Browsing Masters Degrees (Botany) by Title
Now showing items 96-115 of 130
-
Recirculating hydroponic systems : evaluating cuttings yield and rooting ability of cold tolerant eucalyptus hybrids.
(2004)In South Africa, clonal forestry of Eucalyptus and its hybrids has been implemented to increase the productivity on existing forestry lands and marginal sites and to facilitate the production of desired fibre types for ... -
Regeneration failure and the Acacia karroo successional pathway in coastal dune forests in KwaZulu-Natal, South Africa.
(2007)Monospecific stands of Acacia karroo establish naturally on disturbed coastal dunes in KwaZulu-Natal, South Africa. While the A. karroo successional pathway is successful in rehabilitating mined dunes at the Richards Bay ... -
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 reproductive biology, natural enemies and biological control of Delairea odorata Lem.
(2000)Delairea odorata Lem., an asteraceous perennial vine indigenous to southern Africa, has become naturalised and invasive in many subtropical regions including California, South Australia and Hawaii. Biological control ... -
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 ... -
The role of fire in bush encroachment in Ithala Game Reserve.
(2010)The increase of woody vegetation (also known as bush or shrub encroachment) in savannas has become of global concern to conservationists and rangeland managers alike. Bush encroachment has been associated with a decrease ... -
Role of light and temperature in the flowering of Watsonia species.
(2006)The role of light and temperature on flowering of South African Watsonia species were evaluated to assess the potential for this genus as a commercial flower crop. Species were selected that represent different climatic ... -
The role of overstorey proteoid shrubs in maintaining species richness in a southern Cape mountain fynbos community.
(1996)This study was conducted to determine if, and how, over storey proteoid shrubs affect the species richness of a southern Cape mountain fynbos community. Protea eximia, P. lorifolia and P. repens were the dominant ... -
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 ...