Induced volatiles of experimental plants
We detected significantly more chemical compounds in induced than in noninduced guavas (P = 0.009). Induced guavas had higher abundances of β-Ocimene, Heptadiene, Cyclohexane. Other significant compounds were α-Pinene, Copaene, Caryophyllene, and Tetraline. In elm samples, β-Ocimene, α-Farensene and Tetraline were the most significant compounds. Despite the induced elm produced more compounds that noninduced elm, the difference was not statistically significant (Figure S3). However, the induced elm had significantly higher abundances of 1-Butanol, 3-methyl-, acetate and 2-Butanone,4-(2,6,6-trimethyl-1-cyclehexen-1-yl).