You are here
Sulfur-35 incorporation in the seagrass Thalassia testudinum under oxic and anoxic conditions
| Title: | Sulfur-35 incorporation in the seagrass Thalassia testudinum under oxic and anoxic conditions. |
 105 views 33 downloads |
|---|---|---|
| Name(s): |
Peters, Jasmine Star. Florida Atlantic University, Degree grantor Koch, Marguerite, Thesis advisor |
|
| Type of Resource: | text | |
| Genre: | Electronic Thesis Or Dissertation | |
| Issuance: | monographic | |
| Date Issued: | 2006 | |
| Publisher: | Florida Atlantic University | |
| Place of Publication: | Boca Raton, Fla. | |
| Physical Form: | application/pdf | |
| Extent: | 31 p. | |
| Language(s): | English | |
| Summary: | Currently, there is a great deal of interest in the role of sulfur in the seagrass ecosystems and for sulfide, a known phytotoxin, in particular. This research used a 35S tracer technique to examine sulfur metabolism in the seagrass Thalassia testudinum. The uptake of the 35S radiotracer was documented at similar rates under both oxic and anoxic treatments. The highest total radioactivity was in root and rhizome tissue, as compared to the leaves. 35S translocation from roots to leaves was found to be more efficient in young versus mature leaves. Total sulfur uptake was estimated and found to be significantly different between root and rhizome tissue under oxic conditions. In the anoxic treatment, 1 mM sulfide may have been a threshold, at which the seagrass showed reduced uptake of 35S into the below-ground tissue. While the plants assisted in the production of sulfide in this experiment, sulfide accumulation may inhibit 35S uptake. This is counter to the idea of increased sulfide intrusion under sediment hypoxia. This study represents the first attempt to use 35S to trace sulfur incorporation into seagrass; further research will be required to understand the complex sulfur biochemistry of these important marine plants using this method. | |
| Identifier: | 9780542745959 (isbn), 13385 (digitool), FADT13385 (IID), fau:10235 (fedora) | |
| Note(s): |
Charles E. Schmidt College of Science Thesis (M.S.)--Florida Atlantic University, 2006. |
|
| Subject(s): |
Seagrasses--Ecology Sulfates--Physiological effect Plant morphology Marine sediments |
|
| Held by: | Florida Atlantic University Libraries | |
| Persistent Link to This Record: | http://purl.flvc.org/fcla/dt/13385 | |
| Sublocation: | Digital Library | |
| Use and Reproduction: | Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder. | |
| Use and Reproduction: | http://rightsstatements.org/vocab/InC/1.0/ | |
| Host Institution: | FAU | |
| Is Part of Series: | Florida Atlantic University Digital Library Collections. |
