Spatial variation of epoxyscillirosidine concentrations in Moraea pallida (yellow tulp) in South Africa

Show simple item record Botha, C.J. (Christoffel Jacobus) Coetser, Heleen Schultz, R.A. (Rowena Anitra) Labuschagne, Leonie Van der Merwe, Deon 2013-09-13T08:56:45Z 2013-09-13T08:56:45Z 2013-05-31
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dc.description.abstract Moraea pallida (yellow tulp) poisoning is economically the most important intoxication of livestock in South Africa. Poisoning varies according to locality, climatic conditions and growth stage of the plant. The primary objective of this study was to determine the concentration of the toxic principle, epoxyscillirosidine, in yellow tulp leaves and to ascertain the variability of epoxyscillirosidine concentrations within and between different locations. A secondary objective was to utilise Geographic Information Systems in an attempt to explain the variability in toxicity. Flowering yellow tulp plants were collected at 26 sampling points across 20 districts of South Africa. The leaves of five plants per sampling point were extracted and submitted for liquid chromatography/mass spectrometry analysis. A large variation in mean epoxyscillirosidine concentrations, ranging from 3.32 μg/g – 238.27 μg/g, occurred between different geographical regions. The epoxyscillirosidine concentrations also varied tremendously between individual plants (n = 5) collected at the same sampling point, with up to a 24 times difference between the lowest and highest concentration detected. No generalised correlation between epoxyscillirosidine concentrations and soil elemental concentrations could be established. However, samples obtained from the north-eastern part of the sampling region tended to have higher epoxyscillirosidine concentrations compared to samples obtained from the south-western part of the sampling region. Higher toxin concentrations in the northeast were associated with statistically significant higher soil concentrations of iron, bismuth, bromide, cadmium, chromium, rubidium, tellurium, thallium, titanium and zinc, whilst soil concentrations of strontium and soil pH, were significantly lower. This study corroborated the contention that epoxyscillirosidine concentration in yellow tulp fluctuates and may explain the variability in toxicity. en
dc.description.librarian am2013 en
dc.description.librarian mn2013
dc.description.uri en
dc.identifier.citation Botha, C.J., Coetser, H., Schultz, R.A., Labuschagne, L. & Van der Merwe, D., 2013, ‘Spatial variation of epoxyscillirosidine concentrations in Moraea pallida (yellow tulp) in South Africa’, Onderstepoort Journal of Veterinary Research 80(1), Art. #543, 6 pages. 10.4102/ojvr.v80i1.543 en
dc.identifier.issn 0030-2465 (print)
dc.identifier.issn 2219-0635 (online)
dc.identifier.other 10.4102/ojvr.v80i1.543
dc.identifier.other 7006558662
dc.identifier.other O-5991-2014
dc.language.iso en en
dc.publisher AOSIS Open Journals en
dc.rights © 2013. The Authors. Licensee: AOSIS OpenJournals. This work is licensed under the Creative Commons Attribution License. en
dc.subject Moraea pallida (yellow tulp) en
dc.subject Epoxyscillirosidine concentrations en
dc.subject Toxicity en
dc.subject.lcsh Plant poisoning in animals en
dc.title Spatial variation of epoxyscillirosidine concentrations in Moraea pallida (yellow tulp) in South Africa en
dc.type Article en

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