Date of this Version
Thesis (M.S.)--University of Nebraska--Lincoln, 1959. Department of Agronomy.
These investigations were designed to provide information involving the basis of bud dormancy in perennial weeds. The scope of study broadened as the work progressed. Thus, attempts to observe the growth of tanweed seedlings led to germination trials of dormant seeds. Attempts to establish growth of rhizome sections for winter studies in the greenhouse led to the design of an experiment to determine the existence of an interaction between gibberellic acid treatment and exposure to supplementary red light.
Attempts to determine the homogeneity or heterogeneity of adjacent field plots led to the excavation, exposure and measurement of three tanweed rhizome systems. Desire for representative sampling of the plant populations also led to the observation of abnormal bud growth on a limited area of tanweed rhizome. Within this area, an abundance of fungal mycelia could be seen. Preliminary investigations were undertaken to determine whether this abnormal growth was associated with the presence of the fungus.
These investigations extended into three divisions – field, greenhouse and laboratory. The phonological studies were undertaken in the field and the greenhouse; the physiological studies were pursued in the greenhouse and the laboratory.
Advisors: N. E. Schafer and Francis A. Haskins.