Chemical form and distribution of selenium and sulfur in the selenium hyperaccumulator Astragalus bisulcatus.

@article{Pickering2003ChemicalFA,
  title={Chemical form and distribution of selenium and sulfur in the selenium hyperaccumulator Astragalus bisulcatus.},
  author={Ingrid J. Pickering and Carrie M Wright and Ben Bubner and Danielle Ellis and Michael W Persans and Eileen Y. Yu and Graham N George and Roger C Prince and David E. Salt},
  journal={Plant physiology},
  year={2003},
  volume={131 3},
  pages={1460-7}
}
In its natural habitat, Astragalus bisulcatus can accumulate up to 0.65% (w/w) selenium (Se) in its shoot dry weight. X-ray absorption spectroscopy has been used to examine the selenium biochemistry of A. bisulcatus. High concentrations of the nonprotein amino acid Se-methylseleno-cysteine (Cys) are present in young leaves of A. bisulcatus, but in more mature leaves, the Se-methylseleno-Cys concentration is lower, and selenate predominates. Seleno-Cys methyltransferase is the enzyme responsible… CONTINUE READING

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