls. LÄS MER

  3. 3. From growth cessation to bud burst conifer seedling development in response to nursery culture and environmental stimuli

    Detta är en avhandling från Uppsala : School for Forest Management, Swedish University of Agricultural Sciences

    Författare :Elisabeth Wallin; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Picea abies; Pinus sylvestris; Pseudotsuga menziesii; seedling status; gene activity; photoperiod; storability; vitality; transplants; shoot electrolyte leakage; Picea abies; Pinus sylvestris; Pseudotsuga menziesii; plantstatus; genaktivitet; fotoperiod; lagringsbarhet; vitalitet; omskolningsplantor; elektrolytiskt läckage; Energy; Forests and Built Environments; Energi; skog och byggd miljö;

    Sammanfattning : In Sweden, 350-400 million seedlings are produced annually for forest regeneration. About one third of these are overwintered in frozen storage, necessitating accurate methods to assess storability. Young transplants of Norway spruce (Picea abies (L.) Karst. LÄS MER

  4. 4. Future stratospheric ozone depletion will affect a subarctic dwarf shrub ecosystem

    Detta är en avhandling från Biology building

    Författare :Ulf Johanson; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Vaccinium; UVB; subarctic; shoot growth; ozone depletion; leaf thickness; irradiation system; heath ecosystem; Empetrum; dwarf shrubs; Calamagrostis; decomposition; Physiological biophysics; Växtfysiologi;

    Sammanfattning : The stratospheric ozone depletion and the concomitant increase in ultraviolet-B (UV-B, 280-320 nm) radiation is of global concern due to the effects of UV-B on living organisms. To investigate the effects of increased levels of UV-B, a field irradiation system was established at a subarctic dwarf shrub heath in Northern Sweden (68 °N). LÄS MER

  5. 5. Modelling the development of phyllotactic patterns at the shoot apical meristem of Arabidopsis thaliana

    Detta är en avhandling från Biology building

    Författare :Patrik Sahlin; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; systems biology; plant stem cells; computational morphodynamics; shoot apical meristem; Arabidopsis; cell division; Fysicumarkivet A:2010:Sahlin;

    Sammanfattning : The study of phyllotactic patterns have a long history, but the bulk of our detailed understanding of developmental processes in plants comes from research conducted in the last thirty or forty years. New modern techniques have made it possible to study plants in ways that previously was not possible. LÄS MER