Number of mRNA / cis-NAT pairs with either a positive or negative correlation between cis-NAT and cognate gene steady-state mRNA expression (second and third columns), and number of pairs with positive or negative correlation between cis-NAT expression and cognate gene mRNA PA (fourth and fifth columns). The experimental conditions compared are indicated in the first column where root and shoot tissues are indicated with the prefix R and S, respectively, and untreated control conditions indicated with the suffix ctrl. The figures in brackets show the number of those pairs with a Pearson correlation coefficient > 0.4 or < −0.4 across the 12 experimental correlations.