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 33 for “"leaf development"”.
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Cellular patterns during leaf development
A major problem in developmental biology is to understand how the behaviour of individual cells creates reproducible biological shapes. Moreover, the reproducibility of form also happens at the cellular level and cellular patterns are evident in the temporal as well as the spatial scales. …
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Metabolic interactions in leaf development in Arabidopsis thaliana
… das Frischgewicht der Rosette, um den Parameter „leafing Intensity“ abzuschätzen. Leafing Intensity integrierte Blattanzahl, Blattgröße und gesamtes Rosettenwachstum in einer Reihe von Kompromiss-Interaktionen, die in einem Wachstumsvorteil resultieren, wenn Pflanzen weniger, aber größere Blätter …
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Evolutionary and functional analysis of transcription factors controlling leaf development
… photosynthetic organs of vascular plants, and leaf development is dependent on a proper control of gene expression. Transcription factors (TFs) are global regulators of gene expression that play essential roles in almost all biological processes among eukaryotes. This PhD project focused on the …
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The role of expansin in leaf development: A molecular genetics and AFM approach
Leaf shape formation is a fascinating process involving the coordinated regulation of cell division and cell expansion, which ultimately relies on the control of cell wall expansion. Expansins comprise a large family of cell wall proteins which can non-enzymatically trigger the relaxation of the …
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In vivo 13C stable isotope tracing of single leaf development in the cold
… enable the processing of large numbers of single leaf samples, their preparation and extraction are simplified and optimised. The metabolite profiles of primary metabolites are measured, and a simple relative calculation is done to gain information on carbon allocation from 13C sucrose. This …
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Interactive effects of elevated carbon dioxide concentration with nutrient availability and leaf development on plant carbon metabolism
… on interactions with water, nutrients, and plant developmental processes. The purpose of this thesis is to address fundamental knowledge gaps in understanding plant responses to the interaction between elevated [CO2] with water, nitrogen (N), and leaf developmental programs: (1) determine what is …
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"Determining the Cause of Abnormal Leaf Development ""Leaf Tatters"" on White Oak (Quercus Alba L.), and Northern Red Oak (Quercus Rubra L.)"
… abnormally. This abnormality is referred to as leaf tatters. The cause of tatters has previously been linked to environmental stress, insect feeding, or herbicide drift. We theorized that herbicide drift was the cause of leaf tatters. Container-grown white oak seedlings were exposed to …
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The Role of Tissue Cell Polarity in Monocot Development
… Combinations of different spatial and temporal developmental switches in shape determine final organ shape. In plants shape arises through growth, which is defined by axiality and growth rates. Here I tested three hypotheses for how developmental switches in shape could arise: (1) growth rates …
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Some Effects of Turnip Yellow Mosaic Virus Infection on Nucleic Acid Metabolism in Brassica Pekinensis Rupr.
… virus (TWMV) have been examined in the first leaf to develop systemic symptoms. This leaf was used in an attempt to avoid wounding effects, and its characteristics have been defined to allow infection-induced changes to be related to the stags of leaf development, the time course of infection …
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Developmental and Expression Evolution in C3 and C4 Atriplex and their Hybrids
… C4 photosynthesis. I combined transcriptomic and developmental analyses to investigate the molecular control of leaf development in C3 Atriplex prostrata compared to A. rosea, a C4 species with Kranz anatomy. Plants with Kranz-type C4 photosynthesis have two photosynthetic cell types, mesophyll …
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A comparative study of carnivorous leaves in the genus Sarracenia
… throughout the genus. Four zones of the leaf were examined in four species throughout the range of the genus using scanning electron microscopy (SEM). Nine unique microstructures were identified in the carnivorous leaf. For the first time, microstructures (N=880) were systematically …
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Modeling canopy foliar traits and disturbance interactions in central Texas woodlands.
… with the greater ecosystem at multiple scales. Leaf mass/area ratios, nitrogen, and phosphorus were measured and were shown to correlate with relative light levels in some species. Leaf nutrition is used as the basis for a leaf development model. Leaf mass and leaf area index data are utilized …
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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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Flowering Gene Homologs Regulate Seasonal Growth Changes in Poplar
… and bud set, only FDL3 coordinately altered leaf development and the transition to secondary growth in a photoperiod-dependent manner. For the first time, we demonstrate distinct functions of the two FT paralogs in vegetative phenology. Study of ft1ft2 double mutants and ft1-specific mutants …
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Impact of carbofuran on spring-seeded alfalfa and associated insect pests
… on alfalfa (Medicago sativa L.) growth, potato leafhopper, Empoasea fabae (Harris), and seedcorn maggot, Hylemya platura (Meigen). No increases in radicle length, trifoliate leaf development, or dry matter resulted from carbofuran application to alfalfa seedlings grown in a growth chamber using …
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Evaluation of the antimicrobial activity of Plectranthus amboinicus leaf extracts on planktonic and biofilm forms of Staphylococcus aureus and Pseudomonas aeruginosa
… of Plectranthus amboinicus (Indian borage) leaf extracts was initiated due to the growing global concern of antimicrobial resistance (AMR) and the scarcity of antimicrobial drugs currently in development. Plectranthus amboinicus is known for its antimicrobial properties due to the …
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Role of xanthophyll and water-water cycles in the protection of photosynthetic apparatus in Arbutus unedo and Arabidopsis thaliana
… revealed changes in transcript expression during leaf development consistent with a signalling role of AOS in plant defence responses but no difference was found any in photosynthesis efficiency or in AOS concentration after short-term exposure to excess of light. Environmental stresses such as …
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