Reactive oxygen species generation and antioxidant systems in plant mitochondria |
| |
Authors: | Nicolas Navrot Nicolas Rouhier Eric Gelhaye Jean-Pierre Jacquot |
| |
Institution: | IFR 110 Génomique Ecologie et Ecophysiologie Fonctionnelles, UMR 1136 INRA UHP Interaction Arbres Microorganismes, UniversitéHenri Poincaré, Facultédes Sciences, BP 239, F-54506 Vandoeuvre Cedex, France |
| |
Abstract: | 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. |
| |
Keywords: | |
|
|