RT-PCR analysis of defence-related gene after an OA treatment. Regulation of PDF1.2, PR1, PAL1, AOX1a/hsr3 and AAA-ATPase/hsr4 after an OA (3 mM) treatment and effect of a pre-treatment with anion channel inhibitors (9-AC, 200 µM and NA, 200 µM) on the transcription of these genes prior to an OA (3 mM) treatment. EF1αA4 is presented as a control. Results presented are representative of 3 experiments.