Browsing Masters Degrees (Botany) by Title
Now showing items 104-123 of 130
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Screening of traditionally used South African medicinal plants against Candida albicans.
(2003)Candida species were discovered more than a century ago as a causative organism of oral thrush. In HIV patients, the presence of oral candidiasis has been shown to be the earliest opportunistic infection. Candidiasis ... -
Seasonal pharmacological and phytochemical properties of medicinal bulbs.
(2010)Medicinal bulbs form part of the diversified flora in South Africa. The plants are used extensively in South African traditional medicine in the treatment of various ailments. Due to the ever-increasing demand and the ... -
The secretory apparatus of Ceratotheca triloba (Pedaliaceae) : morphology and chemical composition of the secretion.
(2012)Ceratotheca triloba (Bernh.) E. Mey. ex Hook. f., commonly known as the wild foxglove, is a fast growing annual that is indigenous to southern Africa. The surface of the plant is covered with fine, hair-like trichomes, ... -
Seed germination and medicinal properties of Alepidea species.
(2009)The rhizomes of Alepidea amatymbica and Alepidea natalensis are used for medicinal purposes. Because of the increase in demand for these plants the species is becoming scarce. As the seed biology of neither species is well ... -
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 ... -
Some aspects of megagametophyte development and post-shedding seed behaviour of Encephalartos natalensis (Zamiaceae)
(2009)Very little is known about the post-shedding seed behaviour and megagametophyte development of the cycads, the most primitive extant seed-bearing plants, which pre-date the dinosaurs. In the present investigation, seeds ... -
Some investigations of the responses of Quercus robur and Ekebergia capensis embryonic axes to dehydration and cryopreservation.
(2000)Recalcitrant seeds are those that are shed at high water contents, are actively metabolic throughout development, when they are, and remain, desiccation-sensitive, and may also be chilling sensitive. These properties ... -
Some investigations towards the cryopreservation of sugarcane germplasm.
(2009)Sugarcane has become an increasingly important crop in recent years, with South Africa featuring as one of the prominent producers. This has led to a significant growth in the South African sugarcane industry, translating ... -
Some invetsigations on the responses to desiccation and exposure to cryogenic temperatures of embryonic axes of Landolphia kirkii.
(2011)Landolphia kirkii is scrambling shrub forming an integral part of the flora along the coastal areas of north-eastern South Africa. The non-sustainable harvesting of fruit as food source, by monkeys and rural communities ... -
Storage of frequently used traditional South African medicinal plants.
(2003)The post-harvest physiology of nine frequently used indigenous southern African medicinal plants was investigated, in particular the effects of storage time and accelerated ageing on the biological activity and chemical ... -
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 ... -
A study of some chilling responses of recalcitrant seeds of Avicennia marina (Forssk.) Vierh. and Ekebergia capensis Sparrm.
(2002)Seeds remain the most convenient and successful way for storing the genetic diversity of plant species and for producing new plants routinely for agriculture and horticulture. The importance of seed storage and the ability ... -
Survival and rooting of selected vegetatively propagated Eucalyptus clones in relation to supplied auxin.
(2013)Eucalyptus spp. and hybrids dominate the global plantation forestry industry, and vegetative propagation through cuttings is the preferred method for their commercial use. However, the cuttings of some species and hybrids ... -
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 ... -
Systematics of Bonatea (Orchidaceae) : species boundaries and phylogeny.
(2006)Bonatea Willd. (Orchidaceae: Habernariinae) is a small genus confined to the African continent and Arabia. Phylogenetic and morphometric analyses were undertaken in order to evaluate phylogenetic relationships and species ... -
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. ...