Browsing Botany by Title
Now showing items 33-52 of 261
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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 ... -
A contribution to the taxonomy of Bolboschoenus (Cyperaceae), with particular reference to fruit morphology and the African species.
(1998)Using the Scanning Electron Microscope (SEM), fruit surface and pericarp anatomy were investigated in the African species of Bolboschoenits (Ascherson) Palla [B. maritimus (L.) Palla; B. glaucus (Lam.) S.G. Smith; B. ... -
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 ... -
Cytokinins in Ecklonia maxima and the effect of seaweed concentrate on plant growth.
(1984)The endogenous cytokinin levels in the brown alga Ecklonia maxima (OSBECK) PAPENF., and the effect of applications of the seaweed concentrate (Kelpak 66) prepared from this alga, on the growth and yield of various ... -
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 ... -
Desiccation tolerance and sensitivity of vegetative plant tissue.
(1995)There is a great deal of work currently being done in the field of desiccation tolerance. Generally workers studying desiccation-tolerant plant tissues have concentrated on the mechanisms of desiccation tolerance without ... -
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. ... -
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 ... -
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 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 ...