Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 141 for “"Populus"”.
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Bioremediation of arsenic and cadmium in a Populus tremula x Populus alba mutant
… ability to stabilize contaminated soils. A novel Populus tremula x Populus alba mutant named fuzzy with an increased trichome density, an elevated growth rate, enhanced pest resistance and a predicted root phenotype was investigated for its ability to tolerate and accumulate arsenic and cadmium in …
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K+-Homöostase und kaliumabhängige Xylogenese in Populus tremula L. x Populus tremuloides Michx
… Aus Holz-Kambium-Bast-Gewebe wurden mit PTK2 (Populus tremula K+ channel 2), KPT1 (K+ channel Populus tremula 1) und PtKUP1 (Populus tremula K+ uptake transporter 1) drei Volllängen putativer Kaliumtransporter isoliert. PTK2 ließ sich anhand der abgeleiteten Aminosäuresequenz der …
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Patterns of Population Structure and Hybridization within and between Populus trichocarpa and Populus balsamifera
The genus Populus consists of many ecologically and economically important forest tree species. Their rapid growth makes them one of the most productive hardwoods growing in temperate latitudes. Populus spp. frequently hybridize where their ranges overlap, and poplar hybrids are the most frequently …
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Water-use efficiency and productivity in native Canadian populations of Populus trichocarpa and Populus balsamifera
… efficiency within four selected populations of Populus trichocarpa and Populus balsamifera (2 provenances each). Each species included both a northern and a southern provenance. Correlations between water-use efficiency, nitrogen-use efficiency, ¹³C/¹²C isotope ratio, stomatal conductance, and …
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Signatures of natural selection and local adaptation in Populus trichocarpa and Populus deltoides along latitudinal clines
… to identify signatures of natural selection in Populus trichocarpa and P. deltoides. Using both frequency spectrum based tests and tests of heterogeneity, I identified genetic variants deviating from selective neutrality. Results reveal that photoreceptors and dormancy regulator genes may have …
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Mechanisms of cadmium tolerance in Populus
… and environmentally friendly characteristics. Populus trees have been extensively studied for their effectiveness in phytoremediation due to their size, productivity, and status as a model organism. My dissertation had the following objectives with the ultimate focus on developing transgenic …
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Evolutionary Genomics of Populus trichocarpa (Western Poplar)
… of demography and selection in the genome of Populus trichocarpa, a riparian deciduous tree species of North America. Specifically, I used a variety of methods to summarize patterns of genetic diversity and population structure in P. trichocarpa, and to reconstruct its demographic history. I …
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Genomics of Climatic Adaptation in Populus Trichocarapa
Temperate tree species exhibit seasonal growth cycling, and the timing of such transition varies with local climate. Under anthropogenic climate change, the local pattern of growth and dormancy in tree populations is expected to become uncoupled with shifting seasonal environmental signals, …
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Colorado cytospora canker complex on Populus tremuloides Michx.
Cytospora canker is a serious fungal disease affecting aspen in natural and commercial forests as well as urban sites. In Colorado the causal organism responsible for this canker disease is typically reported to be Cytospora chrysosperma (Pers.) Fr. However, a thorough understanding of the species …
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Physiology, genetics and genomics of drought adaptation in Populus
As the demand for energy rises, Populus species are increasingly grown as bioenergy crops. Meanwhile, due to global change, predictions indicate that summer droughts will increase in frequency and intensity over Europe. This study was carried out to evaluate the adaptation to drought in Populus, at …
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Improvement of a high throughput method for identification of T-DNA insertion events in an activation-tagged population of Populus tremula x Populus alba.
… T-DNA insertions sites of the activation tagged Populus tremula x Populus alba population generated by the Regan lab. In this thesis, I explore the potential of using a capture-based sequencing method to construct a high-throughput sequencing method that can be used to identify the genomic …
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Analysis of genetic variation in Pediculus humanus and Populus trichocarpa
… humanus corporis and the black cottonwood, Populus trichocarpa. While unrelated, these two organisms each represent a study system with questions that challenge our current understanding of each organism. Body and head lice, while closely related, are thought to be separate species with …
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Heritable Variation in Natural Populations of Populus Deltoides (Bartr.) in Illinois
Made available in DSpace on 2014-12-04T20:17:18Z (GMT). No. of bitstreams: 1 6402904.pdf: 5130563 bytes, checksum: 347d70b257b4cee85b97e2c7d046110e (MD5) Previous issue date: 1963
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Statistical and Gene Regulatory Network Analysis of Monolignol Biosynthetic Genes in Populus trichocarpa.
North Carolina State University Theses Forestry & Environmental Resources.
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Fungal Degradation Properties of Young Small Diameter Genetically Modified Quaking Aspen (Populus tremuloides)
… properties of young transgenic aspen trees (Populus tremuloides). The first study focused on development of methods of decaying small diameter tree samples. The second and third studies focused on the mass loss differences and cellulose and lignin degradation between trees with different …
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Evolutionary and genetic basis of morphological variation in Populus nigra (European black poplar)
… between sites. A previous common garden study of Populus nigra L. showed morphological variation to be highly heritable and significantly differentiated among populations, indicating phenotypic differences may be adaptive.<br/><br/>This project studied the evolutionary processes that have …
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Genomic Selection and Genome-Wide Association Study in Populus trichocarpa and Pinus taeda
… flush, height, and bud set) in a population of Populus trichocarpa and for height, diameter, and stem straightness in Pinus taeda. GEBVs accuracies were estimated using a ridge regression–best linear unbiased prediction (rrBLUP) model, and these accuracies were compared with estimated …
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Characterization of signaling pathways underlying key growth and development processes in Populus trichocarpa
… goals for this dissertation were to manipulate Populus trichocarpa source-sink relationships to optimize this woody crop species for specific agricultural traits such as increased growth rate, stress tolerance and/or improvements in overall biomass accumulation. We targeted specific tissues such …
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The cost of longevity: loss of sexual function in natural clones of Populus tremuloides
… or lateral roots. The focus of this study was Populus tremuloides, trembling aspen, a dioecious tree that reproduces sexually by seed and asexually through lateral roots. Local forest patches in western populations of Populus tremuloides consisted largely of multiple genotypes. Multi-clonal …
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