Figure 7.

Melatonin accelerates the recovery of photosynthesis (A) and the restoration of SBPase activity (B) in chilling-stressed tomato plants. Following a 12-h chilling stress, tomato plants were placed back at 25 °C for 10 h for the determination of photosynthesis recovery. Photosynthetic carbon assimilation rates of tomato leaves were measured at 1 h intervals. SBPase activities were assayed at hour 10. The values presented are means ± SDs (n = 3). Different letters (a–d) above bars indicate significant difference at p < 0.05 among treatments.