Browsing Masters Degrees (Botany) by Issue Date
Now showing items 21-40 of 130
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Some aspects of biological control of seed storage fungi.
(1995)Under storage conditions of ambient temperature and relative humidity in South Africa, seed-associated mycoflora proliferates. Fusarium moniliforme is ubiquitous in newly-harvested maize, persisting for variable periods ... -
Development of micropropagation protocols for selected indigenous plant species..
(1995)The herbal medicine trade is thriving in KwaZulu Natal with an ever-increasing number of people harvesting and trading in indigenous plants, especially those species with medicinal and/or magical properties. The number of ... -
The effects of sheep grazing on the recovery of succulent Karoo vegetation.
(1995)Vegetation monitoring, recording the recovery or change in plant cover over time, for several Karoo shrubs was undertaken to evaluate the Savory Grazing System on a farm in the Succulent Karoo. This evaluation was ... -
Nitrogen fixation and cycling in Natal valley bushveld Acacia species.
(1995)Five species, Acacia karroo, A. robusta, A. nilotica, A. sieberana and A. tortilis, were inoculated with Rhizobium and grown in potted sand in a temperature controlled greenhouse. After six months, results showed a ... -
The effect of elevated glutathione reductase and superoxide dismutase activities in stressed transgenic tobacco.
(1996)Life as we know it would be impossible in the absence of oxygen. However, too much oxygen can be toxic to the aerobic organisms which depend on it for their very existence. This apparent paradox arises as a result of ... -
Molecular basis of anthocyanin production in callus and cell cultures of Oxalis reclinata.
(1996)Oxalis reclinata Jacq., is a dicotyledonous plant. O. reclinata belongs to the family Oxalidaceae. This plant produced callus which accumulated red coloured anthocyanin pigments when cultured in vitro. The levels of ... -
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 ... -
Studies of transgenic tobacco plants containing Escherichia Coli glutathione reductase.
(1996)Glutathione reductase (GR) and superoxide dismutase (SOD) enzymes are thought to play an important role in the plant chloroplast antioxidant system. Tobacco plants transformed with E. coli glutathione reductase and ... -
The development of protocols for the diagnosis and micropropagation of cold-tolerant Eucalyptus cultivars.
(1996)In South Africa, Eucalyptus trees are used for many processed wood products (e.g. paper) and in the mining industry. Priorities in Eucalyptus breeding programmes include selection of varieties that are fast growers, insect ... -
The potential use of sugarcane varieties for the identification of genetic markers.
(1996)The use of genetic markers that are linked to specific traits in sugarcane has the potential to increase the efficiency of the selection of improved varieties. Conventionally, markers are identified by analysing the ... -
Aspects of the structure and functioning of the vegetation of the Hlatikulu Vlei.
(1996)Hlatikulu Vlei, situated in the foothills of the Natal Drakensberg, is one of the priority wetlands in KwaZulu-Natal, occupying an area of 733 Hectares. The importance of Hlatikulu Vlei lies in its functions to store ... -
Patterns and rate of woody vegetation cluster development in a semi- arid savanna, Natal, South Africa.
(1996)No abstract available. -
The role of overstorey proteoid shrubs in maintaining species richness in a southern Cape mountain fynbos community.
(1996)This study was conducted to determine if, and how, over storey proteoid shrubs affect the species richness of a southern Cape mountain fynbos community. Protea eximia, P. lorifolia and P. repens were the dominant ... -
Aspects of the influence of temperature on the desiccation responses of seeds of Zizania palustris (Wild rice)
(1996)Seeds of wild rice (Zizania palustris var. interior) have been reported to show highest survival when dehydrated at 25 QC. It has also been reported that axis cells sustained least damage at this drying temperature. In ... -
Aspects of seed propagation of commonly utilised medicinal trees of KwaZulu-Natal.
(1996)Due to over-exploitation of commonly-used medicinal plants, mainly from KwaZuluNatal, because of ever-increasing human population growth, many of the useful medicinal plants are becoming depleted in their natural habitats. ... -
A molecular study of y-Aminobutyric acid synthesis in Arabidopsis thaliana under abiotic stress.
(1997)y-Aminonbutyric acid (GABA) is a ubiquitous non-protein amino acid found ill many plants and organisms. GABA accumulation in plants has previously been reported as result of stresses such as water deprivation, high ... -
Uptake of Cadmium and its effect on the physiology of the liverwort Dumortiera hirsuta (SW) Nees and the moss Atrichum androgynum (CM) Jaeg.
(1997)In this thesis, the uptake kinetics of Cd by the liverwort D. hirsuta and the moss A. androgynum were investigated. In preliminary experiments, the toxicity of Cd to the bryophytes was investigated by characterising the ... -
The effect of vesicular-arbuscular mycorrhiza on the growth of two indigenous grass species Themeda triandra and Trachypogon spicatus grown on coalmine spoil topsoil.
(1997)The main project was an assessment of the effect that colonization by five different Vesicular-arbuscular mycorrhiza (VAM) cultures have on the growth of the indigenous-grasses Themeda triandra and Trachypogon spicatus, ... -
The use of a virtual world to address misconceptions held by students regarding photosynthesis and respiration.
(1998)In an effort to contribute to the improvement of Matric Biology education, a survey was conducted in 1996 and 1997 of Matric pupils and first year students at several tertiary institutions, in order to identify those topics ... -
A synfloristic comparison of Oribi Gorge and Umtamvuna Nature Reserves.
(1998)Climatic oscillation during the Quaternary resulted in fragmentation of once more continuous ancient floras and a series of invasions of different floras into the Pondoland Centre in response to climatic change, with ...