The in vivo nitrogen isotope discrimination among organic plant compounds.

@article{Werner2002TheIV,
  title={The in vivo nitrogen isotope discrimination among organic plant compounds.},
  author={Roland A. Werner and Hanns Ludwig Schmidt},
  journal={Phytochemistry},
  year={2002},
  volume={61 5},
  pages={465-84}
}
The bulk delta 15 N-value of plant (leaf) biomass is determined by that of the inorganic primary nitrogen sources NO(3)(-), NH(4)(+) and N(2), and by isotope discriminations on their uptake or assimilation. NH(4)(+) from these is transferred into "organic N" mainly by the glutamine synthetase reaction. The involved kinetic nitrogen isotope effect does not become manifest, because the turnover is quantitative. From the product glutamine any further conversion proceeds in a "closed system", where… CONTINUE READING

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