Fig. 6From: Application of melatonin-mediated modulation of drought tolerance by regulating photosynthetic efficiency, chloroplast ultrastructure, and endogenous hormones in maizeEffect of melatonin on indole-3-acetic acid (IAA) and zeatin riboside (ZR) content of maize under drought stress conditions. 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