Search for dissertations about: "fysiologisk botanik"

Showing result 21 - 25 of 90 swedish dissertations containing the words fysiologisk botanik.

  2. 21. The light-harvesting antenna of higher plant photosystem I

    Author : Ulrika Ganeteg; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant physiology; antisense; Arabidopsis thaliana; chlorophyll; fitness; LHC; photosynthesis; Växtfysiologi; Plant physiology; Växtfysiologi;

    Abstract : During photosynthesis, two multi-protein complexes, photosystems (PS) I and II work in tandem to convert the light-energy absorbed by the light-harvesting antennae into chemical energy, which is subsequently used to assimilate atmospheric carbon dioxide into organic carbon compounds. This is the main nutritional basis for life on Earth. READ MORE

  4. 22. Preparation of leaf mitochondria and studies on mitochondrial photorespiratory reactions

    Author : Per Gardeström; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; leaf mitochondria; photorespiration; aqueous two-phase system; Percoli gradient; cytochromes; glycine decarboyxlase; serine hydroxymethyltransferase; inhitors of photorespiration;

    Abstract : A procedure for the preparation of spinach leaf mitochondria was developed. The procedure combines differential centrifugation, partition in dextran- polyethyleneglycol two-phase system and Percoli density gradient centri- fugation. The different steps separate the material mainly according to size, surface properties and density, respectively. READ MORE

  5. 23. Abiotic stress and plant-microbe interactions in Norway spruce

    Author : Julia Christa Haas; Vaughan Hurry; Nathaniel Street; Torgny Näsholm; Jennifer Baltzer; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Norway spruce; boreal forest; cold; drought; bacteria; fungi; plant-microbe interactions; climate change;

    Abstract : Norway spruce (Picea abies) is a dominant tree species in boreal forests with extensive ecological and economic value. Climate change is threatening these ecosystems, with rising temperatures impacting cold hardening and increasing drought stress in regions experiencing lower precipitation. READ MORE

  6. 24. Nitrogen fixation in the lichen Stereocaulon paschale

    Author : Kerstin Huss-Danell; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nitrogen fixation; lichen; acetylene reduction; environmental factors; physiological condition; pine forest; Sweden;

    Abstract : The thesis is a summary and discussion of six papers.The purpose of the investigation was to study the influence of (i) environmental factors and (ii) the physiological condition of the thallus on nitrogen fixation in the lichen Stereocaulon paschale (L.) Fr. READ MORE

  7. 25. The circadian clock in annuals and perennials : coordination of Growth with Environmental Rhythms

    Author : Mikael Johansson; Maria E. Eriksson; Paul Devlin; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; circadian clock; arabidopsis; populus; Molecular biology; Molekylärbiologi; Plant biotechnology; Växtbioteknik; Plant physiology; Växtfysiologi; molekylärbiologi; Molecular Biology;

    Abstract : Since the first signs of life on planet earth, organisms have had to adapt to the daily changes between light and dark, and high and low temperatures. This has led to the evolution of an endogenous time keeper, known as the circadian clock. READ MORE