The effect of light intensity on the incorporation of calcium carbonate into the algal skeleton inBossiala orbigniana (Descaisne) Silva (1957) (Corallinaceae) was studied. Calcium-45 labeling of terminal segments under experimental laboratory conditions was used to estimate calcification rate. Plant sections were tested under each of six light intensities ranging between zero (darkness) and 1960 pW-2cm Calcium incorporation was found to be enhanced in light treatments as compared with dark treatment. Light of intensities ranging from 285 pW cm-2 to 1960 pW cm-2gave enhancement effects which were not significantly different from each other. Three alternate hypotheses are offered to explain the observed pattern of enhancement. The most likely hypothesis postulates that under the experimental conditions used, light is not limiting to calcium carbonate deposition in the carbonate skeleton of Bossiala orbigniana.
Ariel A. Roth
Conrad D. Clausen
Clyde L. Webster
Master of Arts (MA)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Plants, Effect of calcium on Photochemistry
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Logan, Carol D., "The Effect of Light Intensity on the Incorporation of Calcium into the Carbonate Skeleton in BOSSIELLA ORBIGNIANIA" (1980). Loma Linda University Electronic Theses, Dissertations & Projects. 727.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives