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 12 of 12 for “"gymnosperm"”.
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Sequence capture as a tool to understand the genomic basis for adaptation in angiosperm and gymnosperm trees
Forest trees represent a unique group of organisms combined with ecological and economic importance. Owing to their random mating system and widespread geographical distribution, they harbor abundance genetic variation both within and among populations. Despite their importance, research in forest …
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Diversity and Evolution of Short Interspersed Nuclear Elements (SINEs) in Angiosperm and Gymnosperm Species and their Application as molecular Markers for Genotyping
… PinS-II – PinS-VI) were detected in the gymnosperm species Larix decidua. Compared to the SaliS and PoaS families, structural relationships are less frequent within the TheaS families and absent in the PinS families. The ISAP analysis revealed the genetic identity of Europe’s oldest …
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Relationship of Tecate Cypress Distribution to Soil Types
… Tecate Cypress (Cupressus forbesii Jeps.) is a gymnosperm tree of limited distribution. To determine if soil is an influencing factor in its distribution, the soil characteristics of a Tecate Cypress grove in the Santa Ana Mountains of Orange County, California, were compared with soils from …
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Characterization of Sentinel Butte Petrified Wood and Host Lithology Associations
… parent tree type, which was determined to be a gymnosperm. Silica phases involved in the petrification, include microcrystalline quartz (chert), fibrous chalcedony and megaquartz. Silica fills tracheids and also pervasively replaces organic material. Permineralization is the dominant mode of …
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The largest subunit of RNA polymerase II (rpb1) as a phylogenetic marker of seed plant species
… rpb1 genes from twenty-six land plant species (8 gymnosperm species, 17 angiosperm species and Psilotum, a fernally, as the outgroup). The sixteen rpb1 genes which were sequenced in this study had very similar lengths and contained no base compositional bias. Synonymous substitutions of rpb1 …
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Identification and characterization of a matrix metalloproteinase (Pta1-MMP) expressed during Loblolly pine (Pinus taeda) seed development and germination
… this is the first report of an MMP in any gymnosperm and also its involvement in embryo development and subsequent germination.
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Exploring high-resolution carbon isotopes in archaeological charcoal as a rainfall seasonality proxy
… Proteaceae (angiosperm) and Podocarpaceae (gymnosperm) charcoal. Modern Protea and Podocarpus wood and charcoal samples from all three rainfall zones are tested to assess the SPP's applicability in South Africa and its ability to extract seasonal climate data from different materials. …
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Development of Fluidic Systems for Water Filtration and Bio-Separation
… focus on the characterization and engineering of gymnosperm xylem for developing water filters. The xylem tissue, which transports water and nutrients in plants, has nanoscale pores that can remove contaminants from water. However, xylem’s functional attributes as a water filter, such as flow …
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Systematics and Ecology of Truffles (Tuber)
… Pacific Northwest and associated primarily with Gymnosperms. Chapter 4 is a meta-analysis of all known Tuber ITS rDNA sequences (e.g. from Genbank and generated from herbarium collections) available at the time. These were placed within the Tuber phylogeny to assess species diversity, …
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Palynology, palynofacies and hydrocarbon potential of the Cretaceous rocks of northern Egypt
… largely defined by first occurrences of spores, gymnosperm<br/>and angiosperm pollen and dinoflagellate cysts. Three new palynostratigraphically<br/>defined age divisions are described for the lower part of the Abu Tunis 1x<br/>succession, and a more refined biostratigraphy is made for the upper …
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Araucaria in the Urban Landscape: A Novel Leaning Pattern and Evidence of Cultivated Hybridization
<p>Our understanding of the natural world is constantly evolving and strengthening as more observations are made and experiments are performed. For example, we understand that tree stems grow toward the light (positive phototropism; Darwin 1880, Loehle 1986, Christie et al. 2013) and against …