Young tomato psyllids induce salicylic acid regulated transcripts.

<p>Transcript abundance (mean ± SE) for <i>PAL5</i> and <i>PR1</i> in fully expanded leaves exposed to 4 different developmental stages of tomato psyllid (1<sup>st</sup>–2<sup>nd</sup>, 3<sup>rd</sup>, 5<sup>th</sup>, and adult) after 24 hr of insect feeding: (A) <i>PAL5</i>. (B) <i>PR1</i>. Significantly different regulation from undamaged controls (dashed lines = control transcript abundance) is indicated by an asterisk and significant differences between insect developmental stages are indicated by letters (<i>P</i><0.05).</p>