In higher plants, only root mitochondria, but not leaf mitochondria reduce nitrite to NO, in vitro and in situ.

@article{Gupta2005InHP,
  title={In higher plants, only root mitochondria, but not leaf mitochondria reduce nitrite to NO, in vitro and in situ.},
  author={Kapuganti Jagadis Gupta and Maria Stoimenova and Werner M. Kaiser},
  journal={Journal of experimental botany},
  year={2005},
  volume={56 420},
  pages={
          2601-9
        }
}
At oxygen concentrations of < or =1%, even completely nitrate reductase (NR)-free root tissues reduced added nitrite to NO, indicating that, in roots, NR was not the only source for nitrite-dependent NO formation. By contrast, NR-free leaf slices were not able to reduce nitrite to NO. Root NO formation was blocked by inhibitors of mitochondrial electron transport (Myxothiazol and SHAM), whereas NO formation by NR-containing leaf slices was insensitive to the inhibitors. Consistent with that… CONTINUE READING

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