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 28 for “"Leaf Morphology"”.
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CHANGES IN LEAF MORPHOLOGY, PHOTOSYNTHESIS AND NITROGEN CONTENT IN TWO COASTAL SHRUBS
… Photosynthesis, incident light, chlorophyll, and leaf C:N ratios were quantified for young, intermediate, and old leaves (distal, central and proximal leaves, respectively). Leaf structural differences were also compared. Leaves did not change morphologically with age. Light decreased with leaf …
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Variations in Phenotypic Plasticity and Fluctuating Asymmetry of Leaf Morphology of Three Quercus (Oak) Species in Response to Environmental Factors
<p>Leaf morphology of <em>Quercus</em> (oak) species is highly variable and complicated confounded with phenotypic plasticity and fluctuating asymmetry (FA). However, the study of variation is mostly limited to leaf morphology. This study was extended to plasticity and FA variations in <em>Q. …
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A phylogenetic and monographic study of Oxypolis, Ptilimnium, and closely related genera (Apiaceae)
… clades that corresponded to differences in leaf morphology within the groups. While most species of Oxypolis and Ptilimnium have compound leaves, others share a unique leaf morphology known as rachis leaves. Rachis leaves are linear, terete, hollow, and septate and are equivalent to the …
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Transcriptomic Insights into the Morphological Variation Present in Bromeliaceae
… reservoirs, and CAM photosynthesis. Based on leaf morphology and arrangement, root type, and nutrient acquisition, Pittendrigh (1948) conservatively separated bromeliads into four main classes. These four main classes are designated Type I bromeliads, Type II bromeliads, Type III bromeliads …
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Characterisation of the AT4G11100 gene, a negative regulator of disease resistance in Arabidopsis thaliana
… AT4G11100 expression levels displayed distinct leaf morphology, possibly implicating AT4G11100 in leaf development.
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Mist interception by three species of mountain fynbos
… size. Interception efficiency depended on the leaf morphology of the plants. Narrow-sclerophylls (e.g. Psoralea pinnata) were found to be more effective in intercepting mist droplets than broad-clerophylls (e.g. Leucadendron salignum). The portioning of intercepted water into plant-drip and …
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Nature based solutions for coastal defense: Wave attenuation and economic analysis of marsh-fronted seawalls
… vegetation drag was modeled using the stem and leaf morphology and material properties of specific marsh species. The model was validated with field wave height data. A benefit-cost analysis framework was used to present an economic argument for hybrid infrastructures. The additional wave …
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The phylogeography of North American chestnuts and chinquapins (Castanea Mill., Fagaceae)
… species has been complicated by intermediate morphology, similarity in growth habit, and putative naturally occurring hybridization where species' ranges overlap in the southeast. The main goals of the present study were to: 1) determine if genetics reflect the morphological variation observed …
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The module mir156/spl affects bixin biosynthesis pathway in annatto (Bixa orellana L.)
… of SPL transcription factors that modulate leaf morphology and anatomy, among other characteristics that may be linked to secondary metabolites production. In this particular, the miR156/SPL module regulates the biosynthesis of sesquiterpenes, flavonoids, anthocyanins, and carotenoids in …
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Functional analysis of novel protein-protein interactions involving ROP GTPases in Arabidopsis thaliana and Populus trichocarpa
… at the base of flower pedicels and altered leaf morphology. Interestingly, the co-expression phenotype could not be observed in transgenic plants that are only expressing either one of the interacting partners separately. Transgenics altered in expression of PB15 and/or PB129 were prepared …
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Evolutionary and genetic basis of morphological variation in Populus nigra (European black poplar)
… In forest trees, intraspecific variation in leaf size, branching architecture, and growth rate among populations are considered adaptive and likely related to climatic differences between sites. A previous common garden study of Populus nigra L. showed morphological variation to be highly …
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Plant morphology and gas exchange in Hesperaloe: Influence on its adaptation for cultivation.
… in H. funifera. In this species a flush of new leaf production (increased sink demand) coincides with the observed increase in photosynthesis during the fall. The late fall peak of CO₂ uptake found in H. funifera could also be caused by a photoperiodic stimulation of CO₂ uptake. Significant …
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Occult moisture inputs in the fynbos : Foliar moisure uptake in Ericaceae, Restionaceae and Proteaceae / Annabelle J. Rogers
… family were able to absorb water through their leaf surfaces, while members of the Proteaceae were unable to do so (Gibson, 2012). Adding to the body of research, this study explores whether foliar uptake occurs in species that do not exist in the cloud belt of the Cape Peninsula and the …
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Potential Impacts of Climate Change on Photochemistry of <i>Zostera Marina</i> L.
… enrichment consistently increased plant size, leaf thickness and chlorophyll use efficiency, and decreased pigment content and the package effect while maintaining similar light harvesting efficiency. These CO<sub>2</sub> responses resembled high light acclimation suggesting a common …
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The effect of habitat structure on reproduction and prey capture of a rare carnivorous plant, Pinguicula lutea
… plant that inhabits fire-dependent longleaf pine savannas of the Southeast US and is listed as threatened in the state of Florida. Based on preliminary studies in 2013, Pinguicula lutea is a self-compatible but outcrossing species. Its primary prey are Collembola and small Diptera. In …
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Systematic studies in the tribe Amaryllideae (Amaryllidaceae)
… of lineage diversification. Data from bulb and leaf morphology, floral anatomy, pollen, external seed morphology and chromosome cytology were analysed cladistically. The strict consensus tree for Amarytlideae provided a template to trace character evolution. The strict consensus trees for …
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High throughput phenotyping and quantitative genetics of leaf functional traits in C4 grasses
… phenotyping (HTP) methods for measuring leaf functional traits need to be evaluated beyond proof-of-concept studies. Chapter 2 and Chapter 3 aimed to understand the scope in which statistical models developed from hyperspectral reflectance measurements could be applied to predict key leaf …
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The growth and productivity of ribes nigrum under various levels of shade and the implications for multifunctional woody polycultures
… overall size similar to the control plants. The leaf morphology and height changes under shading were congruent to previous research on plant plasticity responses to shade stress in plants. The major issues found in the study was an increase in plant injury as shading increased, pointing to a …
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Hydraulic trait variation in Protea repens with change in climate in space and time
… I explore variation in the hydraulic traits (leaf and xylem anatomy) of Protea repens (L.) across a spatial climatic gradient in the CFR relative to a common garden experiment. I then compare the contemporary trait-climate relationships with a 21 year old xylem anatomy dataset. In the common …
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Prediction, validation and functional analysis of miRNA targets in Arabidopsis thaliana
… overexpressing plants several defects in leaf morphology were observed and the number of leaves was altered drastically. Nevertheless, plants overexpressing wild-type MYB101 showed similar, but weaker phenotypes. MRG1 protein, expressed as fusion protein with GFP, was localized in the …
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