Compartment specific response of antioxidants to drought stress in Arabidopsis

- Subcellular H2O2, ascorbate and glutathione was monitored during drought.
- Glutathione seems to be involved in signaling drought stress from roots to leaves.
- Ascorbate and glutathione decreased whereas H2O2 accumulated during drought.
- During drought H2O2 leaked into vacuoles where it was detoxified by ascorbate.
- The breakdown of the antioxidative system during drought favored ROS accumulation.