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1	Improving Methods for the Successful Establishment of Switchgrass Monin, Whitney Marie 01 January 2014 (has links) Our research investigated whether priming switchgrass seeds with water or ethephon would increase stand establishment in the field. ‘Alamo’ seed germinated faster and grew taller than ‘Cave-in-Rock.Seeds primed for six days in water or for one day in ethephon 10 mM had the greatest seedling densities. In growth chamber environments seed priming were tested to hasten germination velocity. Seeds primed for two, four or six days in water germinated faster than unprimed seeds. Ethephon treatments reduced overall germination and germination velocity. Accent and Accent Q herbicides containing nicosulfuron are used to control weeds. To test ‘Alamo’ sensitivity to these herbicides, greenhouse evaluations were conducted. Seedlings treated with Accent Q had lower shoot fresh and dry weights than Accent treated seedlings. Seedling atrazine tolerance was examined in a greenhouse study at various growth stages (1, 2 and 4 true leaves). One and two true leaf were more sensitive to herbicide damage than the 4 leaf seedlings. To investigate difference in atrazine tolerance due to differential atrazine metabolism, 14C atrazine metabolism was examined in 1, 2 and 4 leaf ‘Alamo’ seedlings. 24-48 hours after exposure, 4 leaf seedlings metabolized atrazine at a greater rate than 1 and 2 leaf stage seedlings. switchgrass establishment germination velocity herbicide metabolism atrazine Oil, Gas, and Energy
2	Ursachen des Invasionserfolges von Rhododendron ponticum L. auf den Britischen Inseln: Einfluss von Habitat und Genotyp / The invasion success of Rhododendron ponticum L. in the British Isles: effects of habitat and genotypes Erfmeier, Alexandra 27 April 2004 (has links) No description available. 580 Pflanzen (Botanik) Mathematics and Computer Science Biologische Invasionen Biometrie Blattmerkmale Common Garden Experiment Genetische Veränderung Hierarchisches Beprobungsdesign Invasibilität Invasivität Keimlingsetablierung Keimraten Keimungsgeschwindigkeit Lokale Anpassung Populationsökologie release hypothesis Ressourcen-Verfügbarkeit Rhododendron ponticum Verpflanzungsexperiment Wachstumsraten biological invasions biometry common garden experiment genetic shift germination rates germination velocity growth rates invasibility invasiveness leaf characteristics local adaptation nested sampling design population ecology release hypothesis ressource availability Rhododendron ponticum seedling establishment transplant experiment 42.07 42.44 WL WN

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Improving Methods for the Successful Establishment of Switchgrass

Ursachen des Invasionserfolges von Rhododendron ponticum L. auf den Britischen Inseln: Einfluss von Habitat und Genotyp / The invasion success of Rhododendron ponticum L. in the British Isles: effects of habitat and genotypes