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The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Molecular and Cell Biology
2015
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| _version_ | 1867613235325173760 |
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| access_status_str | Open Access |
| author | Shen, Arthur Yen-Hsiang |
| author2 | Illing, Nicola |
| author_browse | Illing, Nicola Shen, Arthur Yen-Hsiang |
| author_facet | Illing, Nicola Shen, Arthur Yen-Hsiang |
| author_sort | Shen, Arthur Yen-Hsiang |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13009 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:54.720Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Molecular and Cell Biology |
| publisherStr | Department of Molecular and Cell Biology |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/13009 The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation Shen, Arthur Yen-Hsiang Illing, Nicola Molecular and Cell Biology Includes bibliographical references. In angiosperms, desiccation tolerance, a genetic trait that enables tissues to survive loss of more than 95% of cellular water is widely observed in the seeds, but is only found in the vegetative tissues of a small group of species known as the resurrection plants. Xerophyta humilis is a small resurrection plant indigenous to Southern Africa. In this study, the hypothesis that vegetative desiccation tolerance is derived from an adaptation of seed desiccation tolerance was tested by characterizing changes in the transcriptome of X. humilis leaves during desiccation. The mRNA transcript abundance of a set of 1680 X. humilis genes was analyzed at 6 different stages of water loss in the leaves of X. humilis. Functional enrichment analysis showed that genes that were down-regulated during desiccation were over-represented with genes involved in photosynthesis, cellular developmental processes, as well as transcription regulator activity. Three distinct clusters of up-regulated genes were identified. The earliest set of up-regulated genes were enriched with genes associated with the turnover of proteins and the simultaneous synthesis of proteins required for protection. Enrichment also included genes associated with lipid body synthesis, as well as the transport of storage proteins to vacuoles. Two groups of late desiccation up-regulated genes were also identified, their expression only increased at later stages of desiccation and remained high in the desiccated leaves. 2015-05-28T12:24:46Z 2015-05-28T12:24:46Z 2014 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/13009 eng application/pdf Department of Molecular and Cell Biology Faculty of Science University of Cape Town |
| spellingShingle | Molecular and Cell Biology Shen, Arthur Yen-Hsiang The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| thesis_degree_str | Doctoral |
| title | The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| title_full | The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| title_fullStr | The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| title_full_unstemmed | The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| title_short | The transcriptome response of leaves of the resurrection plant, Xerophyta humilis to desiccation |
| title_sort | transcriptome response of leaves of the resurrection plant xerophyta humilis to desiccation |
| topic | Molecular and Cell Biology |
| url | http://hdl.handle.net/11427/13009 |
| work_keys_str_mv | AT shenarthuryenhsiang thetranscriptomeresponseofleavesoftheresurrectionplantxerophytahumilistodesiccation AT shenarthuryenhsiang transcriptomeresponseofleavesoftheresurrectionplantxerophytahumilistodesiccation |