Figure 4
From: Bark and wood tissues of American elm exhibit distinct responses to Dutch elm disease

Levels of jasmonates in the inoculated stem tissues of ‘Valley Forge’ and ‘Princeton’. (a–f) The level of 12-oxo phytodienoic acid (OPDA), jasmonic acid (JA) and JA- isoleucine (JA-Ile), respectively, in the bark (a,c,e) and core (b,d,f) tissues of ‘Valley Forge’ (VF) and ‘Princeton’ (P) at different time points of inoculation with the O. novo-ulmi (MH75-4O). The results are the mean ± SE of three biological replicates. Values marked with an asterisk (*) are significantly higher than the control sample (P-bark at 0 hpi) and the corresponding time point in the other genotype (P < 0.05).