A single microcystin in a toxicMicrocystisbloom from the river Río de la Plata (Argentina)
| Autor: | Francisca F. del Campo, María Cristina Zaccaro, Mónica Storni, Ana María Stella, Juan C. Bossio, Marian Tanuz, Gloria Zulpa, Youness Ouahid |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Cyanobacteria High concentration Molecular mass biology Ecology Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Soil Science Microcystin biology.organism_classification Pollution Analytical Chemistry Amino acid chemistry Microcystis Botany Environmental Chemistry Microcystis aeruginosa Bloom Waste Management and Disposal Water Science and Technology |
| Zdroj: | International Journal of Environmental Analytical Chemistry. 91:525-536 |
| ISSN: | 1029-0397 0306-7319 |
| DOI: | 10.1080/03067310903359492 |
| Popis: | Microcystis is one of the most common bloom-forming cyanobacteria genera in diverse ecosystems. More than 80% of its strains are toxic, mainly due to their ability to produce metabolites known as microcystins (MC). Here we report on a M. aeruginosa bloom that appeared in the summer of 2001 at a site of the Rio de la Plata, within the city of Buenos Aires. The symptoms in mice indicated that the bloom was hepatotoxic. LC-PDA analysis revealed a similar high concentration (0.9–1 mg g–1 d w) of just one MC in the bloom biomass during the 3-month study period. During this period most of the MC (ca. 98 %) was found intracellularly, and the content remained almost the same. The molecular mass of the bloom MC was 1036 Da, as deduced from LC-ESI-MS data. Fragment ion analysis by LC-IT-MS-MS allowed identifying 6 out of the 7 amino acids, as well as their position in the molecule. The molecular mass of the unidentified amino acid residue was 155 Da. According to the data obtained, the MC under study was MC-XR, X r... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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