Sökning: "lignification"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet lignification.

  1. 1. New regulators of xylem lignification in arabidopsis

    Författare :Bernadette Sztojka; Hannele Tuominen; Simon Hawkins; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Xylem; lignin; Arabidopsis; secondary cell wall; transcriptional regulation; lignin-biosynthetic gene; S G lignin ratio;

    Sammanfattning : The ability of land plants to grow upright, bear their own weight and withstand adverse environmental conditions is largely dependent on the secondary xylem tissues of the stem. The xylem cells acquire thick secondary cell walls which are composed of cellulose, hemicellulose and lignin. LÄS MER

  3. 2. Cellular Control and Physiological Importance of Vascular Lignification

    Författare :Leonard Blaschek; Edouard Pesquet; Richard Sibout; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; växtfysiologi; Plant Physiology;

    Sammanfattning : Lignin is indispensable for vascular plants. It allows their cells to coalesce into gravity-defying giants, hardens them to withstand pressures and predators, and waterproofs them to allow the flow of water only where it is advantageous. LÄS MER

  4. 3. Cellular Aspects of Lignin Biosynthesis in Xylem Vessels of Zinnia and Arabidopsis

    Författare :Henrik Serk; Edouard Pesquet; Simon Hawkins; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lignin; tracheary elements; xylem wood; post-mortem lignification; non-cell autonomous process; xylem parenchyma; endoreplication; reactive oxygen species; laccases; peroxidases; molecular cell biology; molekylär cellbiologi;

    Sammanfattning : Lignin is the second most abundant biopolymer on earth and is found in the wood (xylem) of vascular land plants. To transport the hydro-mineral sap, xylem forms specialized conduit cells, called tracheary elements (TEs), which are hollow dead cylinders reinforced with lateral secondary cell walls (SCW). LÄS MER

  5. 4. Xylem cells cooperate in the control of lignification and cell death during plant vascular development

    Författare :Sacha Escamez; Hannele Tuominen; Andrew Groover; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Xylem; Arabidopsis; programmed cell death; tracheary element; xylem vessel; autophagy; metacaspase; lignin; secondary cell wall; chromatin; gene expression;

    Sammanfattning : The evolutionary success of land plants was fostered by the acquisition of the xylem vascular tissue which conducts water and minerals upwards from the roots. The xylem tissue of flowering plants is composed of three main types of cells: the sap-conducting tracheary elements (TE), the fibres which provide mechanical support and the parenchyma cells which provide metabolic support to the tissue. LÄS MER

  7. 5. Ethylene and Auxin in the Control of Wood Formation

    Författare :Jenny Maria Hellgren; SLU; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; auxin ; ethylene ; lignification ; growth rate ; fibres ; cambium ; gas chromatography ; reaction wood ; organic acids ; mass spectrometry ; populus tremula ; pinus sylvestris; biology; biologi;

    Sammanfattning : This thesis considers aspects of the regulation of growth rate and fibre properties in forest trees. These properties are both genetically determined and influenced by environmental stimuli. Induction of reaction wood is an environmentally induced process involving changes in growth rate and fibre properties that can be readily studied. LÄS MER