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 21 for “""Stomata research""”.
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Design of a microscopy-based screening method for stomatal development genes in <i>arabidopsis thaliana</i>
<p>Stomata are microscopic pores in the epidermis of plants that regulate gas exchange and transpiration. Regulation of stomatal behavior offers opportunity for crop improvement; stomata are also useful for research into cell patterning, differentiation, and development. The purpose of this project …
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Spatial and temporal variation in stomatal response to climate: a case study of modern and herbarium samples of Salix
… carbon dioxide (CO₂) levels and climate with the stomatal abundance of Salix cinerea (Grey Willow). There are three principle objectives of this research:1. Develop a methodology for obtaining S. cinerea stomatal countsa. In terms of leaf preparationb. In terms of checking for effects of …
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Major transitions in the plant tree of life: insights from genes, genomes and traits
… terrestrialisation and the origin of stomata, roots and seeds. These events have been accompanied by the gain, loss, expansion and contraction of gene families. Genome sequencing has increased the potential insights from evolutionary analyses which includes comparative genomics, gene …
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A putative approach for influencing stomatal density by over-expressing NADP-dependent malic enzyme in arabidopsis
<p>Stomata are leaf structures critical for plant survival because they modulate the rate of transpiration. This study will examine a possible mode for regulating stomatal density by over-expressing NADP-dependent malic enzyme (NADP-ME), which is thought to deplete the counter-anion pool in …
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Evaluation of Downy Mildew (Peronospora farinosa f.sp. chenopodii) Resistance among Quinoa Genotypes and Investigation of P. farinosa Growth using Scanning Electron Microscopy
… (SEM) also revealed that P. farinosa penetrated stomata via appressoria, secreted extracellular matrices during sporangia germination, grew intercellularly in leaf and petiole tissues, and exited leaf tissue through stomata. Future research requiring knowledge of resistant quinoa genotypes, P. …
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Dynamics of soybean leaf hydraulic conductance and diurnal soybean transcriptome analysis
… a constant flow of water through the leaf if stomata are to remain open for CO2 acquisition during the day. Thus, leaf hydraulic conductance (Kleaf), a measure of the leaf’s capacity to transport water to the sites of evaporation within the leaf, is closely linked and potentially limiting to …
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Effects of deficit irrigation frequency on plant growth, water use and physiology of Pelargonium x hortorum and tomato (Solanum lycopersicum L. cv. Ailsa Craig)
… to WW plants. From a physiological perspective, stomatal conductance (gs) decreased similarly under both FDI and IDI, but there were treatment differences in leaf water potential (Ψleaf). FDI resulted in a more positive Ψleaf compared to WW plants, whilst Ψleaf under IDI was typically the lowest. …
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Investigating variation in the response of photosynthetic traits to ozone pollution in maize
… for ozone tolerance. Ozone enters plants through stomata, reacts to form reactive oxygen species in the apoplast, and ultimately decreases photosynthetic carbon gain. Free Air Concentration Enrichment (FACE) technology is for essential evaluating the photosynthetic response of maize to elevated …
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The Role of G-Protein Signaling in Pathogenesis in Cercospora zeae-maydis
… C. zeae-maydis orients hyphal growth towards stomata (stomatal tropism) and forms infectious structures (appressoria) that are necessary for successful infection. Although some genes involved in pathogenesis in C. zeae-maydis have been identified, the molecular mechanisms are not well …
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Ecophysiology of Barrier Island Beach Plants: Responses in Form and Function to Daily, Seasonal and Episodic Stresses
… studies for greater than one-hundred years. This research has provided a general understanding of how BI beach plants and their environment interact and affect one another. Unfortunately, research on the physiological ecology of BI beach plants is essentially nonexistent, with the exception of …
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Structural and functional characterization of a Xanthomonas Type III effector
… such as Burkholderia and Acidovorax. In this research, we studied the protein structure of AvrRxo1 and illustrated its virulence mechanism.We determined the three-dimensional structure of the complex of AvrRxo1 and its cognate chaperone Arc1 (AvrRxo1 required chaperone 1). The AvrRxo1: Arc1 …
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White apple leafhopper affects apple fruit quality and leaf gas exchange
… were located in areas of the leaf with high stomatal density, and were therefore in close proximity to stomata. Groups of cells in the palisade layers were empty, or contained coagulated cell contents; adjacent palisade cells were apparently uninjured. These uninjured cells contained an …
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THE FEEDBACK BETWEEN CELL SHAPE AND CYTOSKELETAL DYNAMICS ON CELL DIVISION AND EXPANSION IN EPIDERMAL PAVEMENT CELLS OF ARABIDOPSIS
… cells form unique lobed shapes over time, while stomata, composed of guard cells, are identical in size and shape. Both cell types emerge from the same precursor cells and are produced through highly regulated divisions based on the morphology of the parent cell. Specifically, asymmetric …
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GABA regulation of gas exchange in barley (Hordeum vulgare)
Stomatal guard cells are the primary gatekeepers for gas exchange between plants and the atmosphere, and therefore, modulate the rate of photosynthesis (i.e. plant energy production) and transpiration (i.e. plant water loss). It is well known that carbon gain and water loss through stomatal …
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Drought tolerance and implications for vegetation-climate interactions in the Amazon forest
… by savanna by 2050. The main questions of this research are: What factors affect forest drought tolerance, and what are the implications of drought tolerance mechanisms for climate? Forest adaptations to drought, such as development of deep roots, enable Amazon forests to withstand seasonal …
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DEVELOPMENT AND APPLICATIONS OF SCANNING ELECTROCHEMICAL MICROSCOPY (SECM)
… the SECM technique should be beneficial to many research areas. For the first time, a new SECM has been built with a 3D closed-loop positioning system. Its operation parameters were optimized by testing several samples with known surface structures, such as Pt and Au interdigitated electrode …
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Near-surface Atmospheric Response to Simulated Changes in Land-cover Vegetation Fraction, and Soil Moisture over Western Kentucky
… developed by the National Center for Atmospheric Research (NCAR) and the Pennsylvania State University (PSU) MM5 coupled with an intermediately complex land surface model (LSM) Noah was used. The purpose of this research is to investigate the impact of multiple types of LULCC on planetary boundary …
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Morphological and Physiological Responses of Senegalia senegal (L.) Britton Provenances to Drought, Salinity, and Fertility
… of chapter 3 revealed that Ngane has larger stomata with low density in comparison with Diamenar and Kidira provenances. With the exception of Ng21B1, all seed sources displayed similar adaptations to salt stress in term of biomass accumulation. Fertilizer increased total biomass of all seed …
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Top-down or bottom-up?: Impacts of giraffe browse and water abstraction on two keystone tree species of the Kgalagadi Transfrontier Park
… between the wet and dry season by closing their stomata but are prone to drought-induced carbon starvation, specifically for trees in the Nossob. Overall, my results show that the impact of giraffe on vegetation structure is already evident for A. haematoxylon, indicative of future negative …
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Cytogenetics and genome structure in genus Miscanthus, a potential source of bioenergy feedstocks
… ornamental accessions by private nurseries and research institutes. Comprehensive taxonomic studes have not been conducted on these U.S. accessions. Previous taxonomic studies have been conducted on the genus Miscanthus using morphology and DNA sequence variation. This study (chaper 2) combines …
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