Browsing Masters Degrees (Botany) by Title
Now showing items 119-130 of 130
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A taxonomic revision of the tribe Desmodieae (Leguminosae - Papilionoideae)
(1984)The tribe Desmodieae has a pantropical distribution and is one of the most advanced tribes in the subfamily Papilionoideae. Despite this fact, the tribe was already present in the fossil record of the early Tertiary and ... -
The effect of developmental status and excision injury on the success of cryopreservation of germplasm from non-orthodox seeds.
(2007)The zygotic germplasm of plant species producing desiccation-sensitive seeds can be conserved in the long-term only by cryopreservation. Usually the embryonic axis is excised from the cotyledons and is used as the explant ... -
Towards developing effective decontamination procedures for in vitro culture of embryonic axes excised from recalcitrant seeds.
(2013)Control of seed-associated micro-organisms is vital in reducing losses of plants of economic importance. Recalcitrant seeds being metabolically active and able to be stored only under conditions of high relative humidity ... -
Towards development of a cryopreservation protocol for germplasm of Podocarpus henkelii.
(2012)The trees belonging to the genus Podocarpus, of which only four species are native to South Africa, are renowned for their superior quality timber. Prior to 1880, Podocarpus henkelii, together with P. falcatus and P. ... -
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 ... -
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 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 ... -
User attitudes to conservation and management options for the Ongoye Forest Reserve, KwaZulu-Natal, South Africa.
(2005)Indigenous forest resources are valuable to communities situated around them as they provide many different resources for their livelihoods. South Africa has only 0.5% of indigenous forest cover and most forests are ... -
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 ... -
Vegetation change in Northern KwaZulu-Natal since the Anglo-Zulu war of 1879.
(2013)Historic photographs have been successfully used to compare landscape change over time. I used photographs taken of the grassland biome during and just after the Anglo-Zulu War (1879) in KwaZulu-Natal (South Africa), which ...