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Full-Text Articles in Biology
Greening Rates And Photosynthetic Development Of Leaves In C3 And C4 Plants, Tayler J. Kriss
Greening Rates And Photosynthetic Development Of Leaves In C3 And C4 Plants, Tayler J. Kriss
Master's Theses
To study chlorophyll development time and overall photosynthetic development in C3 and C4 leaves, seeds were germinated in complete darkness and achlorophyllous leaves were then allowed to develop in lighted conditions. Corn (Zea mays, C4), sorghum (Sorghum bicolor, C4), green bean (Phaseolus vulgaris, C3), broad bean (Vicia faba, C3), and wheat (Triticum aestivum, C3) were investigated for the first ten days of sunlight exposure. Chlorophyll concentration, chlorophyll fluorescence, and CO2 gas exchange measurements were conducted daily on the first leaf that emerged after the embryonic leaves of each plant. The first five days of the experiment, days zero to four …
Gas Exchange And Leaf Anatomy Of Andropogon Gerardii Ecotypes Over A Climatic Gradient Of The Great Plains, Jacob T. Olsen
Gas Exchange And Leaf Anatomy Of Andropogon Gerardii Ecotypes Over A Climatic Gradient Of The Great Plains, Jacob T. Olsen
Master's Theses
The phenotype of two Andropogon gerardii subspecies, big bluestem and sand bluestem, varies broadly throughout the Great Plains of North America, giving rise to ecotypes within the species. This study sought to discriminate between genetic and environmental variation of big bluestem and sand bluestem by examining gas exchange and leaf anatomy in common gardens across a climatic gradient of the Great Plains. Thirteen populations of big bluestem and one population of sand bluestem, constituting five ecotypes, were planted in community plots and a single plant plots in a common garden at each of four sites ranging from western Kansas to …
Effects Of Flooding On Photosynthesis And Root Respiration In Salt Cedar (Tamarix Ramosissima), An Invasive Riparian Shrub, Kristen Polacik
Effects Of Flooding On Photosynthesis And Root Respiration In Salt Cedar (Tamarix Ramosissima), An Invasive Riparian Shrub, Kristen Polacik
Master's Theses
The introduced shrub Tamarix ramosissima Lebed. invades riparian zones, but loses competitiveness under flooding. This was tested in Tamarix ramosissima by examining responses to flooding by soil type in a greenhouse setting. A field study examined responses of Tamarix ramosissima and other species to natural flooding. Leaf level photosynthesis rates, stomatal conductance, transpiration, and root alcohol dehydrogenase (ADH) activity were measured weekly to assess oxygen stress. In the field, stomatal conductance, leaf water potential, transpiration, canopy cover, and δ13C were measured as responses to soil water potential, soil moisture, Julian date, relative humidity, and water depth. In the greenhouse study, …