Herbivore species, infestation time, and herbivore density affect induced volatiles in tea plants

摘要: In response to insect herbivory, plants emit volatiles that are used by the herbivores’ natural enemies locate their host or prey. Herbivore attack also enhances tea aroma. Herbivore-induced plant (HIPVs) vary both quantitatively and qualitatively with infestation duration herbivore density. Thus, whether HIPVs can reliably communicate identities of herbivores is interest. Here, we studied induced leafhopper (Empoasca vitis, a piercing–sucking insect), geometrid (Ectropis oblique, chewing methyl jasmonate (MeJA, hormone). Geometrid feeding more complex volatile blends than did infestation. The significantly increased in quality quantity time during first 16 h infestation, after which profiles emission compounds varied diurnally. (E)-β-Ocimene displayed unique rhythm peaked at night. amount increased, while changed little, Overall, leafhoppers geometrids different from plants, HIPV circadian were similar densities. Our findings suggest new method enhancing flavor using exogenously applied hormones, because MeJA general composition.