Activation of γ-Aminobutyrate Production by Chloroplastic H₂O₂ Is Associated with the Oxidative Stress Response

抄録

We isolated an Arabidopsis knockout line lacking glutamate decarboxylase 1 (GAD1), one that produced γ-aminobutyrate (GABA), as an oxidative stress-insensitive mutant, and found that chloroplastic H₂O₂ enhances GAD1 expression and GABA levels. This suggests a possible relationship between GABA metabolism and the chloroplastic H₂O₂-mediated stress response.