Sökning: "Seed size"
Visar resultat 21 - 25 av 82 avhandlingar innehållade orden Seed size.
21. Sexual conflict and selection on pistil and pollen traits
Sammanfattning : The incidence of sexual selection in plants is today acknowledged, however, just as in animals, evolution and maintenance of mate choice is gravely underexplored. Moreover, the potential for sexual conflicts to occur in plants has only been assessed empirically to a very limited degree. LÄS MER
22. Shape Control Synthesis and Microstructure Studies of Metal Nanoparticles
Sammanfattning : Metal nanoparticles have been extensively studied in recent years due to their unique chemical, biological and physical properties. Gold (Au) and palladium (Pd) nanoparticles are two of the most popular materials because Au nanoparticles have a strong localized surface plasmon resonance effect and Pd nanoparticles have high hydrogen adsorption and chemical catalytic capacities. LÄS MER
23. Improved seed handling techniques for Juniperus polycarpos : implications for active restoration of degraded Juniper forests in Iran
Sammanfattning : Juniperus polycarpos (K. Koch) is one of six native juniper forest tree species in Iran whose population size is declining continuously. The ultimate aim of the research presented in this thesis was to increase the regeneration potential of J. LÄS MER
24. Pollination processes - maternal and offspring performance
Sammanfattning : Pollination is one of the most important factors determining the reproductive success of plants. This thesis examines processes associated to varying pollination, with focus on plant responses. The first aim was to examine the possibility and constraints for short-term evolution of flower size in Raphanus raphanistrum. LÄS MER
25. Forest restoration using direct seeding of oak – Odor cues from predators as a seed protection strategy against foraging rodents
Sammanfattning : In forest restoration of oak, planting nursery-growth seedlings is related to high operational costs. One cost-efficient alternative is the application of direct seeding. However, acorn removal by rodents is one of the major drawbacks in its implementation. LÄS MER