Sökning: "Populus"

Visar resultat 21 - 25 av 85 avhandlingar innehållade ordet Populus.

  1. 21. Investigation of genes and proteins involved in xylan biosynthesis

    Författare :Anders Winzell; Ines Ezcurra; Johan Edqvist; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Populus; xylan biosynthesis; hemicellulose; glycosyltransferase; GT43; IRX; glycoside hydrolase; GH10; Xyn10A; CAZy; transcription factor; MYB; wood formation; secondary cell wall; Arabidopsis; Molecular biology; Molekylärbiologi;

    Sammanfattning : Wood formation or xylogenesis is a fundamental process for so diverse issues as industry, shelter and a sustainable environment. Wood is comprised of secondary xylem, rigid large cells with thick cell walls that are lignified. LÄS MER

  3. 22. Phenolics, Nitrogen, and Biotic Interactions : A Study of Phenylpropanoid Metabolites and Gene Expression in the Leaves of Populus tremula

    Författare :Vicki Huizu Decker; Benedicte Riber Albrectsen; George Newcombe; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Populus tremula; condensed tannins; salicinoids; phenolics; genetic variation; soil nitrogen fertilization; herbivory; biology; biologi;

    Sammanfattning : European aspen (Populus tremula) is a fast growing tree species, rich in phenolic compounds. Defense theories suggest that soil nitrogen greatly influence plant allocation togrowth and defense; however, the allocation priorities are not well understood. LÄS MER

  4. 23. Composition of lignin in outer cell-wall layers

    Författare :Maria Christiernin; Gunnar Henriksson; Gösta Brunow; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lignin; thioacidolysis; primary wall; middle lamella; Populus balsamifera; Populus tremula L. x P. tremuloides Michx.; Picea abies; Picea glauca; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : The composition of lignin in the outer cell-wall layers of spruce and poplar has been studied and the data obtained have been compared with those of the mature reference wood in which the secondary cell wall predominates. Materials with exclusively or predominantly outer cell-wall layers were examined. LÄS MER

  5. 24. Molecular control of activity - dormancy transitions in Populus

    Författare :Madeleine Englund; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Perennials such as woody plants, growing in the high northern part of the earth have to cope with seasonal changes alternating between mild summer and the harsh winter periods. To survive and adapt their reproductive phase to the most favorable environmental conditions trees cycle between periods of active growth during summer and a state of growth arrest during winter, referred to as the activity- dormancy cycle. LÄS MER

  7. 25. Establishment and early management of Populus species in southern Sweden

    Författare :Rebecka Mc Carthy; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Populus species are among the most productive tree species in Sweden. Interest in growing them has increased during the 21st century due to political goals to increase the share of renewable energy and to increase the proportion of hardwood species in forests. LÄS MER