Search for dissertations about: "Land plant evolution"

Showing result 1 - 5 of 16 swedish dissertations containing the words Land plant evolution.

  1. 1. Plant lipid transfer proteins : Evolution, expression and function

    Author : Monika Edstam; Johan Edqvist; Kristina Blomqvist; Jenny Hagenblad; Frederica Theodoulou; Linköpings universitet; []
    Keywords : ;

    Abstract : The plant non-specific lipid transfer proteins (nsLTPs) are known for the ability to transfer different lipids in vitro, but their in vivo functions have not yet been elucidated. They seem to play a role in the defense against biotic and abiotic stresses; the gene expression of nsLTPs is often upregulated when exposed to stresses. READ MORE

  2. 2. Functional analyses of growth and development in the liverwort Marchantia polymorpha

    Author : Anja Billhardt; D. Magnus Eklund; Marcel Quint; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Land plant evolution; Bryophytes; Marchantia polymorpha; Dormancy; Circadian clock;

    Abstract : Land plants developed from a freshwater charophycean algae about 500 million years ago. Today, they consist of two main clades, the vascular plants and the non-vascular bryophytes including hornworts, liverworts and mosses. READ MORE

  3. 3. Studies on Natural Variation and Evolution of Photoperiodism in Plants

    Author : Karl Holm; Ulf Lagercrantz; Martin Lascoux; Seth Jon Davis; Uppsala universitet; []
    Keywords : photoperiodism; circadian; flowering time; natural variation; evolution; Caspella bursa-pastoris; Physcomitrella patens; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics;

    Abstract : Photoperiodism refers to the organism’s ability to detect and respond to seasonal changes in the daily duration of light and dark and thus constitutes one of the most significant and complex examples of the interaction between the organism and its environment. This thesis attempts to describe the prevalence of variation in a photoperiodic response, its adaptive value, and its putative genetic basis in a common cruciferous weed, Capsella bursa-pastoris (Brassicaceae). READ MORE

  4. 4. Rates and patterns of bryophyte molecular evolution

    Author : Anna-Malin Linde; Ulf Lagercrantz; Nils Cronberg; D. Magnus Eklund; Jonathan Shaw; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics;

    Abstract : Plants have been growing on land for at least 450 million years. The bryophytes comprising the three phyla liverworts, mosses and hornworts, are considered to be the closest extant relatives to the plants that colonized land. READ MORE

  5. 5. Plant and microbial xyloglucanases: Function, Structure and Phylogeny

    Author : Jens Eklöf; Harry Brumer; Harry Gilbert; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; xyloglucan; xyloglucanases; XTH; XET; XEH; endoglucanases; EG16; Molecular biology; Molekylärbiologi;

    Abstract : In this thesis, enzymes acting on the primary cell wall hemicellulose xyloglucan are studied.  Xyloglucans are ubiquitous in land plants which make them an important polysaccharide to utilise for microbes and a potentially interesting raw material for various industries. READ MORE