Search for dissertations about: "Secondary Cell Walls"

Showing result 6 - 10 of 29 swedish dissertations containing the words Secondary Cell Walls.

  2. 6. The role of auxin in abscission of organs and tissues

    Author : Xu Jin; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Most deciduous trees drop their leaves before winter, a process which is referred to as leaf abscission. Leaf abscission is thought to be regulated by the action of auxin and ethylene. READ MORE

  4. 7. Significance of hydrolytic enzymes expressed during xylem cell death

    Author : Benjamin Bollhöner; Hannele Tuominen; Moritz Nowack; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis; Populus; xylem cell death; metacaspase; fiber; lateral root emergence; molekylärbiologi; Molecular Biology; Physiological Botany; fysiologisk botanik; molecular cell biology; molekylär cellbiologi;

    Abstract : Xylem is an inherent feature of all vascular plants and functions in water transport and mechanical support. In order to efficiently transport water, xylem cells are reinforced by secondary walls before they undergo programmed cell death and their cell contents are removed by autolysis to create a hollow tube. READ MORE

  5. 8. Local variability in chemical and physical properties of spruce wood fibers

    Author : Anna Bergander; KTH; []
    Keywords : cell walls; chemical composition; elastic constants; elastic strength; Fiber properties; Fibril angles; Mathematical models; Microscopy techniques; Picea Abies; Stiffness; Tensile properties; Wood polymers; Wood;

    Abstract : Wood is well known to be a heterogeneous native materialwith large variations in its composite properties, includingvariations whose origins have not yet been completelyidentified. Traditionally, the macroscopic variations in woodhave received the most attention; for example, the variation indensity from the pith to the bark in trees. READ MORE

  6. 9. Cellulose synthases in Populus- identification, expression analyses and in vitro synthesis

    Author : Soraya Djerbi; Tuula Teeri; Petter Gustafsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose synthase; Populus; secondary cell wall; gene upregulation; cell suspension culture; stationary phase; Bioengineering; Bioteknik;

    Abstract : Cellulose is a biopolymer of great relevance in the plant cell walls, where it constitutes the most important skeletal component. Cellulose is also an important raw material in the pulp- and paper, forest, and textile industries, among others. READ MORE

  7. 10. Ultrastructure of the wood cell wall

    Author : Jonas Hafrén; KTH; []
    Keywords : ;

    Abstract : The ultrastructure of wood fibres has been studied incambial cells, differentiating fibres and mature xylem fibres,using the Rapid-Freeze Deep-Etching (RFDE) technique combinedwith transmission electron- and epifluorescence microscopy.Pectin distribution in mature wood fibres, and in fibres duringdevelopment, have been studied by immunolabelling. READ MORE