Uptake and transformation of arsenic during the vegetative life stage of terrestrial fungi
| Autor: | Kenneth J. Reimer, Michelle M. Nearing, Iris Koch |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Agaricus
Health Toxicology and Mutagenesis chemistry.chemical_element Arsenic Compound Fungus Toxicology Arsenicals Arsenic chemistry.chemical_compound Biotransformation Botany Soil Pollutants Mycelium biology fungi Arsenate Fungi General Medicine biology.organism_classification Pollution chemistry Arsenates Arsenobetaine Agaricus bisporus |
| Zdroj: | Environmental Pollution. 197:108-115 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2014.12.006 |
| Popis: | Many species of terrestrial fungi produce fruiting bodies that contain high proportions of arsenobetaine (AB), an arsenic compound of no known toxicity. It is unknown whether fungi produce or accumulate AB from the surrounding environment. The present study targets the vegetative life stage (mycelium) of fungi, to examine the role of this stage in arsenic transformations and potential formation of AB. The mycelia of three different fungi species were cultured axenically and exposed to AB, arsenate (As(V)) and dimethylarsinoyl acetic acid for 60 days. Agaricus bisporus was additionally exposed to hypothesized precursors for AB and the exposure time to As(V) and dimethlyarsinic acid was also extended to 120 days. The mycelia of all fungi species accumulated all arsenic compounds with two species accumulating significantly more AB than other compounds. Few biotransformations were observed in these experiments indicating that it is unlikely that the mycelium of the fungus is responsible for biosynthesizing AB. |
| Databáze: | OpenAIRE |
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