*4.11. Hormone Treatments*

*S. lycopersicum* plants were grown at 25 ± 2 ◦C with a 12 h light/dark photoperiod. The humidity was maintained at approximately 60% to 70%, and the photosynthetic photon flux density was controlled at about 120 µmol photons/m2/s. When the seedlings were six weeks old, the plants were treated with IAA (100 µM), GA (100 µM) and SA (100 µM), respectively [54]. Plant leaves were collected at 0, 1, 3, 6, 12, and 24 h after treatments, immediately frozen in liquid nitrogen, and then stored at −80 ◦C until use.
