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The Bryoecology Of Montgomery County, Illinois, Elbert A. Traylor

Masters Theses

No abstract provided.

Cytological Investigations Of Eremosphaera Viridis De Bary, Richard Allen Valentino

Masters Theses

Eremosphaera viridis de Bary was studied with light microscope techniques to determine the method of cytokinesis and to explain the ontogeny of the membranous ring separating the mature daughter cells in the intact sporangium.

It is proposed that cytokinesis in this organism is phylogenetically advanced and that the separation of mature daughter cells involves the sequential deposition of two cell walls. The first wall develops centripetally by the addition of membrane subunits. The resulting cleavage furrow is oriented by transverse microtubules found along the cell division plane. The newly formed walls separate the two daughter cells and give rise to …

A Taxonomic Study Of The Lichen Flora At The Peaks Of Otter Natural Area Along The Blue Ridge Parkway, Bedford County, Virginia, Michael L. Slaughter

Masters Theses

No abstract provided.

The Peristome Teeth Of Selected Genera Of Acrocarpous Musci Of East Central Illinois, Roger Mcbroom

Masters Theses

No abstract provided.

Oil-Bodies Of Selected Leafy Liverworts Of East-Central Illinois, Steven Monroe Martin

Masters Theses

Oil-bodies are distinct and varied structures found only in the Hepaticae and with particular frequency in the Jungermanniales. Untill relatively recently the oil-body has been virtually ignored by liverwort morphologists and taxonomists.

This study includes descriptions and photomicrographs of the oil-bodies of 23 species and 14 genera in 9 familes of leafy liverworts of east-central Illinois. Diagnostic characteristics recorded for each species include the number of oil-bodies per cell, size range of the oil-bodies, color, shape, texture and arrangement of the oil-bodies within the cell. It was found that the familes Lepidoziaceae, Calypogeiaceae, Jungermanniaceae, Scapaniaceae, Porellaceae and Frullaniaceae are composed …

Aquatic Plant Communities Of East-Central Illinois, Randolph Lee Vogel

Masters Theses

Aquatic plant communities of east-central Illinois were studied during the late summers of 1971 and 1976. Frequencies, relative frequencies and frequency of dominance were calculated for the various taxa. At the pond level, changes in the flora over the 5-year span have taken place, usually consisting of the addition or subtraction of one species. Overall, however, it was found that the aquatic community has remained relatively static, as has the percentage of ponds lacking aquatic plants. Factors influencing distributions and sterility are discussed and it was concluded that all the factors play varying roles, but no one factor or combination …

Production And Utilization Of Sunflower Food Plots At Shelbyville Wildlife Management Area, Illinois, Duane T. Dust

Masters Theses

Three sunflower (Helianthus annuus) fields from 3.2 ha to 1.0 ha in size, planted on the Shelbyville Wildlife Management Area, Illinois were analyzed for seed production and utilization by birds. Seed in heads and on the ground were sampled and species and numbers of birds in the fields were censused at two week intervals from September, 1976 to February, 1977. Decline in seed availability was most rapid in the smallest field and least rapid in the largest field. Fields and portions of fields adjacent to wooded cover were also utilized more rapidly. American goldfinch (Spinus tristis) …

Germination Study Of Dormant Cercis Canadensis L. Seed, Glenn Hosokawa

Masters Theses

Cercis canadensis L. (redbud) seeds have been shown to require both scarification and stratification before germination occurs. Seeds which were leached prior to the scarification-stratification treatments were found to germinate more quickly, and CaSO₄ solution was found to enhance germination. However, the percent germination remained approximately the same and leaching failed to substitute for the stratification requirement. Extraction studies indicated that germination inhibitors were present in scarified-non stratified seeds, however, the presence of germination promoters in scarified-stratified seeds could not be demonstrated. Germination occurred in either light or dark conditions. Gibberellic acid was found to substitute for stratification, and …

Saxicolous Bryophytes Of Coles And Clark Counties, Terri M. Simon

Masters Theses

No abstract provided.