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  1. 1. Populus transcriptomics : from noise to biology

    Författare :Andreas Sjödin; Stefan Jansson; Jan Lohmann; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Populus; microarray; transcriptomics; UPSC-BASE; leaf development; Bioinformatics; Bioinformatik;

    Sammanfattning : Mikromatriser handlar numera inte bara om att alstra genuttrycksdata i snabb takt, utan det är minst lika viktigt att effektivt ta hand om informationen efteråt. I den här avhandlingen presenteras ett arbetsflöde för att mäta, lagra och analysera genuttrycksdata i asp och poppel (Populus spp.). LÄS MER

  3. 2. The genomic signatures of adaptive evolution in Populus

    Författare :Jing Wang; Pär Ingvarsson; Barbara Mable; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Populus; adaptive evolution; natural selection; genomic diversity and divergence; recombination; Next-generation sequencing; local adaptation;

    Sammanfattning : Understanding the genetic basis of adaptive evolution, and how natural selection has shaped patterns of polymorphism and divergence within and between species are enduring goals of evolutionary genetics. In this thesis, I used whole genome re-sequencing data to characterize the genomic signatures of natural selection along different evolutionary timescales in three Populus species: Populus tremula, P. LÄS MER

  4. 3. Discovery of fiber-active enzymes in Populus wood

    Författare :Henrik Aspeborg; KTH; []
    Nyckelord :Populus; xylogenesis; secondary cell wall; cellulose; hemicellulose; microarrays; transcript profiling; carbohydrate-active enzyme; glycosyltransferase; glycoside hydrolase;

    Sammanfattning : Renewable fibers produced by forest trees provide excellentraw material of high economic value for industrialapplications. Despite this, the genes and corresponding enzymesinvolved in wood fiber biosynthesis in trees are poorlycharacterized. LÄS MER

  5. 4. Molecular population genetics of inducible defense genes in Populus tremula

    Författare :Carolina Bernhardsson; Stefan Jansson; Santiago González-Martinez; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Populus; herbivore defense; adaptation; population genetics; population structure; association mapping; complex traits; evolutionär genetik; evolutionary genetics;

    Sammanfattning : Plant-herbivore interactions are among the most common of ecological interactions. It is therefore not surprising that plants have evolved multiple mechanisms to defend themselves, using both constitutive chemical and physical barriers and by induced responses which are only expressed after herbivory has occurred. LÄS MER

  7. 5. Cellulose synthases in Populus- identification, expression analyses and in vitro synthesis

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

    Sammanfattning : 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. LÄS MER