Figure 3
From: Melatonin alleviates low-sulfur stress by promoting sulfur homeostasis in tomato plants

Exogenous melatonin (MT) minimizes sulfur deprivation-induced DNA damage. (a) Effects of melatonin with or without low S-stress on comet tail length, arrows indicate the comet tail and (b) percentage comet head and comet tail DNA and tail movement of DNA of tomato cells after 15-days of treatment. Fourteen-day-old tomato plants were supplied with an optimal amount of sulfur (S) or 1/10 of optimal sulfur (LS) for 15 days, and 100 µM of MT was sprayed every five days for a total of three applications. Data are presented as the means of 4 replicates. The means denoted by the same letter did not significantly differ at P < 0.05 according to a Tukey’s test.