Thesis
Photosynthetic performance of single-cell C₄ species (Chenopodiaceae)
Washington State University
Master of Science (MS), Washington State University
2007
Handle:
https://hdl.handle.net/2376/103447
Abstract
This study compared the light and CO2 response curves of two single-cell C4 species, Bienertia sinuspersici and Suaeda (formerly Borszczowia) aralocaspica (Bunge, to closely related Kranz-type C4 species and C3 species. The Kranz-type C4 species were represented by Suaeda taxifolia (Suaedoid type) and S. eltonica (Conospermoid type). Suaeda heterophylla and S. maritima were the representative C3 species; both are Brezia anatomical subtypes (Schütze, Freitag et al. 2003). Photosynthetic rates were similar between the single-cell C4 species and the Kranz-type C4 species with S. aralocaspica having slightly higher assimilation rates and B. sinuspersici having slightly lower assimilation rates than S. taxifolia and S. eltonica on area, chlorophyll, and protein bases. However, both single-cell C4 species had higher assimilation rates than their Kranz-type C4 counterparts when rates were expressed on a Rubisco basis. The single-cell C4 and Kranz-type C4 species had similar CO2 compensation points, saturation of photosynthesis near ambient CO2, Rubisco to soluble protein ratio, and water use efficiency. The values for these parameters were significantly different from the C3 species. The results suggest that the C4 cycle is functioning efficiently in the single-cell C4 systems, and that the single-cell C4 mechanism may have a more efficient Rubisco enzyme than the Kranz-type C4.
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Details
- Title
- Photosynthetic performance of single-cell C₄ species (Chenopodiaceae)
- Creators
- Monica Elizabeth Smith
- Contributors
- Gerald E Edwards (Chair) - Washington State University, Biological Sciences, School of
- Awarding Institution
- Washington State University
- Academic Unit
- Biological Sciences, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525126701842
- Language
- English
- Resource Type
- Thesis