Figure 1

Effect of 28-HBL concentration (0, 10−6, 10−9, 10−12 M) on (A) shoot length and (B) root length of B. juncea L. under combinations of extreme temperature (4 °C, 44 °C) and NaCl salt (180 mM) stress in laboratory conditions. Different superscripted alphabetical letters within a column indicate significant differences from each other in all combinations (Tukey’s test, p ≤ 0.05).