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Title: The influence of pH and media composition on the uptake of inorganic selenium by Chlamydomonas reinhardtii

Abstract

The uptake of inorganic selenium species, selenate and selenite, by the green alga Chlamydomonas reinhardtii Dang was examined as a function of pH over the range 5 to 9 and in media with varying concentrations of major ions and nutrients using {sup 75}Se as a radiotracer. Little difference was noted in the uptake of selenate as a function of pH, with the maximum uptake occurring at pH 8; however, selenite uptake increased substantially at the lower pH values. Selenate uptake was significantly decreased by higher sulfate concentrations and increased significantly by calcium, magnesium, and ammonium. Selenite uptake was significantly increased when the phosphate concentrations in the media were reduced. The results of these experiments demonstrate that varying water chemistry may significantly affect the uptake of inorganic selenium by phytoplankton and the subsequent transfer of the selenium to higher trophic levels.

Authors:
;  [1]
  1. Academy of Natural Sciences, St. Leonard, MD (United States). Benedict Estuarine Research Center
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
377807
Resource Type:
Journal Article
Journal Name:
Environmental Toxicology and Chemistry
Additional Journal Information:
Journal Volume: 15; Journal Issue: 9; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; SELENIUM; BIOLOGICAL ACCUMULATION; CHLAMYDOMONAS; BIOLOGICAL STRESS; WATER POLLUTION; SELENIUM 75; TRACER TECHNIQUES; PH VALUE; PHYTOPLANKTON

Citation Formats

Riedel, G F, and Sanders, J G. The influence of pH and media composition on the uptake of inorganic selenium by Chlamydomonas reinhardtii. United States: N. p., 1996. Web. doi:10.1002/etc.5620150922.
Riedel, G F, & Sanders, J G. The influence of pH and media composition on the uptake of inorganic selenium by Chlamydomonas reinhardtii. United States. https://doi.org/10.1002/etc.5620150922
Riedel, G F, and Sanders, J G. 1996. "The influence of pH and media composition on the uptake of inorganic selenium by Chlamydomonas reinhardtii". United States. https://doi.org/10.1002/etc.5620150922.
@article{osti_377807,
title = {The influence of pH and media composition on the uptake of inorganic selenium by Chlamydomonas reinhardtii},
author = {Riedel, G F and Sanders, J G},
abstractNote = {The uptake of inorganic selenium species, selenate and selenite, by the green alga Chlamydomonas reinhardtii Dang was examined as a function of pH over the range 5 to 9 and in media with varying concentrations of major ions and nutrients using {sup 75}Se as a radiotracer. Little difference was noted in the uptake of selenate as a function of pH, with the maximum uptake occurring at pH 8; however, selenite uptake increased substantially at the lower pH values. Selenate uptake was significantly decreased by higher sulfate concentrations and increased significantly by calcium, magnesium, and ammonium. Selenite uptake was significantly increased when the phosphate concentrations in the media were reduced. The results of these experiments demonstrate that varying water chemistry may significantly affect the uptake of inorganic selenium by phytoplankton and the subsequent transfer of the selenium to higher trophic levels.},
doi = {10.1002/etc.5620150922},
url = {https://www.osti.gov/biblio/377807}, journal = {Environmental Toxicology and Chemistry},
number = 9,
volume = 15,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 1996},
month = {Sun Sep 01 00:00:00 EDT 1996}
}