The Sun-spot Period

Edmonds, Fran

doi:10.1038/026292a0

Cited by 7 publications

(4 citation statements)

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“…E-mail: juergen.mattusach@ufz.de for growth. 5 -7 Marine animals, such as mussels, lobsters and crabs, convert arsenic into harmless arsenobetaine and arsenocholine 8 and, therefore, possess an effective detoxification mechanism for ingested toxic inorganic arsenic. Other non-toxic metabolites of arsenic have been found in marine algae, i.e.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of arsenic species on the nitrogen metabolism of a model angiosperm: nasturtium,Tropaeolum majus

Schmidt

Mattusch

Reißer

et al. 2005

Appl. Organometal. Chem.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of arsenic species on the nitrogen metabolism of a model angiosperm: nasturtium,Tropaeolum majus

Schmidt

Mattusch

Reißer

et al. 2005

Appl. Organometal. Chem.

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“…more highly evolved) 10 is similar to that of arsenobetaine in higher marine organisms, such as marine animals. 11 It has been proposed that the fungi producing the mushrooms are responsible for the biosynthesis of more complex arsenic forms, such as arsenobetaine. 10 This theory is favored for two reasons.…”

Section: Introductionmentioning

confidence: 99%

Arsenic species in terrestrial fungi and lichens from Yellowknife, NWT, Canada

Koch

Wang

Reimer

et al. 2000

Appl. Organometal. Chem.

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Levels of total arsenic and arsenic species were determined in fungi collected from Yellowknife, NWT, Canada, an area that has been affected by past mining activities and elevated arsenic levels. Lichens (belonging to Cladonia and Cladina genera), as well as the mushrooms Coprinus comatus, Paxillus involutus, Psathyrella candolleana and Leccinum scabrum, were studied for the first time. Most of the fungi contained elevated arsenic levels with respect to data found in the literature for background levels. Minor amounts of arsenobetaine were found in all lichen samples. The major water‐soluble arsenic species in the fungi were inorganic arsenic for lichens and Psathyrella candolleana, arsenobetaine for Lycoperdon pyriforme and Coprinus comatus, and dimethylarsenate for Paxillus involutus and Leccinum scabrum. A large proportion of water‐soluble arsenic in Paxillus involutus occurred as an unknown compound, which did not co‐chromatograph with any of the available standard arsenic compounds. Low proportions of water‐soluble arsenic species (made evident by low extraction efficiencies) were observed in the majority of fungi studied. Arsenic that is not extracted may be bound to lipids, cell components or proteins, or might exist on the surface of the fungus as minerals. Copyright © 2000 John Wiley & Sons, Ltd.

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“…Most of the relatively high concentrations of arsenic in seafood are present, however, as organoarsenic compounds of low toxicity, and the inorganic forms usually constitute only a few per cent of the total. 1 The organoarsenic compounds present include dimethylarsinylriboside derivatives ('AsSugars') which are the predominant form of arsenic in shellfish, 2,3 and arsenobetaine (AsB), which is the dominating chemical form in fish and crustaceans. [4][5][6] Arsenic is generally present at much lower concentrations in foods of terrestrial origin than in seafood.…”

Section: Introductionmentioning

confidence: 99%

Speciation and health risk considerations of arsenic in the edible mushroom Laccaria amethystina collected from contaminated and uncontaminated locations

Larsen

Hansen

Gössler

1998

Applied Organom Chemis

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Samples of the edible mushroom Laccaria amethystina, which is known to accumulate arsenic, were collected from two uncontaminated beech forests and an arsenic‐contaminated one in Denmark. The total arsenic concentration was 23 and 77 μg As g−1 (dry weight) in the two uncontaminated samples and 1420 μg As g−1 in the contaminated sample. The arsenic species were liberated from the samples using focused microwave‐assisted extraction, and were separated and detected by anion‐ and cation‐exchange high‐performance liquid chromatography with an inductively coupled plasma mass spectrometer as arsenic‐selective detector. Dimethylarsinic acid accounted for 68–74%, methylarsonic acid for 0.3–2.9%, trimethylarsine oxide for 0.6–2.0% and arsenic acid for 0.1–6.1% of the total arsenic. The unextractable fraction of arsenic ranged between 15 and 32%. The results also showed that when growing in the highly arsenate‐contaminated soil (500–800 μg As g−1) the mushrooms or their associated bacteria were able to biosynthesize dimethylarsinic acid from arsinic acid in the soil. Furthermore, arsenobetaine and trimethylarsine oxide were detected for the first time in Laccaria amethystina. Additionally, unidentified arsenic species were detected in the mushroom. The finding of arsenobetaine and trimethylarsine oxide in low amounts in the mushrooms showed that synthesis of this arsenical in nature is not restricted to marine biota. In order to minimize the toxicological risk of arsenic to humans it is recommended not to consume Laccaria amethystina mushrooms collected from the highly contaminated soil, because of a genotoxic effect of dimethylarsinic acid observed at high doses in animal experiments. © 1998 John Wiley & Sons, Ltd. No Abstract.

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The Sun-spot Period

Cited by 7 publications

References 0 publications

Evaluation of the influence of arsenic species on the nitrogen metabolism of a model angiosperm: nasturtium,Tropaeolum majus

Evaluation of the influence of arsenic species on the nitrogen metabolism of a model angiosperm: nasturtium,Tropaeolum majus

Arsenic species in terrestrial fungi and lichens from Yellowknife, NWT, Canada

Speciation and health risk considerations of arsenic in the edible mushroom Laccaria amethystina collected from contaminated and uncontaminated locations

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