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Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa
Dissertation (MInst Agrar)--University of Pretoria, 2006.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613450957488128 |
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| access_status_str | Open Access |
| author2 | Govender, Prem |
| author_browse | Govender, Prem |
| author_facet | Govender, Prem |
| collection | Thesis |
| dc_rights_str_mv | © 2004 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 (MInst Agrar)--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/24966 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:20.940Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| 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:2263/24966 Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa Govender, Prem upetd@up.ac.za Reigner, T. Moleki, Rorisang Anna Confidence Eucalyptus disease and pest resistance Eucalyptus diseases and pests south africa Curculionidae Metabolites UCTD Dissertation (MInst Agrar)--University of Pretoria, 2006. In South Africa, the genus Eucalyptus plays an important role as a plantation tree and hence forms a major economic component in the forest sector. An insect pest of these Eucalyptus species, Gonipterus scutellatus, causes periodic defoliation in the plantations. Plants have extraordinary array of chemicals (secondary metabolites), which defend them from herbivores. This study reports on the seasonal variation of the tannin concentration and carbohydrate content of the leaves of nine Eucalyptus species. Soluble tannins were quantified using Hagerman test and the carbohydrate content with a refractometer. Generally high tannin concentrations were observed during spring and late summer with low concentrations during autumn and winter. During the months of February, April, July tannin concentration was usually found to be higher than the carbohydrate content. The higher concentration of tannin could be linked to the allocation of carbon for the production of tannin instead of carbohydrates for growth. Zoology and Entomology unrestricted 2013-09-06T18:56:31Z 2005-06-02 2013-09-06T18:56:31Z 2003-09-01 2006-06-02 2005-05-25 Dissertation Moleki, RAC 2004, Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa, MInstAgrar dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/24966 > H972/ag http://hdl.handle.net/2263/24966 http://upetd.up.ac.za/thesis/available/etd-05252005-140927/ © 2004 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 | Eucalyptus disease and pest resistance Eucalyptus diseases and pests south africa Curculionidae Metabolites UCTD Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title | Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title_full | Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title_fullStr | Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title_full_unstemmed | Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title_short | Temporal composition of tannin and carbohydrate content in Eucalyptus leaves in South Africa |
| title_sort | temporal composition of tannin and carbohydrate content in eucalyptus leaves in south africa |
| topic | Eucalyptus disease and pest resistance Eucalyptus diseases and pests south africa Curculionidae Metabolites UCTD |
| url | http://hdl.handle.net/2263/24966 http://upetd.up.ac.za/thesis/available/etd-05252005-140927/ |