Biology Commons^™

Some Factors Involved In Growth And Sporulation Of Pilobolus Crystallinus Tode And Pilobolus Umbonatus Buller, Kenneth L. Poff

Master's Theses

Pilobolus umbonatus Buller and P. crystallinus Tode grew normally in a nitrogen atmosphere but their sporagnia were non-pigmented. When palced in anaerobic jars along with obligately anaerobic and obligately aerobic bacteria, the fungi grew in the range of oxygen concentrations too low for growth of the aerobic bacterium, but high enough to prevent growth of the anaerobe. The fungi did not grow when the oxygen was depleted to the point that allowed growth of the anaerobic bacterium. Catalase was not produced by the hyphae and trophocysts which normally grow beneath the surface of the medium, but was present in the …

Histological And Cytological Changes In The Small Intestine Of Hyla Versicolor Le Conte During Metamorphosis, Henry B. Robinson

Master's Theses

The object or the present study was to determine the histological and cytological changes that occur, during metamorphosis, in the small intestine of versicolor Le Conte. It was felt that such a study would clarify and amplify earlier observations.

Photoperiodism And Other Factors Affecting The Germination Of Statoblasts Of Lophopodella Carteri (Hyatt), Elizabeth Ann Bergin

Master's Theses

Sample groups of the statoblasts of Lophopodella carteri (Hyatt) were pretreated by drying, cooling, freezing, immersion in water and combinations of these conditions. Then, they were subjected to 24-hour dark and 8, 12, and 24 hour light photoperiods . A control was maintained under natural dark-light (day-night) conditions. The analysis of variance and Newman-Keuls tests were used to analyze the data. The cool wet pretreatment gave the best germination for the statoblasts. For the photoperiods, statoblasts in 8 and 12 hour light periods and the control had the highest germination rate.

When sodium hypochlorite was used to surface-sterilize the stato­ …