Browsing Botany by Title
Now showing items 87-106 of 261
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Heavy metals in South African medicinal plants.
(2008)Plants are able to take up and accumulate certain environmental contaminants such as heavy metals. When the plants are ingested by man, these contaminants are transferred along the food chain. Due to the poorly regulated ... -
Hormonal regulation of tuberization of cassava (Manihot esculenta Crantz)
(1984)The relative distribution of dry matter over shoot and tuberous roots is an important factor in determining the yield of cassava. Under sub-tropical conditions the dry matter distribution pattern is not always efficient. ... -
Host specificity of the hemiparasitic mistletoe, Agelanthus natalitius.
(2009)Mistletoes are a group of hemiparasitic plants that grow on a wide variety of host trees and differ in their degree of host specificity, ranging from specialists to generalists. Mistletoes can also be locally host specific ... -
How do alien plants invade : an analysis of the historical spread and potential distribution of the invasive alien plant Chromolaena odorata in and around Hluhluwe Game Reserve.
(2009)Alien plant invasions and human-induced land transformations are the two most important factors contributing to loss of biodiversity, and Chromolaena odorata (C. odorata) is one of the world’s worst invader plants. It ... -
In vitro bulb induction in Eucomis zambesiaca Baker.
(2009)Eucomis L’ Hér. is a genus of 10 species that fall within the Hyacinthaceae family. Eucomis zambesiaca Baker is a summer-blooming bulbous geophyte occurring from northern South Africa to Malawi. Eucomis species are used ... -
In vitro culture and genetic transformation of selected ancestral and commercial sugarcane germplasm.
(2013)Sugarcane is an economically important crop and its high demand has necessitated the use of biotechnology methods to produce and accelerate the production of desirable genotypes. One such method is genetic transformation. ... -
In vitro generation of somaclonal variant plants of sugarcane (Saccharum spp. hybrids) for tolerance to toxins produced by Fusarium sacchari.
(2012)The fungus Fusarium sacchari (Butler) Gams causes stem rot in sugarcane especially in association with the stem borer Eldana saccharina Walker. Sugarcane plants tolerant to F. sacchari PNG40 were obtained by chemical ... -
In vitro propagation of Dierama erectum.
(2009)Dierama is a genus of plants with a potential to be developed as ornamental plants. It falls under the Iridaceae family and comprises of 44 species. Dierama erectum Hilliard, an attractive species with horticultural potential ... -
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 ... -
In vitro propagation of Scilla natalensis planch.
(1999)In South Africa, large quantities of Scilla natalensis are harvested from wild populations and sold as traditional medicine, which is reducing the density, distribution and genetic diversity of wild populations. The ... -
In vitro regeneration and secondary metabolites in cyrtanthus species.
(2013)Perennial geophytes form part of the diversified flora in southern Africa. The traditional medicinal system, integrates various plant components in the treatment of diverse ailments. In South Africa, bulbs are part of the ... -
In vitro studies and phytocompound analysis in Lessertia frutescens (Fabaceae)
(2011)The cancer bush (Lessertia frutescens L.) is an important leguminous perennial native to southern Africa and has been used for centuries in traditional medicine by the continent’s diverse cultural groups. Like many other ... -
In vitro techniques for the improvement of growth and secondary metabolite production in Eucomis autumnalis subspecies autumnalis.
(2014)The wide utilization and popularity of medicinal plants in African Traditional Medicine (ATM) has been recognized and attributed to the effectiveness, affordability and accessibility of these medicinal plants. However, the ... -
The influence of root chilling on the hydraulic characteristics of selected Eucalyptus taxa.
(2008)The hydraulic conductance of a plant is a significant factor in determining the -
The influence of the monocarpic herb, Isoglossa woodii, on subtropical forest tree dynamics and diversity.
(2009)Dominant understorey species, such as herbs, ferns, palms and shrubs may influence forest tree species diversity and dynamics. Their influence may be through shading the forest floor, thereby affecting regeneration of ... -
The influence of vegetation control on the growth and pulping properties of a eucalyptus grandis x camaldulensis hybrid clone.
(1999)In order to determine if weed control as practised during the establishment phase of tree growth had a beneficial and long term (over a six to eight year rotation) impact on tree performance, a Eucalyptus hybrid clone ... -
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 interaction between endophytic Fusarium species and Eldana saccharina (Lepidoptera) following in vitro mutagenesis for F. sacchari tolerance to control the borer in sugarcane.
(2015)Eldana saccharina is a major pest in the South African sugar industry. Stalk damage by this borer and infection of bored tissue by opportunistic fungi result in loss of biomass and sucrose content, respectively. Amongst ... -
An investigation into in vitro culture and phytochemical aspects of some members of the order Cycadales.
(1988)The present-day cycads represent the diverse, modified remnants of a much larger group of gymnosperms which flourished in the Mesozoic Era. The approximately 148 surviving species of the Cycadales are sparsely distributed ... -
An investigation into the biology and medicinal properties of Eucomis species.
(1999)Eucomis (Family Hyacinthaceae) are deciduous geophytes with long, narrow leaves and erect, densely packed flower spikes. The bulbs are greatly valued in traditional medicine for the treatment a variety of ailments, and ...