Abstract
ABSTRACTAn obligate requirement for selenium is demonstrated in axenic culture of the coastal marine diatom Thalassiosira pseudonana (clone 3H) (Hust.) Hasle and Heimdal grown in artificial seawater medium. Selenium deficiency was characterized by a reduction in growth rate and eventually by a cessation of cell division. The addition of 10−10 M Na2eO3 to nutrient enriched artifical seawater resulted in excellent growth of T. pseudonana and only a slight inhibition of growth occurred at Na2SeO3 concentrations of 10−3 and 10‐2 M. By contrast, Na2SeO4 failed to support growth of T. pseudonana when supplied at concentrations less than 10−7 M and the growth rate at this concentration was only one quarter of the maximum growth rate. The addition of 10−3 and 10−2 M Na2SeO4 to the culture medium was toxic and cell growth was completely inhibited. Eleven trace elements were tested for their ability to replace the selenium requirement by this alga and all were without effect.In selenium‐deficient and selenium‐starved cultures of T. pseudonana cell volume increased as much as 10‐fold as a result of an increase in cell length (along the pervalvar axis) but cell width was constant. It is concluded that selenium is an indispensable element for the growth of T. pseudonana and it should be included as a nutrient enrichment to artificial seawater medium when culturing this alga.
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Dates
Type | When |
---|---|
Created | 15 years ago (Aug. 4, 2010, 3:55 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 21, 2023, 3:26 a.m.) |
Indexed | 1 year, 1 month ago (July 24, 2024, 6:33 a.m.) |
Issued | 38 years, 2 months ago (June 1, 1987) |
Published | 38 years, 2 months ago (June 1, 1987) |
Published Online | 18 years, 4 months ago (April 30, 2007) |
Published Print | 38 years, 2 months ago (June 1, 1987) |
@article{Price_1987, title={SELENIUM: AN ESSENTIAL ELEMENT FOR GROWTH OF THE COASTAL MARINE DIATOM THALASSIOSIRA PSEUDONANA (BACILLARIOPHYCEAE)1,2}, volume={23}, ISSN={1529-8817}, url={http://dx.doi.org/10.1111/j.1529-8817.1987.tb04421.x}, DOI={10.1111/j.1529-8817.1987.tb04421.x}, number={2}, journal={Journal of Phycology}, publisher={Wiley}, author={Price, Neil M. and Thompson, Peter A. and Harrison, Paul J.}, year={1987}, month=jun, pages={1–9} }