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 39 for “"within-plant"”.
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Factors Affecting Within-plant Variation of Cotton Fiber Quality and Yield
… variation, 3) Determine the significance of within-plant yield variation, and 4) Determine the significance of within-plant quality variation. Small differences in micronaire are often indistinguishable, making breeding efforts difficult. With new instruments, selecting for the components of …
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Phenology of the European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae) in Virginia
… is reported. The seasonal abundance, within - field and within - plant distribution of first generation European corn borer egg masses were observed in field corn in Bedford County, Virginia. Peak egg mass abundance occurred ca. 200 degree days after the first borer moths were taken in …
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The combined effects of airflow and carbon dioxide on chrysanthemum, dwarf wheat, and soybean
Effects of airflow direction and velocity on plant vegetative production were studied. Three plant species were studied: dwarf wheat (Triticum aestivum), chrysanthemum (Chrysanthemum morifolium), and soybean (Glycine max. L.). Specific objectives of this research were to: (1) Evaluate and improve …
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Vanadium uptake and transport in higher plants
… and transport of vanadium in several higher plant species has been examined. Studies utilizing excised Hordeum roots have revealed the uptake patterns of two different ionic species of vanadium (V02+ and V03) to be similar. Both ionic forms exhibited a large extracellular component in their …
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Distinct C-terminal Amino Acid Sequence Motifs Serve as the Targeting Signals for Outer Mitochondrial Membrane and Plastid Outer Envelope TA Proteins
… how these proteins are properly partitioned within plant cells, mostly because so few plant TA proteins have been identified. Here we show the results of experiments aimed at cataloguing, in silico, all of the TA outer mitochondrial membrane and plastid outer envelope proteins in Arabidopsis …
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The Nature of Selection on Flowering Time: Integrating Fitness Contributions through Male and Female Function
… to fitness. Most work towards this goal in plant systems has addressed the female component of fitness only. This thesis investigates the nature of selection on the timing of flowering onset - a trait of practical and theoretical importance - with equal emphasis on female and male function. …
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IMPROVING CANNABIS SATIVA'S PHYTOREMEDIATION CAPABILITIES OF FOREVER CHEMICALS THROUGH MICROBIAL INOCULATIONS
… strategy for mitigating PFAS contamination, and plant-microbe interactions may influence contaminant uptake and transport within plant systems. These studies investigated microbial inoculation methods and examined whether Bacillus subtilis could influence the uptake and distribution of …
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The Preparation and Properties of Silicon-Carbohydrate Compounds
Silicon is widely distributed in plant and animal organisms and it has been reasonably well established that the element is structurally bound in biopolymers such as pectin. However, the major problem in studying the biological role of silicon is that virtually nothing is known of how silicon is …
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Factors affecting the population dynamics of the green peach aphid, Myzus persicae (Sulzer), on flue-cured tobacco in Virginia
… it becomes increasingly more randomly dispersed within the field. The typical pattern of temporal development of GPA was a bimodal distribution with the greater proportion of individuals occurring after topping of the crop. Cumulative proportional population growth models using degree-days were …
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Arabinoglucuronoxylan and Arabinoxylan Adsorption onto Regenerated Cellulose Films
… into the assembly and disassembly of polymers within plant cell walls. Cellulose thin films are useful in the study of interactions between cellulose and hemicelluloses, and quartz crystal microbalances with dissipation monitoring (QCM-D), surface plasmon resonance (SPR) and atomic force …
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Effects of exogenous and endogenous factors on appetite regulation in broiler chicks and Japanese quail
… of ferulic acid (FA), an exogenous factor found within plant cells, and oxyntomodulin (OXM), an endogenous hormone generated in the gastrointestinal tract, on food intake in avian models, as well as elucidate the hypothalamic mechanisms responsible. In broiler chicks (Gallus gallus), FA …
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Endophytic Actinomycetes as potential agents to control common scab of potatoes
… have indicated their ability to combat plant diseases. Some <em>Streptomyces</em> species colonize within plant tissues without causing disease symptoms (endophytes). This research sought for the presence of endophytic <em>Steptomyces</em> or closely related species in potato plants that …
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The role of RTNLB3 in endoplasmic reticulum structure and cytokinesis in planta
… that are ubiquitous to eukaryotic cells. Plants possess the highest number of different reticulon proteins, which contain a conserved reticulon homology domain that has been associated with their ER curvature inducing properties. Individual reticulon family members are suspected to play …
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AY-‐WB phytoplasma manipulations of host and non-‐host leafhopper interactions
Hempitera. In plant hosts, phytoplasmas induce physiological changes and in both hosts modulate plant-‐insect interactions. Previously, interactions have been examined with both hosts infected with phytoplasmas. Thus, it is unclear which organism the effect stems from or how phytoplasmas …
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Potential of Pandora neoaphidis (Remaudière & Hennebert) Humber as a fungal pathogen for the control of tobacco aphid, Myzus nicotianae Blackman, on tobacco
… aphid on tobacco and non solanaceous host plants, within plant distribution of the pathogen in aphids on tobacco, influence of tobacco cultivars and cultural practices on the incidence of the pathogen, methods of artificially introducing the pathogen into tobacco aphid populations and their …
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The Consequences of Plant Anatomy on Viral Co-Infection
Plant viruses are infectious agents that exploit plants to survive, transmitted from host to host primarily by insect vectors. Within plant hosts, viral populations encounter both physical and physiological barriers that may influence their evolution. This work aims to identify opportunities during …
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Design and Application of Probes of Novel Bioactivities
… are well established the use of plant biocatalysts is relatively unexplored. Since the plant kingdom contains a greater diversity of potential biocatalysts this represents an untapped resource. Two simple plant enzyme systems were investigated: AtSFGH and AtCXE12. A series of …
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Quantification of tobacco aphid, Myzus nicotianae Blackman, injury to flue-cured tobacco, Nicotiana tabacum (L.)
… aphid-days. Aphid populations and tobacco plant responses were recorded on an individual plant basis. A gradient in cumulative aphid-days was obtained through the use of temporally distributed aphid colonizations and selective insecticide use. Tobacco aphid populations resulted in yield …
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Population of Gladioulus imbricatus under diverse management regimes in SW Estonia
… Gladiolus imbricatus is an endangered species within plant communities of semi-natural grasslands. Coastal meadows, extensively managed as pastures or meadows, are amongst its favored habitats and thrive with biodiversity in fauna and flora. However, following major land-use changes during the …
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Multitrophic Interactions in a Prairie Insect Community: Ecology, Behavior, and Conservation
… of their original pre-settlement area. The plant communities of this ecosystem are relatively well known and appreciated, but little is known of the biology of most insects that are endemic to prairie ecosystems of North America, with the exception of large and conspicuous species. In …
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