Sökning: "vacuole"

Visar resultat 11 - 15 av 30 avhandlingar innehållade ordet vacuole.

  1. 11. Role of cadmium and ultraviolet-B radiation in plants, Influence on photosynthesis and element content in two species of Brassicaceae

    Författare :Helene Larsson Jönsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; Plant ecology; UV-B; plant nutrients; photosynthesis; oxygen evolution; chlorophyll fluorescence; Cd uptake; cadmium; Arabidopsis thaliana; Brassica napus; Plant biochemistry; Växtbiokemi; Botany; Botanik;

    Sammanfattning : Plants are exposed to many different stress factors during their lifetime, often more than one factor at a time, which highlights the importance of research regarding interaction among stress factors. Cadmium and ultraviolet-B radiation (UV-B, 280-315 nm) are two potential stress factors in the environment, which have gained increased interest due to atmospheric pollution. LÄS MER

  3. 12. Physiological regulation of the high-affinity phosphate uptake system in the yeast Saccharomyces cerevisiae

    Författare :Johanna Pattison-Granberg; Bengt Persson; Morten Kielland-Brandt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Biokemi;

    Sammanfattning : Yeast cells can be found in a wide variety of environments, demonstrating that these cells are capable of adapting to changes in the external milieu. Inorganic phosphate (Pi) is an essential nutrient for all organisms and Saccharomyces cerevisiae cells take up phosphate from the external environment via two different systems, i.e. LÄS MER

  4. 13. Variable surface molecules of the plasmodium falciparum infected erythrocyte and merozoite

    Författare :Malin Haeggström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :P.falciparum; infected erythrocytes; transport; Maurer s clefts; antigenic variation; PfEMP1; RIFIN; SURFIN; merozoites; subgroups;

    Sammanfattning : As Plasmodium falciparum parasites matures within the infected erythrocyte (IE) it produces a number of various proteins, which are transported out to the cell surface where they are exposed to the host immune system. To avoid recognition and elimination by the liver and spleen these proteins can undergo antigenic variation, a phenomenon where the parasites switch from expressing one variant to' another, both belonging to the same gene-family. LÄS MER

  5. 14. The role of auxin in abscission of organs and tissues

    Författare :Xu Jin; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : 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. LÄS MER

  7. 15. Structure and morphogenesis of the secretory placental cells in Lilium

    Författare :Sangeeta Singh; Eva Robards; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Cells of the ovarian transmitting tissue of Lilium form a secretory epithelium on the placenta. These placental cells have been studied by electron microscopy and confocal scanning microscopy. They follow a basipetal order of maturity. LÄS MER