Browsing Doctoral Theses / Doktorsavhandlingar Institutionen för biologi och miljövetenskap by Title
Now showing items 63-82 of 109
-
Molecular mechanisms optimizing photosynthesis during high light stress in plants
(2014-04-04)ABSTRACT: Oxygenic photosynthesis is the process by which plants, algae and cyanobacteria usesolar energy to convert water and carbon dioxide into molecular oxygen and carbohydrates.Photosynthesis sustains life on Earth ... -
Molecular Systematics of Limnodrilus (Annelida, Clitellata)
(2017-02-27)The freshwater Limnodrilus worms (Clitellata: Naididae: Tubificinae) are segmented hermaphroditic annelids, bearing a unique clitellum (“girdle”) during sexual maturity. Some abundant and common taxa of Limnodrilus are ... -
Morphological and chemical leaf traits of tropical montane tree species and their responses to warming
(2023-10-26)Leaf morphological and chemical traits of tropical trees vary along climate gradients, but it is currently unclear how they will respond to a rapidly warming climate and how this will vary among species. Considering this, ... -
Mutagenesis and transcriptome mapping in oat and characterization of high β-glucan lines
(2013-04-25)Oat (Avena sativa) is a hexaploid crop that is cultivated in Europe, North America, Russia, Australia and northern China. During recent years, oat has seen increased interest due to its potential as a functional food crop. ... -
Mutagenesis in wheat: An approach to make saline green!
(2022-04-01)The raising salinity in the soils around the world have been widely studied during the last decades due to the massive loss in agricultural land. Today, nearly 8% of the world’s arable land can no longer be used for crop ... -
Next-generation Molecular Systematics and Evolution: insights into Medicago
(2015-04-29)Evolutionary relationships among species have in recent years been inferred using DNA sequences from specific genes and represented by tree diagrams (phylogenies). However, the signal contained in different genes can produce ... -
Novel Marine Ingredients for Aquaculture - Fish Nutrition, Physiology and Intestinal Health
(2023-10-24)Aquaculture is among the fastest growing food production sectors globally and supplies more fish to the growing human population than capture fisheries. One of the major challenges in salmonid aquaculture is to find ... -
On the Efficacy and Ecotoxicity of Antifouling Biocides Lethal and Sublethal Effects on Target and Non-target Organisms
(2013-10-23)From an environmental perspective, there is a need to reduce the amount of biocides from antifouling paints in the marine ecosystem as these biocides can exert a negative effect on the marine life. One way to do this is ... -
Origin, evolution and biodiversity of the Neotropical herpetofauna: patterns and processes of the world’s richest and most threatened biota
(2019-09-16)The biological diversity of tropical America (the Neotropics) is astonishing. However, even among terrestrial vertebrates, most biogeographical patterns are not fully described nor understood, especially for many Neotropical ... -
Parasite host interaction between the freshwater pearl mussel (Margaritifera margaritifera) and brown trout (Salmo trutta) – the impact from glochidia larvae on the host
(2022-02-17)Parasites can modulate the physiology and behavior of the hosts to enhance their chances to complete their life cycle. The numerous freshwater bivalves of the order Unionoida all have a parasitic larval stage, also known ... -
Paternal care and brood reduction in a pipefish
(2012-11-01)From an evolutionary and adaptive perspective, the occurrence and extent of parental care in animals (investment in offspring beyond the genetic contribution) is expected to depend on an optimal (fitness-maximizing) balance ... -
Patterns of evolution in a young species, the Baltic seaweed Fucus radicans
(2015-04-29)To be able to interpret patterns of biodiversity it is important to understand the processes by which new species evolve and how closely related species remain reproductively isolated and ecologically differentiated. This ... -
Phenotypic Plasticity and Adaptation Potential to Salinity in Early Life Stages of the Tunicate, Ciona intestinalis spB
(2014-04-08)Species respond to environmental heterogeneity through a variety of mechanisms such as plasticity, genetic adaptation and phenotypic buffering. Determining how gene flow, scale of environmental heterogeneity and trait ... -
Phylogenetic Inference and Allopolyploid Speciation - A Study of Silene section Physolychnis
(2012-08-31)The major theme of this thesis is allopolyploidization, with focus on Silene section Physolychnis. The evolutionary history of an allopolyploid species can be established by inferring the sister relationships of the ... -
Phylogenetic Relationships, Biogeography and Species Delimitation: A case study on southern African Silene (Caryophyllaceae)
(2023-09-20)The primary aim of this thesis was to explore the phylogenetic relationships and historical biogeography of African members of the plant genus Silene (Caryophyllaceae), with special focus on the eight native southern African ... -
Plant Oxylipins and Lipid Transfer Proteins in Defense
(2017-10-20)Oxylipins, the oxygenated metabolites of polyunsaturated fatty acids (PUFAs), are found in many eukaryotic organisms. In plants, several enzymes can produce different types of oxylipins, and the chloroplast structural ... -
Plant pathogen defense: Signalling, resistance and cell death
(2015-03-31)Pathogenic microorganisms are present everywhere in nature and infect both animals and plants. Phytopathogenic microorganisms cause diseases on plants, and are responsible for crop loss amounting in the order billions of ... -
Plant Species Composition and Diversity in Cliff and Mountain Ecosystems
(2012-09-12)Ecosystems today are under increasing pressure from a rapidly changing climate, changes in land-use, habitat fragmentation and degradation and increasing anthropogenic disturbance. Studying drivers of biodiversity patterns ... -
Plastidial phosphate transport in plants
(2014-10-24)Phosphorus is an essential element for all living organisms and is central to the genetics and energetics of life. Inorganic phosphate (Pi) is recurrently involved in protein regulation and signal transduction but also in ... -
Polyploid Phylogenetics in Plants: Insights on non-model organisms in Fabaceae and Malvaceae
(2019-05-02)Genome duplication is a common phenomenon in angiosperms and advances in sequencing technologies and bioinformatics is now revealing its prevalence and significance. In a polyploidization event all genes in a genome are ...