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Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata
Due to the low P nature of soils within the fynbos biome of the Cape Floristic Region, plants have developed numerous mechanisms which enable them to better acquire phosphorous. A number of species have been reported to have specialised root morphologies (root clusters, mycorrhizae) that enhance P u...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2017
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| _version_ | 1867613164288344064 |
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| access_status_str | Open Access |
| author | Basic, Dunja |
| author2 | Chimphango, Samson B M |
| author_browse | Basic, Dunja Chimphango, Samson B M |
| author_facet | Chimphango, Samson B M Basic, Dunja |
| author_sort | Basic, Dunja |
| collection | Thesis |
| description | Due to the low P nature of soils within the fynbos biome of the Cape Floristic Region, plants have developed numerous mechanisms which enable them to better acquire phosphorous. A number of species have been reported to have specialised root morphologies (root clusters, mycorrhizae) that enhance P uptake. Plants may also down-regulate the uptake of P by decreasing the expression of genes that encode P transporters. Two Fabaceae species, Podalyria calyptrata and Aspa/athus linearis, were grown in hydroponics for 5 months at a low P supply of 4μM and P-depletion studies were conducted thereafter at 5 levels of external P (4, 10, 20, 50 and lOOμM). Growth rates (biomass accumulation) were also calculated as were root to shoot ratios for both species. A. linearis had a higher uptake rate than P. calyptrata. While the fresh biomass growth rate was similar in both species, P. calyptrata had a higher dry weight root to shoot ratio than A. linearis. The results showed that both species exhibited a lack of response to increasing P concentrations and had similar RGRs. Their uptake rates differed significantly (p<0.05) and this was likely due to their different root:shoot ratios. This indicates that both species would effectively grow in low P soils and in the case of P. calyptrata, in high P soils as well. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/24850 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:47.142Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| 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:11427/24850 Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata Basic, Dunja Chimphango, Samson B M Cramer, Michael D Botany Due to the low P nature of soils within the fynbos biome of the Cape Floristic Region, plants have developed numerous mechanisms which enable them to better acquire phosphorous. A number of species have been reported to have specialised root morphologies (root clusters, mycorrhizae) that enhance P uptake. Plants may also down-regulate the uptake of P by decreasing the expression of genes that encode P transporters. Two Fabaceae species, Podalyria calyptrata and Aspa/athus linearis, were grown in hydroponics for 5 months at a low P supply of 4μM and P-depletion studies were conducted thereafter at 5 levels of external P (4, 10, 20, 50 and lOOμM). Growth rates (biomass accumulation) were also calculated as were root to shoot ratios for both species. A. linearis had a higher uptake rate than P. calyptrata. While the fresh biomass growth rate was similar in both species, P. calyptrata had a higher dry weight root to shoot ratio than A. linearis. The results showed that both species exhibited a lack of response to increasing P concentrations and had similar RGRs. Their uptake rates differed significantly (p<0.05) and this was likely due to their different root:shoot ratios. This indicates that both species would effectively grow in low P soils and in the case of P. calyptrata, in high P soils as well. 2017-08-08T06:48:47Z 2017-08-08T06:48:47Z 2011 Bachelor Thesis Honours BSc (Hons.) http://hdl.handle.net/11427/24850 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Basic, Dunja Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| thesis_degree_str | Bachelor's / Honours |
| title | Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| title_full | Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| title_fullStr | Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| title_full_unstemmed | Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| title_short | Phosphorous uptake rate in two low phosphorous updated species, Aspalathus linearis and Podalyria calyptrata |
| title_sort | phosphorous uptake rate in two low phosphorous updated species aspalathus linearis and podalyria calyptrata |
| topic | Botany |
| url | http://hdl.handle.net/11427/24850 |
| work_keys_str_mv | AT basicdunja phosphorousuptakerateintwolowphosphorousupdatedspeciesaspalathuslinearisandpodalyriacalyptrata |