Sökning: "soil bacteria"

Visar resultat 16 - 20 av 93 uppsatser innehållade orden soil bacteria.

  1. 16. Frankia – ett släkte kvävefixerande bakterier : Biodiversitet, förekomst i jord och frö, samt påverkan på tillväxt hos havtorn

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Maria Nygren; [2021]
    Nyckelord :Frankia; Sea buckthorn; Nitrogen-fixation;

    Sammanfattning : This study aimed to describe the biodiversity of the nitrogen-fixing symbiotic bacteria Frankia, to investigate the occurrence of Frankia in soil and seeds, and finally test the effect of a Frankia symbiosis on growth rate on Sea buckthorn (Hippophae rhamnoides) in an experiment. Data from the high-quality ribosomal gene database SILVA was used to reconstruct phylogenetic trees that revealed a genetic diversity in the genus that includes more strains than 16 described species so far. LÄS MER

  3. 17. Inhibited surface-thiols in Geobacter sulfurreducens : Mercury uptake and methylation rates

    Master-uppsats, Umeå universitet/Kemiska institutionen

    Författare :Andreas Granström; [2021]
    Nyckelord :;

    Sammanfattning : Due to daily human (anthropogenic) industrial activity, a lot of elemental mercury (Hg0) has been released to the atmosphere. The mercury can then spread globally, since mercury has the ability to remain atmospheric for up to a year. When mercury deposits, it can end up in anaerobic environments such as sediments and soil. LÄS MER

  4. 18. The metagenomes of root nodules in actinorhizal plants : A bioinformatic study of endophytic bacterial communities

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Ellen Fasth; [2021]
    Nyckelord :Actinorhizal plants; Frankia; endosymbiosis; root nodules; metagenomes; bioinformatics;

    Sammanfattning : Actinorhizal plants are in symbiosis with the nitrogen-fixating soil bacterium Frankia, which forms nodules in the plant root. However, several studies also report other endophytic bacteria appearing in the nodules, but their function and interaction with the host plant or Frankia is not yet understood. LÄS MER

  5. 19. Effects of wild boar (Sus scrofa) on soil processes and tree growth

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Andreas Lundgren; [2021]
    Nyckelord :Wild boars; soil processes; tree growth; Vildsvin; markprocesser; trädtillväxt;

    Sammanfattning : Wild boars (Sus scrofa) have increased rapidly in population size and home range since their reintroduction to the Swedish fauna. Through their rooting behaviour, the boars can cause great disturbance to the ecosystem. LÄS MER

  7. 20. Avloppsslam på åkermark : Analys av långsiktiga effekter på mikrobsamhället och kväveomvandlande mikroorganismer

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Elin Malmström; [2020]
    Nyckelord :avloppsslam; nitrifikation; denitrifikation; mikrobsamhälle;

    Sammanfattning : One major environmental challenge is to manage agricultural soil in asustainable way. Since nutrients in the soil are taken away every harvest, there is a need to recycle nutrients back to the soil. One solution is to use sewage sludge as a fertilizer. However, sludge can also contain substances that could potentially be harmful to crops or humans. LÄS MER