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Selenium Metabolism in Plants

  • Elizabeth A. H. Pilon-Smits
  • Colin F. Quinn
Chapter
Part of the Plant Cell Monographs book series (CELLMONO, volume 17)

Abstract

Selenium (Se) is an essential nutrient for many organisms, but also toxic at higher levels. While certain algae require Se to make selenoproteins, no such requirement has been shown for higher plants. Still, plants readily take up and assimilate Se using sulfur (S) transporters and biochemical pathways, and can also volatilize methylated Se. Some plants can even hyperaccumulate Se to levels around 1% of plant dry weight, in the form of methyl-selenocysteine, probably as a defense mechanism. Plants may be used both to provide dietary Se in areas of Se deficiency, and to clean up Se pollution from seleniferous areas. These applications benefit from better insight into the genetic and biochemical mechanisms that control plant Se tolerance and accumulation. Here we give a review of plant Se metabolism, and present new insights into plant Se tolerance and hyperaccumulation mechanisms. Moreover, we summarize research on the ecological aspects of plant Se accumulation.

Keywords

Diamondback Moth Double Transgenics Seleniferous Soil Selenate Reduction Selenocysteine Lyase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The writing of this manuscript was supported by National Science Foundation grant # IOS-0817748 to EAHPS. We thank Wiebke Tapken for creative design of figures. We thank all researchers who contributed to the results described here and apologize to those whose work we could not cover due to space limitation.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Elizabeth A. H. Pilon-Smits
    • 1
  • Colin F. Quinn
    • 1
  1. 1.Biology DepartmentColorado State UniversityFort CollinsUSA

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