Browsing Masters Degrees (Botany) by Issue Date
Now showing items 1-20 of 130
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Phytosociology of the Namib Desert Park, South West Africa.
(1976)The geology, topography, soils and climate of the Namib Desert Park south of 23 S. Lat. are described briefly. The vegetation was investigated using the techniques of the Zurich - Montpellier school of phytosociology. ... -
A contribution to knowledge of the genus Hypoxis L. (Hypoxidaceae) in Natal, South Africa.
(1976)Abstract available in PDF. -
On the vacuolar system in maize roots.
(1979)Root-cap cells of Zea mays L proliferate by division in the cap meristem, and subsequently differentiate and mature as they move towards the periphery of the cap, where ' they undergo autolysis and are sloughed. Vacuolar ... -
Lipid peroxidation and ageing in seeds of cabbage and soya bean.
(1986)It has been suggested that lipid peroxidation is involved in the loss of seed vigour, although many attempts to examine the relationships between lipid peroxidation and seed vigour have proved equivocal. Studies were ... -
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 ... -
The validity of currently recognised sectional limits within Combretum Loefling, subgenus Combretum (Combretaceae) in Southern Africa.
(1990)Taxonomic confusion associated with Combretum Loefling, subgenus Combretum (Combretaceae) resulted in this investigation into the validity of sectional limits within the subgenus in southern Africa. Eight sections, together ... -
The effect of H2O2 on the photosynthetic biochemistry of Pisum sativum.
(1990)To study the short-term effect of hydrogen peroxide on plant metabolism aminotriazole (2 mM), a catalase inhibitor was applied through the transpiration stream of pea seedlings and the gas exchange characteristics, ... -
Investigation of the processes involved during the photoinhibition of Zea mays L. seedlings.
(1990)It has been proposed that the protective systems (photorespiration, the anti-oxidant system and non-radiative energy dissipation) alleviate or reduce photoinhibitory damage under high light conditions. To investigate the ... -
The inter-relations among xylem anatomy, hydraulic conductivity and leaf water status in five sub-tropical tree species.
(1991)The wood anatomy, hydraulic properties and leaf water status of five sub-tropical plant species were studied. The specimens studied were growing in a private, irrigated garden. Consequently, any differences in xylem anatomy ... -
The effect of sun and shade on the leaves of four coastal tree species.
(1992)Mimusops caffra, Euclea netetensis, Olea woodiana and Peddiea africana are tree species associated with different successional stages in a coastal dune forest. Saplings of these tree species were established in four different ... -
Effects of nitrogen nutrition on salt stressed Nicotiana tabacum var. Samsum in vitro.
(1992)The responses of Nicotiana tabacum L. var. Samsun to alterations in the nitrogen (N) supply under saline conditions in vitro were monitored. The aim was to test the hypothesis that nitrate-nitrogen supplementation to ... -
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 ... -
A revision of the genus Ledebouria Roth (Hyacinthaceae) in South Africa.
(1993)Members of the genus Ledebouria Roth (Hyacinthaceae), which occur in South Africa, are revised. This genus occurs throughout Africa, India and Madagascar. 33 Species are recognized and placed into nine provisional infrageneric ... -
Production and physiological responses of Italian ryegrass and white clover grown in mono cultures and mixed stands.
(1993)The aim of this study was to test the hypothesis that ryegrass and clover, when grown under optimal conditions in mixed stands, interact in response to available light energy. with other resources non-limiting, pasture ... -
Regulation of nitrate reductase during in vitro differentiation of nicotiana tabacum L. var. samsun.
(1993)The commencement of in vitro differentiation is mediated by genetic changes that result in selective expression of genes and a shift in metabolism. The role of nitrate reductase, a key enzyme of nitrate assimilation, during ... -
The development of regeneration and transformation systems for Eucalyptus spp.
(1994)In South Africa, Eucalyptus breeding programmes are aimed at the selection of fastgrowing varieties, with appropriate wood characteristics and/or resistance to pests and diseases. However, the slow growth rate, long ... -
The potential of hot water treatments for curtailing seed-associated mycoflora.
(1995)The consequences of toxigenic fungi associated with stored seed have stimulated these investigations aimed at developing treatments to minimise this mycoflora, without significantly reducing seed quality or viability. ... -
Transformation of potatoes with the potato leafroll virus coat protein gene.
(1995)Potato leafroll virus (PLRV) is one of the most destructive potato viruses in South Africa. In order to establish resistance against PLRV in commercial potato cultivars, the coat protein (CP) gene of the virus was ... -
Another culture of Solanum genotypes.
(1995)Being the third most cultivated crop in South Africa, potatoes are of great economic importance. As potatoes originated from cooler areas in the world, they do not easily adapt to South African conditions. The main ...