Journal
PHYSIOLOGIA PLANTARUM
Volume 129, Issue 1, Pages 185-195Publisher
WILEY
DOI: 10.1111/j.1399-3054.2006.00777.x
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In living cells, reactive oxygen species (ROS) play a key role in signaling but these compounds can also damage macromolecules. As in other compartments, the mitochondrial ROS concentrations need to be tightly controlled. Plant mitochondria contain several antioxidant systems that are not only able to scavenge ROS and limit their production but also to repair damages to macromolecules and possibly to serve as redox sensors. They comprise ascorbate- and glutathione-dependent pathways as well as systems based on thioredoxin (TRX)- and glutaredoxin (GRX)-like molecules. This review describes the various mitochondrial redox pathways for ROS control in plants with special emphasis on the poorly studied GRX and TRX systems and provides perspectives for future research in this area.
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