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dc.contributor.authorTheron, N
dc.date.accessioned2007-05-11T10:55:34Z
dc.date.available2007-05-11T10:55:34Z
dc.date.created2006en
dc.date.issued2007-05-11T10:55:34Z
dc.identifier.urihttp://hdl.handle.net/123456789/271
dc.descriptionBSc. fourth year thesis supervised by Prof. Karen Esler.en
dc.description.abstractMorphological and genetic comparisons of a potentially invasive weed (Argemone ochroleuca) from its’ natural (North America) and invaded (South Africa) habitats are presented. Seeds from 13 North American and 13 South African populations were germinated and established in common garden conditions. A variety of morphological and genetic attributes were examined to a) determine if invasion success for this species is reflected in attributes such as seed size; germination rate; growth rate, defence etc and b) if the background variation in morphology and genetics is significantly different between the two groups (natural vs. invaded range). Compared to natural populations, seeds in invaded populations were significantly less variable in size and germinated more consistently, even when taking into account seasonal variance associated with hemisphere of origin. In addition, thorns, specifically on seed capsules, significantly better defended adult plants. Genetic data substantiate the diversity in the native populations. All the South African populations are identical, with one exception; one North American population identical to the South African populations, therefore possibly the origin populations for the South African populations.en
dc.description.statementofresponsibilityVhengani, Lufuno
dc.format.extent76515 bytes
dc.format.extent264580 bytes
dc.format.mimetypeZip
dc.format.mimetypeapplication/pdf
dc.languageEnglishen
dc.language.isoen_US
dc.rightscopyrighten
dc.subjectEntomologyen
dc.titleThe Genetic and Morphological comparison of a potentially invasive weed (Argemone ochroleuca) from its’ natural (North America) and invaded (South Africa) habitaten
dc.mdidentification.purposeTo find out how potentially invasive Argemone really are.en
dc.mdidentification.organizationnameCentre of Excellence for Invasion Biologyen
dc.mdidentification.deliverypointFaculty of Science, Natural Sciences Building, Private Bag X1, University of Stellenbosch, Matielanden
dc.mdidentification.postalcode7602en
dc.mdidentification.phone0218083607en
dc.mdidentification.electronicmailaddressvhengani@sun.ac.zaen
dc.mddataidentification.languageEnglishen
dc.mdusage.specificusagepreliminary studyen
dc.mdusage.userdeterminedlimitationsN/Aen
dc.mdusage.usagedatetime2006
dc.mdconstraints.uselimitationvery small sample sizeen
dc.mdlegalconstraints.accessconstraintscopyrighten
dc.mdlegalconstraints.otherconstraintsSubject to CIB Data rules.en
dc.lilineage.statementN/Aen
dc.dqcompletenessomission.valueunitPercentageen
dc.dqcompletenessomission.valueattributedata100en
dc.mdmaintenanceinformation.maintenanceandupdatefrequencyUnknownen
dc.mdfeaturecataloguedescription.cataloguedate2007-05-11
dc.mddistributor.distributorcontactN/Aen
dc.mdformat.nameExcel and PDFen
dc.mdformat.versionN/Aen
dc.exgeographicboundingbox.westboundlongitudeN/Aen
dc.exgeographicboundingbox.eastboundlongitudeN/Aen
dc.exgeographicboundingbox.northboundlattitudeN/Aen
dc.exgeographicboundingbox.southboundlattitudeN/Aen
dc.exverticalextent.minimumvalueN/Aen
dc.exverticalextent.maximumvalueN/Aen
dc.exverticalextent.unitofmeasuremetersen
dc.cibprojectNAen


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