Figure 4.

Effects of elicitor concentration on volatile emissions mediated by JA–SA interaction. a Effects of SA concentration on emission of JNFs and JPFs. b Effects of MeJA concentration on emission of SPFS. See Table 1 for treatment abbreviations. Bar values represent log₂ fold changes in emitted amounts of JNFs, JPFs, and SPFsbetween dual elicitation and corresponding single elicitation (data are presented as mean ± standard error, n = 4). Mean values are linked by dashed lines. Asterisks indicate significant differences in the JNF, JPF, and SPF emitted amounts between dual elicitations and corresponding single elicitations (independent samples t-test, ^*P < .05, ^**P < .01). Different letters indicate significant differences in log₂ fold changes in emitted amounts of JNFs, JPFs, and SPFs among different dual elicitations (one-way ANOVA and post hoc Tukey’s test, P < .05). Numbers in blue, green, and orange respectively indicate the number of compounds in JNFs, JPFs, and SPFs after dual elicitation minus the number after corresponding single elicitations.