Doctoral Degrees (Botany)
Recent Submissions
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Pollination and geographical divergence in flower colour of the drosera cistiflora species complex, or 'how the snotrosie got its colours'.
(2019)The question of floral colour diversity among congeneric plants has intrigued evolutionary biologists since Lamarck—yet remains a hot topic amid the varied groundbreaking ecological insights that emerge to this day. I ... -
Effects of antifungal treatments on some recalcitrant seeds.
(2017)Abstract available in PDF file. -
Towards ameliorating some of the stresses associated with the procedural steps involved in the cryopreservation of recalcitrant-seeded germplasm.
(2017)Abstract available in PDF file. -
Automatic classification and ecological profiles of South-Western Transvaal Highveld grassland.
(1973)Abstract available in PDF file. -
Vitamin B-6 deficiency : biochemical and physiological changes with special emphasis on zinc status
(1999)Abstract available on PDF file. -
Biochemical, physiological and agronomic response of various sweet potato cultivars/varieties to drought stress in rainout shelters and field conditions.
(2014)Drought is and will always be an issue in the cultivation of plants. Some plants have the ability to withstand a drought conditions to a certain degree while others, with other useful attributes, fail dismally. The value ... -
Investigations on the biological effects of smoke-water and smoke-derived compounds in agriculture and horticulture.
(2015)Abstract available in PDF file. -
The interaction between endophytic Fusarium species and Eldana saccharina (Lepidoptera) following in vitro mutagenesis for F. sacchari tolerance to control the borer in sugarcane.
(2015)Eldana saccharina is a major pest in the South African sugar industry. Stalk damage by this borer and infection of bored tissue by opportunistic fungi result in loss of biomass and sucrose content, respectively. Amongst ... -
In vitro regeneration and secondary metabolites in cyrtanthus species.
(2013)Perennial geophytes form part of the diversified flora in southern Africa. The traditional medicinal system, integrates various plant components in the treatment of diverse ailments. In South Africa, bulbs are part of the ... -
Mosquitocidal activity against Anopheles arabiensis of plants used as mosquito repellents in South Africa.
(2014)Ten plant species that are used as mosquito repellent in South Africa, Aloe ferox (leaves), Atalaya alata (leaves), Balanites maughamii (bark), Clausena anisata (leaves), Croton menyaarthii (leaves), Lippia javanica (leaves), ... -
Growth characteristics of three Eucalyptus clonal hybrids in response to drought stress : the underlying physiology.
(2012)Previous research by Drew et al. (2009) on a SAPPI dendrometer trial, in northern KwaZulu-Natal, South Africa, yielded growth results for two Eucalyptus grandis clones (termed E. grandis x urophylla (GU) and E. grandis x ... -
Ultrastructure of the germinating Welwitschia mirabilis seed.
(1975)The structure and chemical composition of quiescent Welwitschia mirabilis (Hooker fil.) seeds and resultant changes occurring during the first 7 days of germination were studied. Research was focussed on the megagametophyte ... -
A plant ecological survey of the Umfolozi Game Reserve, Zululand.
(1972)A landscape unit approach based on use of airphotos was used for investigation of Deciduous Acacia Woodland in the Reserve. The approach was useful for indicating that a quantity of as few as 531 samples could be suitable ... -
Abscisic acid and other hormonal effects on growth in Spirodela.
(1969)The effects of abscisic acid In particular, as well well as gibberellic acid and the cytoklnlns, 6-benzyladenine, kinetin, and 6-dlmethylal lalylamlnopurine, on the growth of Spirodela oligorrhiza were investigated. Abscisic ... -
'n Plantekologiese opname van Boschberg en sy omringende gebiede met spesiale verwysing na die weidingsfaktor.
(1972)No abstract available. -
Tissue culture studies on citrus and Welwitschia.
(1972)Part I. IN VITRO CULTURE OF CITRUS EMBRYOS AND NUCELLAR ISOLATES Zygotic embryos of the Ellendale mandarin, a monoembryonic variety of citrus, were cultured on modified basal media of Murashige and Skoog (BM[1]), and ... -
Seed dormancy and germination in Protea compacta R.Br. and Leucadendron daphnoides Meisn.
(1974)The germination responses of seed to a wide variety of treatments showed that both the pericarp and the embryo contribute to the dormant condition in Protea compacta. Germination can be improved to a greater or lesser ... -
Studies on the primary phloem of Gomphocarpus physocarpus.
(1974)Penetration of the stems and leaves of Gomphocnrpus physocarpus by the aphid, Aphis nerii was studied with light and phase microscopes. Penetration of the epidermis and ground tissue was largely intercellular, that ... -
Cytokinins in Lupinis albus L.
(1978)A review of the literature pertaining to the sites of synthesis, distribution and metabolism of cytokinins, established that there was a need to investigate the quantitative and qualitative changes in cytokinin ...
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