Sökning: "herbivory"

Visar resultat 21 - 25 av 33 uppsatser innehållade ordet herbivory.

1. 21. Herbivores, pollinators and selection on flowering time in tetraploid and octoploid Cardamine pratensis

   Master-uppsats, Stockholms universitet/Institutionen för ekologi, miljö och botanik

   Författare :Elsa Fogelström; [2013]
   Nyckelord :Cardamine; herbivory; herbivore mediated selection; pollination; pollen limitation; polyploidy; selection; flowering phenology;

   Sammanfattning : Repeated polyploidization events are thought to be among the most important causes of sympatric speciation throughout evolutionary time. Changes in phenology and trait expressions that arise in polyploids have been shown to affect plant interactions with insect herbivores and pollinators. LÄS MER

3. 22. Priming as a strategy to enhance stress tolerance in plants with focus on the role of Brassinosteroid related genes

   Kandidat-uppsats, SLU/Dept. of Plant Biology and Forest Genetics (until 131231)

   Författare :Malin Thoudal; [2012]
   Nyckelord :Priming; Bacillus amyloliquefaciens ; Arabidopsis thaliana; Brassinosteroids;

   Sammanfattning : It is of interest to gain knowledge of the mechanisms operating behind priming, an important possible strategy to help plants handle stress. The hypothesis is that priming of Arabidopsis thaliana, as a result of colonization of roots using the beneficial bacteria Bacillus amyloliquefaciens, stimulates Brassinosteroid (BR) synthesis in plants leading to plant growth promotion and improved defense responses. LÄS MER

4. 23. Neighbourhood effects as a plant defence against ungulate herbivory

   Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

   Författare :Bregje Koster; [2012]
   Nyckelord :winter browsing; plant-animal interactions; associational effects; scale; large herbivores; palatability; Sweden;

   Sammanfattning : For large herbivores patch selection is highly influenced by the presence of plant species and biomass that allows them the highest protein and energy intake. From the plant point of view browsing is seen as damage and loss of fitness and plants evolved different strategies to avoid or tolerate herbivory. LÄS MER

5. 24. Induced plant volatiles and their effect onSpodoptera littoralis choice of host plant : oviposition on damaged or undamaged cotton or maize

   Magister-uppsats, SLU/Dept. of Plant Protection Biology

   Författare :Thomas Svensson; [2012]
   Nyckelord :Induced plant volatiles; Spodoptera littoralis; oviposition; cotton; maize; induced defence;

   Sammanfattning : Insects are the main pests of many crops despite many different control measures. There is a need for a better understanding of the factors that affect the relationship between insects and plants. It is important to investigate how insects find and choose their host plants. LÄS MER

7. 25. Grazing in the Arctic : can it mitigate the impacts of climate change? : case study: Zackenberg, northeast Greenland

   Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Caroline Jonsson; [2012]
   Nyckelord :Arctic; climate change; warming; grazing; ecosystem responses; muskox; herbivores; grazing optimization hypothesis; CO₂-fluxes; Greenland; Zackenberg; Earth and Environmental Sciences;

   Sammanfattning : Climate change has affected ecosystem structure and composition in the Arctic during the last few decades. Researchers have observed a greening trend as the active layer depth is increasing due to rising air- and soil temperatures. LÄS MER