Now showing items 11-20 of 92
'n Plantekologiese opname van Boschberg en sy omringende gebiede met spesiale verwysing na die weidingsfaktor.
No abstract available.
Tissue culture studies on citrus and Welwitschia.
Part I. IN VITRO CULTURE OF CITRUS EMBRYOS AND NUCELLAR ISOLATES Zygotic embryos of the Ellendale mandarin, a monoembryonic variety of citrus, were cultured on modified basal media of Murashige and Skoog (BM), and ...
Isolation and characterisation of senescence-related genes in carnations.
Senescence has been the subject of many studies, with the ultimate goal of increasing longevity of cut flowers, and for insight into the process of ageing. Senescence in the carnation is a complex phenomonen involving ...
Ultrastructure of the germinating Welwitschia mirabilis seed.
The structure and chemical composition of quiescent Welwitschia mirabilis (Hooker fil.) seeds and resultant changes occurring during the first 7 days of germination were studied. Research was focussed on the megagametophyte ...
An investigation into the potential of faecal sludge for plant production.
Abstract available in PDF file.
The interaction between endophytic Fusarium species and Eldana saccharina (Lepidoptera) following in vitro mutagenesis for F. sacchari tolerance to control the borer in sugarcane.
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 ...
Effects of some of the procedural steps of cyropreservation on cryo-recalcitrant zygotic embryos of three amaryllid species producing desiccation-sensitive seeds.
Cryopreservation is the most promising method for the long-term conservation of germplasm of plants producing desiccation-sensitive seeds. While such seeds are generally termed recalcitrant in the context of conventional ...
Micromorphology and phytochemistry of the foliar secretory structures of Stachys natalensis Hochst. and development of an in vitro propagation protocol.
Many members of the genus Stachys have been used as ornamental plants, or as edible foods and, in a number of cultures, as traditional medicine. One such species, Stachys natalensis Hochst., is a perennial, straggling shrub ...
Molecular characterisation of the gene encoding [Delta 1]-Pyrroline-5- Carboxylate Reductase isolated from Arabidopsis thaliana (L.) Heynh.
In Arabidopsis thaliana (L.) Heyhn, the size of the pool of free proline increases up to 27-fold in response to osmotic stress. The magnitude of this accumulation is dependent upon the rate of imposition of the stress. ...
Towards marker assisted selection for nematode resistance in soybean.
Meloidogyne javanica is the most widely spread nematode pest on soybean in South Africa. Only a few registered cultivars have some resistance to this nematode and there is an urgent need for an efficient breeding programme ...