Sökning: "light stress"

Visar resultat 1 - 5 av 310 avhandlingar innehållade orden light stress.

  1. 1. Light, stress and herbivory : from photoprotection to trophic interactions using Arabidopsis thaliana as a model organism

    Författare :Martin Frenkel; Jon Moen; Stefan Jansson; Don Cipollini; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis thaliana; photoprotection; herbivory; light-stress; jasmonate; fitness; FDE; dual-choice; Biology; Biologi;

    Sammanfattning : Photosynthesis is the most important process for nearly all life on earth. Photosynthetic organisms capture and transfer light energy from the sun into chemical energy which in turn provides a resource base for heterotrophic organisms. Natural light regimes are irregular and vary over magnitudes. LÄS MER

  3. 2. Stress and the Offspring : Adaptive Transgenerational Effects of Unpredictability on Behaviour and Gene Expression in Chickens (Gallus gallus)

    Författare :Daniel Nätt; Per Jensen; Berry Spruijt; Linköpings universitet; []
    Nyckelord :Chicken; Red junglefowl; Domestication; Epigenetics; Transgenerational; Inheritance; Gene expression; Microarray; qRT-PCR; Immunogenetics; Immunoglobulin; Estradiol; Steriod hormones; Prenatal stress; Epigenetic inheritance; Adaptation; Stress; Behaviour; Ethology of domestic animals; Husdjurens etologi;

    Sammanfattning : Environmental stress has shown to affect both the exposed individuals and the development of their offspring. Generally, it is thought that the stressed organism responds to stress by trying to adapt to it. LÄS MER

  4. 3. Coping with Stress : Regulation of the Caulobacter crescentus cell cycle in response to environmental cues

    Författare :Kristina Heinrich; Kristina Jonas; Emanuele Biondi; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Caulobacter crescentus; bacteria; cell cycle; stress; filamentation; cell morphology; DNA replication; cell division; molekylär biovetenskap; Molecular Bioscience;

    Sammanfattning : All organisms have to respond to environmental changes to maintain cellular and genome integrity. In particular, unicellular organisms like bacteria must be able to analyze their surroundings and rapidly adjust their growth mode and cell cycle program in response to environmental changes, such as changes in nutrient availability, temperature, osmolarity, or pH. LÄS MER

  5. 4. Coordination of two different genomes in response to light and stress

    Författare :Louise Norén Lindbäck; Åsa Strand; Antony Dodd; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis thaliana; chloroplast; cellular communication; tetrapyrrole; circadian clock; oxidative stress; light signalling; gene regulation; molekylärbiologi; Molecular Biology;

    Sammanfattning : About 1.5 billion years ago, a photosynthetic bacteria was engulfed by a eukaryotic cell which initiated a symbiotic relationship and the evolution of the chloroplast as we know it today. The chloroplast has retained its own genome encoding for a number of proteins required for the function of the chloroplast. LÄS MER

  7. 5. Biotic and abiotic stress in microorganisms and plants: Some Mechanisms of Stress and Programmed Cell Death. Genetic Engineering Approaches Towards Improved Stress Tolerance

    Författare :Per-Johan Meijer; Tillämpad biokemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biotic stress; plants; microorganisms; stress tolerance; antifreeze protein; proline; programmed cell death; systemic aquired resistance; Biochemistry; metabolism; Biokemi; Bioteknik; Biotechnology; abiotic stress;

    Sammanfattning : Various forms of stress, such as biotic and abiotic stress, were studied in microorganisms and plants to learn more about the underlying mechanisms of such stress and potential genetic engineering strategies towards stress tolerance. An antifreeze protein from winter flounder, expressed in E. LÄS MER