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Potential Mechanisms Related To Salt Tolerance In Bean Plants, Sandra Baumgartner

Masters Theses

Phaseolus vulgaris (navy bean) and P. acutifolius (tepary bean) were grown hydroponically and stressed with -0.25 MPa NaCl for 9 days beginning 22 days after planting. Chloride and sodium distribution in leaves and roots as well as percent ion leakage as an indication of membrane integrity in leaves were determined. Chloride levels in NaCl treated plants were significantly higher than in controls. Chloride levels were not significantly different between plant parts or between plant species. Sodium distribution differed significantly between the roots of navy and tepary but not between the leaves of the two species. Navy root tissue contained twice …

Effects Of Lake Management On Chemical, Physical, And Phycological Characteristics Of A Hypereutrophic Reservoir, Kaye J. Surratt

Masters Theses

Lake Charleston is a 1.1 billion gallon capacity side channel reservoir which was constructed in 1982 as a public drinking water supply for the City of Charleston in Coles County, Illinois. Past studies of the lake indicated an increase in eutrophication and the capacity to support large algal populations. Recent lake management practices include copper sulfate applications as an algicide and aeration to reduce flavor and odor.

In order to assess present lake status and to evaluate the effectiveness of lake management practices, two lake sites were sampled on a weekly basis from May to October, 1989. Chemical, physical, and …

The Effect Of Growth Regulators On Rough Turf At Coles County Airport, Salliana Ryan Erwin

Masters Theses

Twenty-five different combinations of plant growth regulators were evaluated with respect to their effectiveness in controlling rough turf at Coles County Memorial Airport (Illinois). Germination inhibition, control of plant height, suppression of seedheads, and phytotoxicity were considered. Postemergence applications were more effective than preemergence applications in the overall control of the vegetation present. Of the regulators tested, a combination of Escort (metsulfuron methyl; 1/3 oz/acre) and Oust (sulfometuron methyl; 1/4 oz/acre) provided the best postemergence control of both plant height and seedhead suppression, though associated phytotoxic effects were severe. Two other effective combinations were noted: Event (imazethapyr, imazapyr; 10 oz/acre) …