Levels of free and conjugated SA in P6-transgenic and non-transgenic Arabidopsis following inoculation with <i>Ps</i>t (<i>AvrB</i>).

<p>(A) free SA, (B) SA-conjugates (SA-β-glucoside) in leaves of NT (L<i>er</i>) and P6-transgenic (A7 and B6) plants inoculated on a single leaf with 1.2×10³ cfu of bacteria. Leaves from uninoculated plants were used as controls. Each sample comprised the pooled tissue from 10 leaves harvested 48 h after inoculation. Bars show mean values from 3 samples, error bars indicate standard error.