Affiliation: | 1. Department of Environmental Sciences, University of South Africa, Johannesburg, South Africa Microbiology and Environmental Biotechnology Research Group, Institute for Soil, Climate and Water, Agricultural Research Council, Pretoria, South Africa;2. Institute for Science and Technology Education, University of South Africa, Pretoria, South Africa;3. Microbiology and Environmental Biotechnology Research Group, Institute for Soil, Climate and Water, Agricultural Research Council, Pretoria, South Africa |