Browsing Masters Degrees (Botany) by Issue Date
Now showing items 41-60 of 130
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The development of short-to-medium and long-term germplasm storage protocols for Eucalyptus spp.
(1998)Eucalyptus trees are a significant source of fuelwood, timber and raw material for the paper and pulp industry. In South Africa, Eucalyptus grandis and its hybrids are in high demand due to their fast growth and suitability ... -
Aspects of the invasion of southern tall grassveld by Aristida junciformis subsp. junciformis Trin. et Rupr.
(1998)Aristida junciformis subsp. junciformis Trin. et Rupr. is an indigenous, densely tufted, evergreen perennial grass associated with the degeneration of grasslands over large areas of South Africa. More than two hundred ... -
An investigation of plants used in South Africa for the treatment of hypertension.
(1998)In most countries, as many as 15 to 25% of the adult population have raised blood pressure. People with hypertension, and even those with mild elevation of blood pressure, are at an increased risk of cardiovascular disease, ... -
The development of in vitro rooting systems for cold-tolerant Eucalyptus grandis x nitens clones and the assessment of the hydraulic efficiency of roots produced by in vitro vs. cutting propagation.
(1999)Hybrid clones of the fast-growing Eucalyptus grandis and cold-tolerant E. nitens (GN clones) have been identified by the South African Forestry Industry as being highly suitable for plantations in cold-dry marginal areas. ... -
Prostaglandin-synthesis inhibitory activity from the leaves of Siphonochilus aethiopicus used in the treatment of dysmenorrhoea.
(1999)Plants used by southern African traditional healers for the treatment of menstrual pains were screened for prostaglandin-synthesis inhibitors and the ability to reduce isolated uterine muscle contraction using the ... -
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 ... -
Cryopreservation of Pinus patula Scheide et Deppe embryogenic tissue.
(1999)Embryogenic tissue of Pinus patula Scheide et Deppe was initiated from immature green female cones during the months of November 1996 to February 1997 and December 1997 to January 1998. Tissue was maintained on MSG3 ... -
Some investigations of the responses of Quercus robur and Ekebergia capensis embryonic axes to dehydration and cryopreservation.
(2000)Recalcitrant seeds are those that are shed at high water contents, are actively metabolic throughout development, when they are, and remain, desiccation-sensitive, and may also be chilling sensitive. These properties ... -
Anti-inflammatory and anti-bacterial activity of South African Erythrina species.
(2000)An investigation was undertaken to determine whether Erythrina species indigenous to South Africa contained the same type of compounds as Erythrina species not found in South Africa and to determine whether they displayed ... -
The effect of elevated CO2 levels on the growth of two Acacia species.
(2001)Climate change, induced by increases in the concentration of greenhouse gases in the atmosphere, can affect the growth and community structure of ecosystems in two ways. Firstly directly through changes in atmospheric ... -
Aluminium-induced gene expression in sugarcane roots.
(2002)Due to the increasing prevalence and severity of Al phytoxicity in certain regions of the South African sugar industry, a research programme has been initiated at SASEX to elucidate the molecular mechanisms by which ... -
Evaluation of recirculating hydroponic systems for eucalyptus cutting production.
(2002)In South Africa, Eucalyptus grandis and hybrids of this genus are planted over 196000 ha of Mondi Forests land. The temperate and cold tolerant species (E. grandis, and E. grandis X E. nitens) occupy 142000 ha and the ... -
A study of some chilling responses of recalcitrant seeds of Avicennia marina (Forssk.) Vierh. and Ekebergia capensis Sparrm.
(2002)Seeds remain the most convenient and successful way for storing the genetic diversity of plant species and for producing new plants routinely for agriculture and horticulture. The importance of seed storage and the ability ... -
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 ... -
Development of novel antibacterial and antiviral transgene vectors and techniques for their application and analysis in sugarcane.
(2002)Sugarcane is challenged by a number of phytopathogenic bacteria and viruses that are best managed by the development of resistant varieties. Genetic engineering is a promising strategy in such breeding efforts, as it ... -
The application of microsatellites to sugarcane parentage determination and varietal identification.
(2002)The use of microsatellite markers has matured and become commonplace for plant genome analyses and is now poised for widespread practical application in sugarcane. Sequence Tagged Microsatellite Site (STMS) amplification ... -
In vitro propagation of eucalytpus clones using a temporary immersion bioreactor system (RITA)
(2003)Breeding and clonal programs in South African Forestry industry are designed to provide genetically superior trees to supply the forest product industry. Applied biotechnology, and in particular tissue culture, has been ... -
Storage of frequently used traditional South African medicinal plants.
(2003)The post-harvest physiology of nine frequently used indigenous southern African medicinal plants was investigated, in particular the effects of storage time and accelerated ageing on the biological activity and chemical ... -
Screening of traditionally used South African medicinal plants against Candida albicans.
(2003)Candida species were discovered more than a century ago as a causative organism of oral thrush. In HIV patients, the presence of oral candidiasis has been shown to be the earliest opportunistic infection. Candidiasis ... -
Establishment of an indirect organogenesis protocol for Eucalyptus grandis species and hybrids.
(2004)The prospect of integrating transgenic eucalypts with conventional breeding programmes is of value to the Plantation Forestry and Forest Products Industries. However, significant progress in this regard has still to be ...