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dc.contributor.authorTheron, N
dc.contributor.authorEsler, KJ
dc.contributor.authorDreyer, L
dc.contributor.authorJansen van Vuuren, B
dc.contributor.authorRambau, V
dc.date.accessioned2007-06-20T11:19:56Z
dc.date.available2007-06-20T11:19:56Z
dc.date.issued2007-04
dc.identifier.issn0254-6299en
dc.identifier.urihttp://hdl.handle.net/123456789/296
dc.description.abstractMorphological and genetic comparisons of a potentially invasive weed (Argemone ochroleuca) from its natural (Mexico) and invaded (South Africa) habitats are presented. Seeds from 14 Mexican and 13 South African populations were germinated and established in controlled 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, adult plants were significantly better defended by thorns, specifically on seed capsules. Genetic data were not yet available at the time of writing.en
dc.description.sponsorshipC.I.Ben
dc.format.extent70151 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherElsevieren
dc.subjectInvasion successen
dc.subjectPlant morphological attributesen
dc.subjectGenetic variationen
dc.titleGenetic and morphological comparisons of a potentially invasive weed (Argemone ochroleuca) from its natural (Mexico) and invaded (South Africa) habitaten
dc.typePublished Conference Proceedingsen
dc.cibjournalSouth African Journal of Botanyen
dc.cibprojectDeterminants of invasion and scenarios of changeen


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