An ornithine δ-aminotransferase gene OsOAT confers drought and oxidative stress tolerance in rice

► OsOAT is a target of the stress-responsive NAC transcription factor SNAC2. ► OsOAT is induced by drought via both ABA-dependent and ABA-independent pathways. ► Overexpression of the OsOAT enhanced drought and oxidative stress resistance in rice. ► Overexpression of OsOAT caused pre-accumulation of proline, and some antioxidants were increased in the OsOAT-overexpressing plants.