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Morpho-Physiological Factors Affecting Plant Productivity In Bush And Vine Forms Of Winter Squash (Cucurbita Maxima Duch), Cyril Emery Broderick
Morpho-Physiological Factors Affecting Plant Productivity In Bush And Vine Forms Of Winter Squash (Cucurbita Maxima Duch), Cyril Emery Broderick
Doctoral Dissertations
The productivity of a new bush winter squash cultivar ('Autumn Pride') was compared to that of 'Blue Hubbard', a high-yielding vine cultivar. Yields of 'Autumn Pride' increased with increasing plant density and, at high plant densities, were greater than yields of 'Blue Hubbard' at its near optimum plant density.
Several factors could have contributed to the higher yield potential of 'Autumn Pride'. CO(,2) compensation points were determined to be 38 ppm and 77 ppm CO(,2) for 'Autumn Pride' and 'Blue Hubbard', respectively, at 30(DEGREES)C. 'Autumn Pride' had two layers of palisade parenchyma cells, occupying 74 percent of the mesophyll. In …
Electrophysiological Studies On Ulmus Americana, Jill Stanley Kathleen Shipman
Electrophysiological Studies On Ulmus Americana, Jill Stanley Kathleen Shipman
Doctoral Dissertations
Although membrane potentials have been measured in algal cells and in large cells of some higher plants, this investigation is the first to include such measurements in mesophyll cells of elm (Ulmus americana) leaves. The inquiry entailed the development of the technique for measuring elm leaf cell membrane potentials, the determination of membrane potentials expected of healthy, greenhouse elms, and the effects of various physical and chemical factors on the membrane potentials of elm leaf cells.
The membrane potential of a specific cell, was measured by amplifying the potential difference between a microelectrode inserted in the cell and a reference …