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Full-Text Articles in Life Sciences

Determination And Quantification Of Surface Lipid Metabolites In Maize Silks: A Pathway Model For Surface Lipid Biosynthesis Based On Simultaneous Profiling Of Polar And Non-Polar Metabolites, Layton Andrew Peddicord Jan 2013

Determination And Quantification Of Surface Lipid Metabolites In Maize Silks: A Pathway Model For Surface Lipid Biosynthesis Based On Simultaneous Profiling Of Polar And Non-Polar Metabolites, Layton Andrew Peddicord

Graduate Theses and Dissertations

The elongated stigmas in maize (i.e. silks) are a vital organ for the reproductive success of a major U.S. agricultural crop. These silks possess an extractible coat of surface lipids that is predominantly composed of a complex array of hydrocarbons that function to protect the silks against abiotic and biotic stresses. While hydrocarbons are most likely produced from the conversion of fatty acids, the exact biochemical mechanisms for their synthesis remain unknown. Our team is leveraging genetic variation and morphological gradients during silk development to dissect the metabolic network responsible for surface lipid accumulation.

These metabolomic efforts require ...


Density Response Of Maize Canopy Architecture In Adapted And Unadapted Synthetic Populations, Naser Bader Alkhalifah Jan 2013

Density Response Of Maize Canopy Architecture In Adapted And Unadapted Synthetic Populations, Naser Bader Alkhalifah

Graduate Theses and Dissertations

ABSTRACT

Since the 1950's, the average maize grain yield, on a per unit area basis, has risen exponentially and without a pause. Associated with this increase have been changes in shoot morphology which permit more light penetration into the canopy. Changes in plant traits including plant height, leaf number, individual leaf area, vertical leaf angle, tassel size and weight, and leaf area density distribution along the main stem have been reported in the literature; however, the response of canopy components to changes in plant density has not been examined in closed populations and at today's densities. The objective ...


Candidate Gene Based Association Study For Nitrogen Use Efficiency And Associated Traits In Maize, Bharath Kumar Thamasandra Narayana Jan 2013

Candidate Gene Based Association Study For Nitrogen Use Efficiency And Associated Traits In Maize, Bharath Kumar Thamasandra Narayana

Graduate Theses and Dissertations

Nitrogen (N) is a major macronutrient used in cereal production that stimulates plant growth and development. Demand for N fertilizer has been growing steadily at an annual growth rate of 1.8 percent due to the continuous increase in the cereal growing areas (mainly maize), and N is needed to maximize yield potential of agricultural crops. It has been estimated that N fertilizer used by cereals is only 33%. The rest of the applied N fertilizer is lost in the combination of surface runoff, gaseous release from soil, leaching and de-nitrification processes. In the future, for a sustainable crop production ...


Controlling Biomass Properties For Optimizing Fast Pyrolysis Products, Brandon Jeffrey Jan 2013

Controlling Biomass Properties For Optimizing Fast Pyrolysis Products, Brandon Jeffrey

Graduate Theses and Dissertations

The energy future of the United States is likely to include a large number of traditional and alternative energy sources and technologies. Fast pyrolysis has been identified as one of the alternative energy conversion processes that could play a role in this energy future. Fast pyrolysis produces solid (biochar), liquid (bio-oil), and gaseous products (syngas). Bio-oil is the main component (up to 80%) and has a number of potentially useful applications. Bio-oil composition is complex and is related to cell wall composition, as compounds in the bio-oil derive from the individual cell wall components cellulose, hemicelluloses, and lignin.

While a ...