Browsing Botany by Title
Now showing items 24-43 of 261
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Bark in traditional healthcare in KwaZulu-Natal, South Africa : usage, authentication and sustainability.
(2002)Healthcare in South Africa is polarised between western and traditional African systems of therapy. The latter is consulted by the majority of the population and therefore plays an integral role in the delivery of healthcare ... -
Biochemical and biophysical indicators of chilling tolerance in some species of Eucalyptus.
(1993)Although Eucalyptus species are indigenous to Australia, they have been successfully cultivated in South Africa, where they are mainly used in the mining and paper industries. With the explosion in these industries it ... -
The biochemical and cytokinin changes in the developing and germinating seeds of Podocarpus henkelli stapf.
(1982)A review of the literature revealed that there is a lack of depth in our knowledge of gymnospermous seeds with regard to the development and germination processes. The phytohormones, particularly the cytokinins have ... -
Biochemical and ultrastructural changes associated with chilling injury in soybean seeds during imbibition.
(1996)Biochemical and ultrastructural changes associated with chilling injury (CI) in soybean seeds imbibed at 5°C and 25°C were investigated. Soybean seed germination appeared to be affected by chilling temperatures and initial ... -
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 ... -
Biological activity of traditional medicinal plants used against venereal diseases in South Africa.
(2006)Throughout the history of mankind, many infectious diseases have been treated with plant extracts. Venereal infections are one such group and are regarded as conditions that are highly responsive to traditional treatment. ... -
Biological nitrogen fixation (acetylene reduction) associated with blue-green algal communities in the Mgeni estuary mangrove swamp.
(1987)Nitrogen fixation of blue-green algae associated with Avicennia marina (Forssk.) Vierh. pneumatophores and wet and dry surface sediments were investigated in the Mgeni Estuary mangrove swamp by means of the acetylene reduction ... -
Bioprospecting the flora of southern Africa : optimising plant selections.
(2005)Focused procedures which streamline and optimise plant prioritisation and selection in bioprospecting have the potential to save both time and resources. A variety of semiquantitative techniques were assessed for their ... -
The biosynthesis and production of hypoxoside in Hypoxis hemerocallidea Fisch. and Mey. in vivo and in vitro.
(1989)Hypoxoside, a phenolic diglucoside, with a diarylpentane-type structure, is thought to be the medicinally active constituent of corm extracts of Hypoxis hemerocallidea Fisch. & Mey. which are reputed to alleviate the ... -
Cape elements on high-altitude corridors and edaphic islands.
(2004)Common to the temperate floras throughout sub-Saharan Africa is a group of taxa with strong ties to the Cape Floristic Region (CFR) (≈ Cape elements). Their distribution is limited to the eastern escarpment of Africa (e.g. ... -
Carbohydrate metabolism in Parthenium argentatum Gray.
(1991)The metabolism of carbohydrates in guayule is a subject which has not been considered with respect to its role in cis-polyisoprene synthesis, It has been suggested that acetate or sucrose act as the distal, and isopen ... -
Character variation and a cladistic analysis of the genus Lachenalia Jacq.f. ex Murray (Hyacinthaceae:Massonieae)
(2005)Morphological variation and a cladistic analysis of the large, endemic Southern African genus Lachenalia Jacq.f. ex Murray (Hyacinthaceae: Massonieae) is presented. Its close taxonomic relationship with the small endemic ... -
Characterisation and role of sugarcane invertase with special reference to neutral invertase.
(2000)The relationship between extractable invertase activities and sucrose accumulation in the sugarcane (Saccharum spp. hybrids) culm and in vivo invertase mediated sucrose hydrolysis was investigated to determine the significance ... -
Characterization and control of micropropagation problems in aloe, devil's claw and banana.
(2008)The development of the science of micropropagation from the very initial concept of totipotency to the modern day advancement and sophistication has been affected by a wide range of problems such as hyperhydricity, ... -
A comparative study of the plant ecology of three estuaries : Mgeni, Mhlanga and Mdloti.
(1986)The vegetation of the Mgeni Estuary, Mhlanga Estuary and Mdloti Estuary was analysed according to the Braun-Blanquet phytosociological method using quadrats of 4m2 and 25m2 in area placed subjectively and the Point-Centred ... -
Comparision of two promoters driving transgene expression in water-stressed sugarcane.
(1999)For the expression of transgenes in plant cells, appropriate promoter sequences have to be introduced upstream of the gene to ensure efficient transcription. Tissue- or signal-responsive promoters are in high demand in ... -
Competitive interactions between savanna trees.
(2011)Savannas are socio-economically important ecosystems, which support high floral and faunal diversity. This biome covers large areas of Africa, Australia, South America, India and parts of North America, and is comprised ... -
Consequences of habitat fragmentation for the pollination of wildflowers in moist upland grasslands of KwaZulu-Natal.
(2002)Large areas of moist upland grassland in KwaZulu-Natal are severely fragmented due to large scale farming of exotic trees. The aims of this thesis were to determine whether habitat fragmentation of these grasslands has ... -
Consequences of self-fertilisation for fecundity and progeny performance in invasive plants.
(2011)Plants that can self-fertilise should, on average, be more invasive than plants that can not self-fertilise because they can reproduce regardless of the availability of mates and pollinators. Self-fertilisation should have ... -
Conservation of select South African Disa Berg. species (Orchidaceae) through in vitro seed germination.
(2003)Disa comprises 163 species, 131 of which occur in South Africa (SA). The genus is distributed across winter- and summer-rainfall areas, but few species transverse both climatic regions. Species are therefore regarded as ...