Fig. 2From: Ameliorative effect of melatonin improves drought tolerance by regulating growth, photosynthetic traits and leaf ultrastructure of maize seedlingsEffects of melatonin on Chlorophyll a, chlorophyll b, carotenoid, and chlorophyll a & b (mg g-1 FW) contents of maize seedlings under drought stress. The names of the treatments are the same as in (Fig. 1). Different lowercase letters indicate significant differences as determined by the LSD test (p ≤ 0.05)Back to article page