PARP inhibition reduces anthocyanin accumulation under stress.

<p><i>Arabidopsis</i> plants (Col-0) were grown at 80–100 µE, 22°C on MS medium with (+3 MB) or without (−3 MB) the PARP inhibitor 3-Methoxy-benzamide (3 MB) and subjected to three different conditions: control, oxidative stress (0.1 µM Paraquat) or sucrose stress (150 mM Sucrose) and harvested after 14 days. A, indicates the whole plant phenotype of representative plants from all treatments. B, indicates the relative anthocyanin content after 14 days. Data are combined from three independent experiments with 5 replicates in each experiment (n = 15). C, shows the effect of different PARP inhibitors used: 3-Methoxy-benzamide (3 MB), 3-Methyl-benzamide (3MeB) and 3-Aminophthalaminhydrazide (3AP). The relative anthocyanin content is shown, combined from two independent experiments with 5 replicates in each experiment (n = 10). Asterisks indicate significant differences (P<0.05) of plants grown with 3 MB compared to those without 3 MB in the same condition.