Arabidopsis thaliana GLN2-encoded glutamine synthetase is dual targeted to leaf mitochondria and chloroplasts.

@article{Taira2004ArabidopsisTG,
  title={Arabidopsis thaliana GLN2-encoded glutamine synthetase is dual targeted to leaf mitochondria and chloroplasts.},
  author={Masakazu Taira and Ulrika Valtersson and Brad Burkhardt and Robert Ludwig},
  journal={The Plant cell},
  year={2004},
  volume={16 8},
  pages={2048-58}
}
In higher plants, photorespiratory Gly oxidation in leaf mitochondria yields ammonium in large amounts. Mitochondrial ammonium must somehow be recovered as glutamate in chloroplasts. As the first step in that recovery, we report glutamine synthetase (GS) activity in highly purified Arabidopsis thaliana mitochondria isolated from light-adapted leaf tissue. Leaf mitochondrial GS activity is further induced in response to either physiological CO(2) limitation or transient darkness. Historically… CONTINUE READING

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Mitochondrial ammonium must somehow be recovered as glutamate in chloroplasts .
Mitochondrial ammonium must somehow be recovered as glutamate in chloroplasts .
When observed by laser scanning confocal microscopy , leaf mesophyll and epidermal tissue of transgenic plants showed punctate GFP fluorescence that colocalized with mitochondria .
When observed by laser scanning confocal microscopy , leaf mesophyll and epidermal tissue of transgenic plants showed punctate GFP fluorescence that colocalized with mitochondria .
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