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Identification Of Belowground Woody Structures Using Molecular Biomarkers, Benny R. Bobowski

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the last two decades substantial progress has been made in understanding seed bank dynamics and the contribution of the soil seed bank to a post-disturbance plant community. There has been relatively little progress, however, in understanding perennial bud bank dynamics and the contribution of the soil bud bank to secondary succession. This lack of information is due primarily to the inability to reliably identify roots, rhizomes, and lignotubers that lie dormant beneath the soil surface. This scientific investigation, therefore, addressed the issue of identification of belowground woody structures.

The first objective was to develop a methodology that utilizes molecular …

Development Of Super-Dwarf Wheat Under Stress Conditions Simulating Those On The Space Station Mir, Liming Jiang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Super-Dwarf wheat plants were grown in simulation growth chambers under 12 treatments with three photoperiods (18 h, 21 h, 24 h) and four carbon-dioxide levels (360, 1200, 3000, and 7000 μmol/mol). Carbon-dioxide concentrations affected flower initiation rates of Super-Dwarf wheat. The optimum CO₂ level for flower initiation and development was 1200 μmol•mol^-1. Super-optimum CO₂ levels delayed flower initiation, but did not decrease final flower bud number per head. Longer photoperiods not only accelerated flower initiation rates, but also decreased deleterious effects of super-optimum C0². Flower bud size and head length at the same developmental …