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Certain aspects of the biology of Watsonia SPP
The flowering responses of two species of Watsonia (W. humilis and W. tabularis) were studied both in the field and in the laboratory. There was no conclusive evidence that heat treatments directly influenced the flowering response. Instead, it appears that flowering may result from a number of fact...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613271786258432 |
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| access_status_str | Open Access |
| author | Waher, Ivo Gregor |
| author2 | Mitchell, D T |
| author_browse | Mitchell, D T Waher, Ivo Gregor |
| author_facet | Mitchell, D T Waher, Ivo Gregor |
| author_sort | Waher, Ivo Gregor |
| collection | Thesis |
| description | The flowering responses of two species of Watsonia (W. humilis and W. tabularis) were studied both in the field and in the laboratory. There was no conclusive evidence that heat treatments directly influenced the flowering response. Instead, it appears that flowering may result from a number of factors such as watering, clearing the soil surface of vegetation and transplantation. The effects of temperature on seed germination were also investigated. 15 - 18° are the optimum temperature conditions for germination although viability is not affected by incubation at temperatures up to 35° C. Carbohydrates in the form of mucilaginous polysaccharide are the major storage reserves of the corms. These polysaccharides as well as the ethanol soluble carbohydrates were determined at different stages in the life cycle of Watsonia spp. by means of gas-liquid and paper chromatography. There was little variation in the levels of cold water soluble polysaccharide at different stages in the vegetative development of the corms, but during seed pod formation the monomer components of these polysaccharides declined. The implications of these results are discussed in relation to the ecology of both W. tabularis and W. humilis. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/16640 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:28.738Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/16640 Certain aspects of the biology of Watsonia SPP Waher, Ivo Gregor Mitchell, D T Botany The flowering responses of two species of Watsonia (W. humilis and W. tabularis) were studied both in the field and in the laboratory. There was no conclusive evidence that heat treatments directly influenced the flowering response. Instead, it appears that flowering may result from a number of factors such as watering, clearing the soil surface of vegetation and transplantation. The effects of temperature on seed germination were also investigated. 15 - 18° are the optimum temperature conditions for germination although viability is not affected by incubation at temperatures up to 35° C. Carbohydrates in the form of mucilaginous polysaccharide are the major storage reserves of the corms. These polysaccharides as well as the ethanol soluble carbohydrates were determined at different stages in the life cycle of Watsonia spp. by means of gas-liquid and paper chromatography. There was little variation in the levels of cold water soluble polysaccharide at different stages in the vegetative development of the corms, but during seed pod formation the monomer components of these polysaccharides declined. The implications of these results are discussed in relation to the ecology of both W. tabularis and W. humilis. 2016-02-01T10:03:16Z 2016-02-01T10:03:16Z 1974 Master Thesis Masters MSc http://hdl.handle.net/11427/16640 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Waher, Ivo Gregor Certain aspects of the biology of Watsonia SPP |
| thesis_degree_str | Master's |
| title | Certain aspects of the biology of Watsonia SPP |
| title_full | Certain aspects of the biology of Watsonia SPP |
| title_fullStr | Certain aspects of the biology of Watsonia SPP |
| title_full_unstemmed | Certain aspects of the biology of Watsonia SPP |
| title_short | Certain aspects of the biology of Watsonia SPP |
| title_sort | certain aspects of the biology of watsonia spp |
| topic | Botany |
| url | http://hdl.handle.net/11427/16640 |
| work_keys_str_mv | AT waherivogregor certainaspectsofthebiologyofwatsoniaspp |