PS3- and Lam-treated plants share a common stress transcriptome that partly overlaps the SA- and JA-dependent ones.

<p><b>A.</b> Hierarchical clustering analysis of genes expressed in plants sprayed with PS3 (5 g l⁻¹), Lam (5 g l⁻¹), salicylic acid (SA, 1 mM), or jasmonic acid (JA, 40 µM), 12 h post-treatment (hpt). Three independent biological experiments were performed (n = 3) and hierarchical clustering was realized with TIGR MeV software <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0088145#pone.0088145-Saeed1" target="_blank">[42]</a> after normalization with the corresponding controls: adjuvant (0.05%) for PS3 and Lam and DMSO (0.1%) for SA and JA. <b>B.</b> Venn diagram showing specific and common genes regulated by PS3, Lam, SA or JA at 12 hpt (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0088145#pone.0088145.s005" target="_blank">Table S2</a> for gene identifiers). <b>C.</b> Gene Ontology enrichment analysis of the PS3-up-regulated genes at 12 hpt realized with the AgriGO software <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0088145#pone.0088145-Du1" target="_blank">[36]</a>. An asterisk (*) implies statistical significance between PS3-induced transcripts <i>vs</i> reference transcripts (Fisher's exact test with Benjamini-Yekutieli false detection rate correction, <i>Q</i><0.05; Fold-change cut-off 2 used). A hash mark (#) indicates a significant difference between PS3-induced transcripts <i>vs</i> reference transcripts when a more stringent fold-change cut-off of 4 was used.