Iron and Sulfur Cycling in the Rhizosphere of Wild Rice (Zizania palustris)
2016-08
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Iron and Sulfur Cycling in the Rhizosphere of Wild Rice (Zizania palustris)
Authors
Published Date
2016-08
Publisher
Type
Thesis or Dissertation
Abstract
Wild rice (Zizania palustris), an annual macrophyte with significant cultural, economic, and ecological value, grown in high sulfate develops black iron sulfide precipitates on root surfaces, and produces fewer and lighter seeds, leading to decreased populations long-term. To investigate the role of iron sulfide precipitates in impaired seed production, wild rice plants grown in buckets were exposed to 300 mg/L of sulfate, and harvested biweekly for extraction of root acid volatile sulfide (AVS) and weak acid extractable iron and analysis of plant and seed N. In sulfate-amended plants, root AVS accumulated rapidly just prior to seed production. Simultaneously, iron speciation of the root precipitate shifted from Fe(III) to Fe(II), consistent with a transition from iron (hydr)oxide to iron sulfide. Sulfate-amended plants produced fewer, lighter seeds with less nitrogen. It is suggested that sulfide inhibits N uptake, causing rapid AVS accumulation during the reproductive life stage to disproportionately harm seed production.
Keywords
Description
University of Minnesota M.S. thesis. August 2016. Major: Water Resources Science. Advisors: Nathan Johnson, John Pastor. 1 computer file (PDF); v, 33 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
LaFond-Hudson, Sophia. (2016). Iron and Sulfur Cycling in the Rhizosphere of Wild Rice (Zizania palustris). Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/182687.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.