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Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes
Thesis (MscAgric (Viticulture and Oenology))--University of Stellenbosch, 2007.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2007
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| _version_ | 1867614131064930304 |
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| access_status_str | Open Access |
| author | Fraser, W. J. |
| author2 | Huysamer, M. |
| author_browse | Fraser, W. J. Huysamer, M. |
| author_facet | Huysamer, M. Fraser, W. J. |
| author_sort | Fraser, W. J. |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MscAgric (Viticulture and Oenology))--University of Stellenbosch, 2007. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/3079 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:47:09.638Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/3079 Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes Fraser, W. J. Huysamer, M. Oberholster, A. Avenant, J. H. University of Stellenbosch. Faculty of Agrisciences. Dept. of Viticulture and Oenology. Dissertations -- Agriculture Theses -- Agriculture Dissertations -- Viticulture and oenology Theses -- Viticulture and oenology Table grapes -- Biotechnology Fruit -- Flavor and odor Thesis (MscAgric (Viticulture and Oenology))--University of Stellenbosch, 2007. Regal Seedless is a white, seedless grape which has the potential to become a profitable cultivar for the table grape producer since it has the advantages of early season harvesting and inherently large berries. There is, however, a downside to this cultivar, namely the seasonal occurrence of an unacceptable, astringent taste. This negative taste affects the demand by local and international markets. The astringency perception is due to the presence of phenolic compounds. It is well known that the phenolic composition and concentration change during the ripening of the grape. Different postharvest treatments are applied to fresh fruit like persimmons to remove astringency. These treatments include the use of carbon dioxide, nitrogen and ethanol. The aim of this study was to determine the optimum maturity level for Regal Seedless where the phenolic concentration is the lowest and the astringent taste acceptable. The use of postharvest treatments to manipulate the taste and the phenolic content, were also investigated. The effect on other quality parameters like total soluble solids (TSS), pH and total titratable acidity (TTA) were also evaluated. Masters 2007-11-05T06:10:10Z 2010-06-01T09:05:42Z 2007-11-05T06:10:10Z 2010-06-01T09:05:42Z 2007-03 Thesis http://hdl.handle.net/10019.1/3079 en University of Stellenbosch 876211 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Dissertations -- Agriculture Theses -- Agriculture Dissertations -- Viticulture and oenology Theses -- Viticulture and oenology Table grapes -- Biotechnology Fruit -- Flavor and odor Fraser, W. J. Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title | Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title_full | Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title_fullStr | Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title_full_unstemmed | Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title_short | Manipulation of the taste of Regal Seedless (Vitis vinifera L.) table grapes |
| title_sort | manipulation of the taste of regal seedless vitis vinifera l table grapes |
| topic | Dissertations -- Agriculture Theses -- Agriculture Dissertations -- Viticulture and oenology Theses -- Viticulture and oenology Table grapes -- Biotechnology Fruit -- Flavor and odor |
| url | http://hdl.handle.net/10019.1/3079 |
| work_keys_str_mv | AT fraserwj manipulationofthetasteofregalseedlessvitisviniferaltablegrapes |