Author:Midgley, JJDate:May 1993There are cape Asteraceae species that have conspicuous dark markings on their ray florets. Such markings are usually interpreted as guides of various sorts. It is thus suggested that the dark raised marks on the ray florets of Gorteria diffusa ...Read more
Author:Berger, DK; Oelofse, D; Arendse, MS; Du Plessis, E; Dubery, IADate:Jul 2000Stenocarpella maydis, a fungal pathogen of maize, produced polygalacturonases (PGs) when grown on pectin or maize cell walls. An extract from bean (Phaseolus vulgaris L.) which contained an active inhibitor of Aspergillus niger PG, also ...Read more
Author:Geldenhuys, CJDate:May 1997Patterns in species richness of 23 small, isolated forests on the inland mountains of the southern Cape were studied. Species richness of woody plants and vines of the Kouga-Baviaanskloof Forests was higher than in the western mountain ...Read more
Author:Netshiluvhi, TRDate:Dec 1999Short-listing of medicinal tree species for propagation was done through three criteria; number of bags sold, price per bag and mean scarcity value. There is a strong correlation between the mean scarcity values and number of bags sold per ...Read more
Author:Oldach, KH; Morgenstern, A; Rother, S; Girgi, M; O'Kennedy, Maretha M; Lorz, HDate:Jul 2001The authors report an in vitro culture system that provides reliable, highly efficient regeneration from immature embryos of pearl millet [Pennisetum glaucum (L.) R. Br.] and sorghum [Sorghum bicolor (L.) Moench]. Immature embryos were isolated ...Read more
Author:Geldenhuys, CJDate:Feb 1993An annotated list of species recorded in the forests of the southern Cape is provided. The flora comprises 470 species which belong to 280 genera and 106 families (50 monogeneric families, 32 monospecific families and 193 monospecific genera). ...Read more
Author:O'Kennedy, Maretha M; Burger, JT; Botha, FCDate:Apr 2004Fertile transgenic pearl millet plants expressing a phosphomannose isomerase (PMI) transgene under control of the maize ubiquitin constitutive promoter were obtained using the transformation system described here. Proliferating immature zygotic ...Read more
Author:Ma, JKC; Chikwamba, Rachel K; Sparrow, P; Fischer, R; Mahoney, R; Twyman, RMDate:Dec 2005Plant-derived pharmaceuticals are poised to become the next major commercial development in biotechnology. The advantages they offer in terms of production scale and economy, product safety, ease of storage and distribution cannot be matched ...Read more
Author:Le Maitre, David CDate:2004The adverse impacts of invading alien organisms are widely recognized as one of the major threats to biodiversity and are receiving growing recognition as a major socioeconomic threat. The hydrological impacts of alien plants have received ...Read more
Author:Mundree, S; Perissinotto, R; Nozais, CDate:2003A 12-month survey investigated seasonal variations in the vertical distribution of benthic microalgal biomass in relation to major factors potentially controlling their dynamics in the subtropical temporarily open Mdloti Estuary, KwaZulu ...Read more
Author:Ncube, EN; Steenkamp, Paul A; Madala, NE; Dubery, IADate:Sep 2016Centella asiatica is a perrenial herb that grows in tropical regions with numerous medicinal properties mostly attributed to the presence of pentacyclic triterpenoids. Interestingly, this plant also possess a significant amount of ...Read more
Author:O'Kennedy, Maretha M; Burger, JT; Berger, DKDate:Dec 2001Elite white maize lines W506 and M37W were transformed with a selectable marker gene (bar) and a reporter gene (uidA) or the polygalacturonase-inhibiting protein (pgip) gene after bombardment of cultured immature zygotic embryos using the ...Read more
Author:Girgi, M; O'Kennedy, Maretha M; Morgenstern, A; Mayer, G; Lorz, H; Oldach, KHDate:2002Four different pearl millet breeding lines were transformed and led to the regeneration of fertile transgenic plants. Scutellar tissue was bombarded with two plasmids containing the bar selectable marker and the beta-glucuronidase reporter ...Read more
Author:Scholes, RJ; Dowty, PR; Caylor, K; Parsons, DAB; Frost, PGH; Shugart, HHDate:Jun 2002The Kalahari sand sheet occupies 2.5 million ha in southern Africa. It is an area with relatively similar deep Aeolian soils, and a strong south to north gradient in rainfall, from 200 to 1000 mm mean annual precipitation (MAP) in the region ...Read more