Effect of sulfate level on selenium uptake by Ruppia maritima

Effect of sulfate level on selenium uptake by Ruppia maritima

Ruppia maritima (wigeongrass), the dominant aquatic macrophyte in the agricultural drainage evaporation ponds of the Central Valley of California, is a food source for various waterfowl and shorebirds. Whole-plant uptake and accumulation of selenate (SeO 4 −2 or Se+6), selenite (SeO 3 −2 or Se +4),...

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Bibliographic Details
Published in:Chemosphere (Oxford) Vol. 30; no. 3; pp. 579 - 591
Main Authors: Bailey, F.C., Knight, A.W., Ogle, R.S., Klaine, S.J.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-02-1995
Elsevier
Subjects:
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Brackish
Ecotoxicology, biological effects of pollution
Freshwater
Fundamental and applied biological sciences. Psychology
Marine
Marine and brackish environment
California
United States
North America
America
USA, California
Halophyte
Brackish water environment
Monocotyledones
Potamogetonaceae
Sulfates
Trophic chain
Absorption
Pond
Phytotoxicity
Angiospermae
Selenates
Spermatophyta
Water pollution
Antagonist
Aquatic plant
Ruppia maritima
Biological accumulation
Selenites
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Summary:Ruppia maritima (wigeongrass), the dominant aquatic macrophyte in the agricultural drainage evaporation ponds of the Central Valley of California, is a food source for various waterfowl and shorebirds. Whole-plant uptake and accumulation of selenate (SeO 4 −2 or Se+6), selenite (SeO 3 −2 or Se +4), and seleno-methionine (Se −2) by R. maritima from artificial evaporation pond water was compared over a 21 day period, and the effect of sulfate, a known selenate antagonist, on Se uptake was investigated. Plants were treated with 10, 100, or 1000 ug/l as selenium. Under both high and low sulfate conditions, R. maritima was found to accumulate seleno-methionine to a much higher level than either selenite or selenate. However, under low sulfate conditions, selenate uptake was two orders of magnitude greater than under high sulfate conditions, indicating a sulfate/selenate antagonism. Bioconcentration factors for seleno-methionine under high and low sulfate conditions and for selenate under low sulfate conditions were very high (up to 21,800 for seleno-methionine and 1080 for selenate).
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ISSN:0045-6535
1879-1298
DOI:10.1016/0045-6535(94)00419-U