1 Natural History Museum of Denmark, Faculty of Science, Københavns Universitet2 Department of Drug Design and Pharmacology, Faculty of Pharmaceutical Sciences, Københavns Universitet3 Natural Products and Peptides, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, Københavns Universitet4 Natural Products and Peptides, Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, Københavns Universitet5 Natural History Museum of Denmark, Faculty of Science, Københavns Universitet
Tulbaghia species are used in traditional medicine in southern Africa. They contain sulphur compounds, which have anti-Candida activity. The sulphur compounds are unstable, so different extraction methods were investigated. Grinding the rhizome material in liquid nitrogen and extraction with ethanol yielded the best results. Eight Tulbaghia species were tested and found to contain the same pattern of sulphur compounds on the TLC plate, though in varying concentrations, except T. simmleri, for which sulphur compounds could not be detected. This means that more species can potentially be utilised for the drug Tulbaghiae rhizoma. A simple quantitative TLC dilution method was developed, which can be used to ascertain whether the rhizome material contains a sufficient level of sulphur compounds. The effect of storage was investigated. The content of sulphur compounds in the rhizomes decreased fast upon storage, half of the main compound was lost four weeks after harvest. Possible adulterants for Tulbaghiae rhizoma are Allium sativum and Agapanthus campanulatus. It was not possible to detect adulteration with A. sativum, but a simple TLC test could detect adulteration with 10 % A. campanulatus material.
South African Journal of Botany, 2012, Vol 82, p. 92-98
The Faculty of Science; The Faculty of Pharmaceutical Sciences