In a major boost for indigenous knowledge and pharmaceutical science, Dr Sipho Patrick Goge has officially graduated with a PhD in Botany from the University of Fort Hare (UFH). Dr Goge, who began his doctoral journey at the Alice campus’s Faculty of Science and Agriculture in 2020, officially completed his studies in November 2025 before walking the graduation stage on 6 May 2026.
Dr Goge’s research provides the first extensive scientific validation for how geographic and climatic variations affect the healing properties of Aloe ferox (bitter aloe), one of South Africa’s most treasured indigenous medicinal plants.
Working under the supervision of Associate Professor LV Komoreng and co-supervisors Professor RM Coopoosamy and Professor LA Adeniran, Dr Goge’s thesis is titled: “Effects of geographic variations on biological activity and chemical profile of Aloe ferox Mill, from KwaZulu-Natal, Eastern Cape, and Free State provinces, Republic of South Africa.” The study set out to discover whether differences in climate and environment across three ecologically distinct provinces influence the therapeutic properties and safety of the plant.
The study unearthed some key findings, some of which are the rich chemical profile of the plant. The phytochemical screening revealed that Aloe ferox maintains a rich and relatively consistent baseline of bioactive compounds across all three provinces, including alkaloids, flavonoids, phenols, saponins, and terpenoids. In KwaZulu-Natal the samples showed antimicrobial edge. While the chemical building blocks are similar, regional environment matters. Ethanol extracts showed the strongest overall antibacterial and antifungal effects, with samples harvested from KwaZulu-Natal exhibiting the highest antimicrobial efficacy. The study also revealed safety profile. It showed that the cytotoxicity assessments proved that the extracts are of low toxicity and relatively safe for use. Samples from the Free State demonstrated the lowest lethal concentration ($LC_{50}$) values while remaining completely non-lethal.
Dr Goge’s findings have profound implications for public health, conservation, and local economies. By proving that the plant’s biological strength varies by region, his research bridges the gap between traditional rural practices and evidence-based medicine. The findings provide a framework for sustainable harvesting, ensuring that wild populations of Aloe ferox are not depleted. Also, by establishing guidelines for quality control and value addition, the research supports the responsible commercialisation of the plant.
This PhD is the latest milestone in a historic academic career for Dr Goge. He is an alumnus of the Mangosuthu University of Technology (MUT), where in 2018 he attained a Master of Nature Conservation. Dr Goge has since returned to his roots to inspire the next generation of scientists. Since 2024, he has been attached to MUT’s Faculty of Applied Health and Sciences, serving in the Department of Nature Conservation.