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 119 for “"Environmental stresses"”.
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Quantifying the Responses of Vegetation to Environmental Stresses
I examined interactions between plants and the environment they live in along the soil-plant-atmospheric continuum and addressed the effects of drought and acid deposition on plant water use. Using a novel stable isotope technique, I showed that plant water source utilization can be modulated in …
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Agronomic Practices to Reduce the Effects of Environmental Stresses on Spring Canola (Brassica napus L.) Establishment and Yield in Ontario
Establishing an adequate plant stand is one of the primary challenges in the production of canola (Brassica napus L.), and plant population strongly affects crop morphology. We tested the hypotheses that i) pre-plant application of liquid dairy manure (LDM) improves crop establishment more than a …
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The role of melanin production in the survival of Vibrio cholerae in the marine environment
… as defense mechanisms against a variety of environmental stresses. This thesis investigated the defensive role of V. cholerae pyomelanin against exogenous stresses, particularly hydrogen-peroxide (H2O2).
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Agronomic, Phenological, and Physiological Responses of Old and Modern Soybean Varieties to Soil Moisture Deficit
… soybean productivity is still often limited by environmental stresses. Because an inverse relationship often exists between seed yield and stress resistance, a two-year study was initiated to examine the responses of two old, low-yielding ('Manchu' and 'Dunfield') and two modern, high-yielding …
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Identification, Characterization, and Abiotic Stress Analysis of microRNAs in Nicotiana tabacum
… signaling, organogenesis, and response to environmental stresses. Based on the conservation of mature miRNA sequences, computational methods have been used to predict thousands of miRNAs in numerous plant species, such as soybean, maize, cotton, potato, rice, apple, and switchgrass. In this …
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Dissection of Drought Responses in Arabidopsis
… as sessile organisms are susceptible to many environmental stresses such as drought, and salinity. They have therefore evolved mechanisms to acclimate and tolerate environmental stresses. Knowledge of the molecular aspects of abiotic stress gleaned from extensive studies in Arabidopsis has …
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Temperature regulation and metabolic rhythms in populations of the house sparrow Passer domesticus
… an attempt to correlate the influences of the environmental stresses of high ambient temperatures and high humidities on selected physiological properties related to temperature regula-tion in the house sparrow, Passer domesticus. Measurements were made of metabolism, evaporative water loss, …
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DRASTIC - INSIGHTS: manipulating gene expression data for formation of hypotheses for plant signal transduction
… together data on plant responses to pathogens, environmental stresses and chemicals from refereed journal publications. Presenting these data in a unified, searchable format allows the user to extract information beyond that obtained by the authors’ single genes, or clusters of similar …
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The mechanisms regulating the transcription factor ATF5 and its function in the integrated stress response
… and gene-specific translation during different environmental stresses. Repressed global translation by eIF2 phosphorylation allows for cells to conserve resources and elicit a program of gene expression to alleviate stress-induced injury. Central to this gene expression program is eIF2 …
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Breeding broccoli resilient to multi-abiotic stresses using genome editing
Broccoli cultivars are sensitive to environmental stresses. Dramatic fluctuation in temperature and other weather conditions caused by climate change has negatively affected the growth and development of broccoli and reduced broccoli productivity and quality. Plant senescence is one of the most …
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The Influence of Flooding on Contributions of Spartina Alterniflora Roots to Salt Marsh Soil Volume in a Field Setting
… regional characteristics in determining environmental stresses and the subsequent impact on root specific gravity. A conceptual model is developed linking the interactions of relevant environmental variables, root specific gravity, and the idea of a stress-tolerance threshold.
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The Role Of Mimosine, A Non-protein Amino Acid In Leucaena Leucocephala Subsp. Glabrata (giant Leucaena)
… of the world. It is highly tolerant to many environmental stresses, including drought, low soil fertility, salinity, acidic and alkaline soils, and disease and pest infestation. The entire plant of giant leucaena contains a non-protein amino acid, called mimosine, which is also toxic to …
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The springshed and potential recharge areas for the Downtown Salado Spring Complex, Salado, Texas.
… experiencing increases in groundwater demand and environmental stresses in response to a growing population. This study delineated the Salado Springshed under baseflow conditions and identified significant recharge zones by analyzing synoptic water-level maps under different aquifer conditions, …
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PD trending and TVA test readings are good indicators of the condition of aged stator bar insulation.
… exposed to thermal, electrical, mechanical and environmental stresses. The complex interactions of these stresses degrade the components resulting in a reduction of useful life. An integral part of satisfactory operation of high voltage (HV) electrical rotating plant relies upon the integrity of …
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The origin and development of sclereids in the leaves of Camellia Reticulata Lindl
… therefore, enabling them to withstand various environmental stresses.</p><p>This paper deals with the foliar sclereid type of sclerenchymatous idioblast. The study of sclereids raises many of the fundamental problems of botany. Some of these are: growth and development, senescence of cells, …
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Retranslocation and volatilization of shoot nitrogen during drought in perennial prairie grasses
… other nutrients in response to drought or other environmental stresses in plants, although such retranslocation, if common, would have important implications for stress physiology and nutrient relations, ecosystem nutrient cycling, and crop, forest, and range management practices. The overall …
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Nitrogen and carbon costs of growth and antioxidant production during acclimation to environmental stress in two species of gethyllis
… species were subjected to drought and shading as environmental stresses and the plant physiological performance was investigated via photosynthetic gas exchange. The third objective of the study was to evaluate the antioxidant content (total polyphenol, flavonol/flavone and flavanone content) and …
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Investigating Non-model Microorganisms for Biomanufacturing via Systems Biology and Machine Learning
… Current models inadequately capture the environmental stresses which contribute to loss of production during scale-up while the physiological responses over the course of long-cultivations in reactors remain poorly understood. This dissertation broadly focused on improving microbial …
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A proteomic investigation of the heat stress response of the South African abalone haliotis midae
… high abalone mortality. There is evidence that environmental stresses on abalone farms may lead to immunosuppression, and thereby increase the severity of disease outbreaks. The water temperature on abalone farms fluctuates seasonally, and increased abalone mortality has been associated with …
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