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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
pharmacology, toxicology and pharmaceutics
The use of Lepidium sativum in a plant bioassay system for the detection of microcystin-LR
Toxicon, Volume 41, No. 7, Year 2003
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Description
Toxin-producing cyanobacteria pose a worldwide health threat to humans and animals due to their increasing presence in both drinking and recreational waters. Detection of microcystins in water generally relies on specialised equipment and a delay of several days for transport and analysis. Little work has, however, been done on establishing a simple, cost-effective and sensitive plant bioassay for the detection of microcystin-LR (MCLR) in water at the WHO Tolerable Daily Intake guideline level of 1 μg/l. We investigated the effect of a MCLR extract at 1 and 10 μg/l on the growth of Lepidium sativum over 6 days. Exposure to 10 μg/l MCLR resulted in a significant decrease in root and leaf lengths and fresh weights of seedlings when compared to the controls. These results were consistent with seedlings exposed to pure MCLR at 10 μg/l. Seedlings exposed to 1 μg/l MCLR showed a significant decrease in root development from day 2 to day 6. Glutathione S-transferase and glutathione peroxidase activities were also significantly raised in plants from days 5 and 4, respectively, at both toxin levels investigated. © 2003 Elsevier Science Ltd. All rights reserved.
Authors & Co-Authors
Gehringer, Michelle M.
South Africa, Gqeberha
Nelson Mandela University
Kewada, Vijayne
South Africa, Gqeberha
Nelson Mandela University
Coates, Nadya
South Africa, Gqeberha
Nelson Mandela University
Downing, Timothy Grant
South Africa, Gqeberha
Nelson Mandela University
Statistics
Citations: 90
Authors: 4
Affiliations: 1
Identifiers
Doi:
10.1016/S0041-0101(03)00049-7
ISSN:
00410101
Research Areas
Environmental