Plant treatments
For hormone treatments, MeJA (Sigma-Aldrich), ibuprofen, and MG132 were dissolved in absolute ethanol. Attached tea plant leaves and detachedArabidopsis leaves were then sprayed with MeJA (100 μM), ibuprofen (100 μM), or MeJA (100 μM) + MG132 (100 μM), with the same concentration of absolute ethanol used as a mock treatment. The leaves were harvested at time points appropriate to the experiment with three repetitions.