Dissertations and Theses @ UNI
Availability
Open Access Thesis
Keywords
Plants--Effect of light on; Soybean;
Abstract
Seedlings of soybean (Glycine max L. L. var Northrup King S1937) exhibit diaheliotropic leaf movements, and, when water stressed, paraheliotropic leaf movements. These are controlled by the pulvinus at the base of each leaf. The receptor site for the light stimulus was located by covering portions of the leaf, including the leaf lamina, leaf veins, and pulvinus, with India ink, and observing the effect on leaf movement. The pulvinus was the receptor site for both diaheliotropic and paraheliotropic leaf movements. The role of different colors of light in diaheliotropism and paraheliotropism was determined by using filters which removed broad bands of light wavelengths. Blue light was necessary for both diaheliotropism and paraheliotropism. Interference filters were used to expose soybean leaves to selected blue light wavelengths. The amount of diaheliotropic leaf movement was measured at each wavelength, and was used to obtain an action spectrum. Reception of blue light by the pulvinus contributes to the control of leaf movement and thus in part determines the amount of total radiation received by the leaf.
Year of Submission
1987
Degree Name
Master of Arts
Department
Department of Biology
First Advisor
Virginia Berg
Second Advisor
Robert Seager
Third Advisor
Paul Whitson
Date Original
1987
Object Description
1 PDF file (38 leaves)
Copyright
©1987 Raymon Alan Donahue
Language
en
File Format
application/pdf
Recommended Citation
Donahue, Raymon Alan, "Receptor Sites and Light Stimuli in Soybean Leaf Orientation" (1987). Dissertations and Theses @ UNI. 2502.
https://scholarworks.uni.edu/etd/2502
Comments
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