Sökning: "phytochrome"

Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet phytochrome.

  1. 1. Shedding Light on Shade- and Dark-Induced Leaf Senescence

    Författare :Bastiaan Brouwer; Per Gardeström; Karin Krupinska; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis; darkness; light; photosynthesis; phytochrome; shade; senescence;

    Sammanfattning : Leaf senescence is the final stage of leaf development, during which the leaf relocates most of itsvaluable nutrients to developing or storing parts of the plant. As this process progresses, leaves losetheir green color and their capacity to perform photosynthesis. LÄS MER

  3. 2. Signal Transduction in Photoreceptor Proteins : Insights From Time-Resolved X-ray Solution Scattering

    Författare :Oskar Berntsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Signal transduction; Photoreceptor; Time-resolved X-ray solution scattering; Protein dynamics; Phytochrome; Light-oxygen-voltage; Cryptochrome;

    Sammanfattning : The ability to sense and react to different light conditions is of great importance for many organisms on the face of the earth. Specialized proteins known as photoreceptor proteins provide bacteria, plants and animals with this ability. LÄS MER

  4. 3. Theoretical Photochemistry : Halogenated Arenes, Phytochromobilin, Ru(II)polypyridyl complexes and 6-4 photoadducts

    Författare :Anders Borg; Sten Lunell; Hans Karlsson; Luis Serrano-Andrés; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; Quantum Chemistry; Halogenated Arenes; Phytochromobilin; Phytochrome; Ruthenium; 6-4 photoadducts; Photochemistry; Kvantkemi; Quantum chemistry; Kvantkemi;

    Sammanfattning : This thesis presents Quantum Chemical calculations on the Photochemistry of Halogenated benzenes, Phytochromobilin, Ruthenium Polypyridyl complexes and 6-4 photoadducts in DNA. The work is focused on improving the understanding of a number of experimentally observed photochemical processes in these systems. LÄS MER

  5. 4. Structural characterization of Deinococcus radiodurans phytochrome in solution

    Författare :Lidija Vrhovac; Sebastian Westenhoff; Vladislav Orekhov; Magnus Wolf-Watz; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Biokemi; Biochemistry;

    Sammanfattning : Phytochromes are red/far-red photoreceptors which control a wide spectrum of biological processes inplants, fungi, and bacteria. Although phytochromes have been extensively studied, their mechanism ofaction still remains elusive. The signaling mechanism suggested by crystal structures involves refoldingof the so-called PHY tongue. LÄS MER

  7. 5. Photochemical properties of phytochrome and firefly luciferase chromophores: A theoretical study

    Författare :Olle Falklöf; Bo Durbeej; Patrick Norman; Marcus Lundberg; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This licentiate thesis presents computational chemistry studies on photochemical properties of phytochrome and firefly luciferase chromophores.Phytochromes are bilin-containing proteins that based on the ambient light environment regulate a number of physiological and developmental processes in bacteria, cyanobacteria, fungi and plants. LÄS MER