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Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance
Dissertation (MSc (Plant Science))--University of Pretoria, 2023.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2024
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| _version_ | 1867613483538841600 |
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| access_status_str | Open Access |
| author2 | Kritzinger, Angelique |
| author_browse | Kritzinger, Angelique |
| author_facet | Kritzinger, Angelique |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Plant Science))--University of Pretoria, 2023. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/94474 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:52.135Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/94474 Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance Kritzinger, Angelique maumelakd@gmail.com Taylor, Nicky Oberlander, Kenneth Carl Maumela, Khodani UCTD Macadamia Drought tolerance Huber value Vein density Water use efficiency Stomatal density Sustainable Development Goals (SDGs) SDG-02: Zero hunger Natural and agricultural sciences theses SDG-02 SDG-12: Responsible consumption and production Natural and agricultural sciences theses SDG-12 Dissertation (MSc (Plant Science))--University of Pretoria, 2023. In South Africa, Macadamia integrifolia, Macadamia tetraphylla, and their hybrids are commonly grown for their edible nuts and consequent nutritional benefits. To improve yields, irrigation is used to grow these trees in regions with inadequate rainfall. Selecting cultivars with desirable leaf anatomical traits, capable of withstanding drought, is one strategy to increase water use efficiency. In this study, we investigated differences in multiple traits related to water use efficiency in common South African macadamia cultivars, including stomatal density, palisade and spongy parenchyma thickness, Huber value, and vein density to determine if cultivars differed in their anatomical characteristics. Cultivar ‘814’ consistently exhibited higher stomatal densities, thicker palisade parenchyma, thicker spongy parenchyma, and higher Huber values compared to cultivars ‘816; ‘695’, ‘842’, and ‘A4’. In contrast, ‘695’ showed greater vein density. The variability in leaf and petiole anatomy was influenced by factors such as the timing of vegetative flush, leaf type, location, and cultivar. Although climate may have played a role, no clear patterns emerged. Genetic factors likely contributed significantly to the observed differences among macadamia cultivars. These findings have implications for selecting drought-tolerant cultivars and improving water management practices in macadamia cultivation, especially in regions with inadequate rainfall. South African Macadamia Association (SAMAC) Water Research Commission (WRC) Plant Science MSc (Plant Science) Unrestricted Faculty of Natural and Agricultural Sciences 2024-02-12T09:19:53Z 2024-02-12T09:19:53Z 2024-04-15 2023-12-15 Dissertation * A2024 http://hdl.handle.net/2263/94474 10.25403/UPresearchdata.25196894 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Macadamia Drought tolerance Huber value Vein density Water use efficiency Stomatal density Sustainable Development Goals (SDGs) SDG-02: Zero hunger Natural and agricultural sciences theses SDG-02 SDG-12: Responsible consumption and production Natural and agricultural sciences theses SDG-12 Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title | Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title_full | Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title_fullStr | Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title_full_unstemmed | Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title_short | Leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| title_sort | leaf anatomical traits of macadamia cultivars with potential links to drought tolerance |
| topic | UCTD Macadamia Drought tolerance Huber value Vein density Water use efficiency Stomatal density Sustainable Development Goals (SDGs) SDG-02: Zero hunger Natural and agricultural sciences theses SDG-02 SDG-12: Responsible consumption and production Natural and agricultural sciences theses SDG-12 |
| url | http://hdl.handle.net/2263/94474 |