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. 2011 Jan 6;6(1):e15853. doi: 10.1371/journal.pone.0015853

Figure 4. Expression of tomato defense genes in response to purified Ralstonia solanacearum extracellular polysaccharide.

Figure 4

Gene expression was measured in bacterial wilt-susceptible cv. Bonny Best (S) and horizontally resistant line H7996 (R) by qRT-PCR 24 h after injection of 20 µg purified EPS through the cut petiole of the first true leaf directly into the vascular system. Genes represent activation of the ET pathway (PR-1b), the SA pathway (GluA), and the JA pathway (Pin2). Asterisks above bars indicate significant differences in gene expression between BW susceptible Bonny Best and horizontally resistant H7996 (***  =  P>0.0001). Bars show normalized mean fold induction relative to mock-inoculated control plants (± SE). N = 40 plants per treatment, in four independent experiments.