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Theses and Dissertations (Microbiology and Plant Pathology): Recent submissions
Now showing items 21-40 of 372
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(University of Pretoria, 2013)The etiological agent of rabies, rabies virus, is a member of the fatal Lyssavirus genus that accounts for the death of more than 55 000 humans per annum, with the number of infected animals far exceeding that number. The ...
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(University of Pretoria, 2015)Pantoea ananatis causes disease symptoms in a wide range of economically important plants such as Eucalyptus, maize and onions. This study specifically focussed on the interactions of P. ananatis LMG20103 with onion seedlings ...
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(University of Pretoria, 2011)The genus Euphorbia consists of a group of plants with a diverse morphology occurring all over the world. In South Africa species of the succulent Euphorbia trees are mostly found in the Northern provinces with Euphorbia ...
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(University of Pretoria, 2014)Escherichia coli (E. coli) is an indicator of faecal contamination as it is assumed that faecal contamination is the main source of these bacteria in the environment. Recent studies have, however, shown that E. coli can ...
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(University of Pretoria, 2014)Plant growth promoting rhizobacteria (PGPR) are bacteria that colonize the volume of soil surrounding plant roots (known as the rhizosphere) which, when in association with a suitable host plant, promote plant growth. The ...
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(University of Pretoria, 2020)Bacterial canker is among the most common bacterial diseases affecting the production of stone fruit trees in South Africa. As reported in previous studies, the causal agents associated with bacterial canker of stone fruit ...
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(University of Pretoria, 2020)Several members of the soft rot Pectobacteriaceae family such as Pectobacterium brasiliense 1692 (Pb1692) attack a wide range of crops worldwide. P. brasiliense is a major cause of black leg and soft rot disease in several ...
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Investigation of the microbial community composition and functional potential in Namib Desert soils (University of Pretoria, 2020)Deserts constitute one-fifth of the Earth’s total surface area and represent one of the harshest environments. Soil microbial communities are considered the dominant ecological drivers of these ecosystems as they are major ...
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(University of Pretoria, 2020)The trans-encoded small RNAs (sRNAs) are novel gene expression regulators in bacteria. In response to external stimuli, sRNAs rapidly modulate the expression of genes at the post-transcriptional level to allow bacteria to ...
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(University of Pretoria, 2019)Citrus greening disease (CG) in South Africa is associated with the phloem-limited bacterium, ‘Candidatus Liberibacter africanus’ (Laf). This disease has been known to cause yellowing leaf symptoms as well as the formation ...
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(University of Pretoria, 2019)Plant growth promoting rhizobacteria (PGPR) are those bacteria that colonise the rhizosphere of various plants and promote growth either directly by improving nutrient uptake by the plant roots or indirectly through the ...
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Elucidating the gut microbiomes of healthy South African individuals from rural and urban localities (University of Pretoria, 2019)The diversity and functional potential of the gut bacterial community of healthy South African individuals are not well understood. This study investigated the gut microbiomes of two populations: individuals living in rural ...
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(University of Pretoria, 2020)Pectobacterium carotovorum subsp. brasiliense 1692 is an economically important pathogen as it causes soft rot and blackleg of numerous agricultural crops, especially potato, in South Africa and in other parts of the ...
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(University of Pretoria, 2019)Non-rutaceous plant species, potentially hosts to ‘Candidatus Liberibacter africanus’ (Laf) sensu lato, were sampled throughout the Cape Floristic Region from the Fynbos and Succulent Karoo biomes in South Africa, and ...
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(University of Pretoria, 2020)The biodiversity in the Cape Floristic Region of South Africa faces many threats from anthropogenic sources such as the trade associated with our globalized economy. Aggressive plant pathogens in the genus Phytophthora are ...
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(University of Pretoria, 2019)Grapevine leafroll disease (GLD) is recognised as a global, economically significant viral disease of grapevines. The complex of viruses associated with GLD are termed the Grapevine leafroll associated viruses (GLRaVs) and ...
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(University of Pretoria, 2019)Consumers have become more aware of the importance of consuming foods and products that boost health. This is one of the reasons why the probiotic industry has been booming for the past several decades. Clinical studies ...
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(University of Pretoria, 2020)Two component systems (TCSs) are one of the predominant methods for bacteria to detect and respond to environmental change. A typical TCS consists of a histidine kinase (HK), responsible for sensing inter- and intracellular ...
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(University of Pretoria, 2020)The Repeat-Induced Point (RIP) mutation pathway is a fungal-specific genome defence mechanism that mitigates the deleterious consequences of repeated motifs and transposable elements (TEs). RIP is an ancient pathway that ...
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(University of Pretoria, 2020-06)Listeria monocytogenes is a foodborne pathogen that causes listeriosis. This study investigates the prevalence of L. monocytogenes in food samples acquired from retail stores and street vendors around Pretoria and evaluates ...
Now showing items 21-40 of 372