Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.)
Dissertation (MSc (Agric) Horticulture)--University of Pretoria, 2006.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Published: |
University of Pretoria
2013
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613538606907392 |
|---|---|
| access_status_str | Open Access |
| author2 | Reinhardt, Carl Frederick (Charlie) |
| author_browse | Reinhardt, Carl Frederick (Charlie) |
| author_facet | Reinhardt, Carl Frederick (Charlie) |
| collection | Thesis |
| dc_rights_str_mv | © 2002, 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 (Agric) Horticulture)--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28503 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:37:44.604Z |
| 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:2263/28503 Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) Reinhardt, Carl Frederick (Charlie) upetd@ais.up.ac.za Bothma, Anneline Solanum elaeagnifolium control Solanum elaeagnifolium allelopathy UCTD Dissertation (MSc (Agric) Horticulture)--University of Pretoria, 2006. Silverleaf nightshade is a serious problem weed in many semi-arid regions of the world. Although many research efforts have been devoted to this weed’s interference with crop species, possible chemical interference (allelopathy) has not been thoroughly investigated yet. In the present study, allelopathic potential of silverleaf nightshade foliage was assessed by means of germination bioassays. Preliminary experimentation was necessary to evaluate procedures of the bioassay method to be used, as many different approaches are described in literature. Water infusions and crude water-soluble extracts of silverleaf nightshade foliage inhibited germination and root growth of cotton and lettuce respectively. Osmolalities of the infusions or extracts used were not inhibitory to germination or root growth of either cotton or lettuce. Preliminary exploration of the nature of the chemical substances implicated in this phytotoxic activity suggests that more than one compound is involved. This includes an alkaloid, a saponin and several flavonoidic constituents, implying the presence of a synergistic effect for crude extracts. An anatomical study was conducted in an attempt to link the allelopathic potential of silverleaf nightshade foliage to specific cells or structures in the leaves. It was considered that glandular trichomes, abundant on both leaf surfaces, might harbour phytotoxic secondary metabolites. It was furthermore speculated that stellate trichomes with intrusive basal cells observed to reach the vascular bundles, might be involved in excreting alkaloids contained in the vascular bundle sheath onto the leaf surface. The results of this study represent the first step in showing the allelopathic potential of silverleaf nightshade and laid a foundation for continuing with field studies and more in-depth chemical analyses. Plant Production and Soil Science unrestricted 2013-09-07T13:38:28Z 2005-10-07 2013-09-07T13:38:28Z 2002-09-01 2006-10-07 2005-10-07 Dissertation Bothma, A 2002, Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.), MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28503 > http://hdl.handle.net/2263/28503 http://upetd.up.ac.za/thesis/available/etd-10072005-121704/ © 2002, 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 application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Solanum elaeagnifolium control Solanum elaeagnifolium allelopathy UCTD Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title | Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title_full | Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title_fullStr | Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title_full_unstemmed | Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title_short | Allelopathic potential of silverleaf nightshade ( Solanum elaeagnifolium Cav.) |
| title_sort | allelopathic potential of silverleaf nightshade solanum elaeagnifolium cav |
| topic | Solanum elaeagnifolium control Solanum elaeagnifolium allelopathy UCTD |
| url | http://hdl.handle.net/2263/28503 http://upetd.up.ac.za/thesis/available/etd-10072005-121704/ |