2.1. Plant Materials and Treatment

The tomato variety Glamour was planted in the growth chamber of the Northeast Agricultural University, with a light intensity of 120 μM photons m⁻² s⁻¹, photoperiod 16 h, day/night temperature 22/18 °C, stress treatment with cold and drought, the methods for stress treatment are shown in Zhou et al. [27], 100 mM salicylic acid (SA) and jasmonic acid (JA) were used to treat the 27-day-old plants, each solution was sprayed evenly over each blade and stop spraying before the solution drips from the leaf. The first fully expanded leaf from the top of the plants was collected with three replicates after 0 h, 6 h, 12 h, 24 h, 36 h and 48 h per treatment [27]. Three plants of the same growth were selected for each treatment as three biological replicates, and then three technical replicates were performed for each biological replicate.