Abstract

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.

LLU Discipline

Biology

Department

Biology

School

Graduate School

First Advisor

Ariel A. Roth

Second Advisor

Conrad D. Clausen

Third Advisor

Clyde L. Webster

Degree Name

Master of Arts (MA)

Degree Level

M.A.

Year Degree Awarded

1980

Date (Title Page)

6-1980

Language

English

Library of Congress/MESH Subject Headings

Plants, Effect of calcium on Photochemistry

Type

Thesis

Page Count

vii; 71

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

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.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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