Fig. 1

Effects of ALA on leaf osmotic potential (a), relative water content (b), and chlorophyll content (c) in wheat seedlings under drought stress. Each value is the mean of three replicates, and the vertical bars indicate the standard errors (SE). CK, treated with 0 mg L^− 1 ALA + distilled water; ALA, treated with 100 mg L^− 1 ALA and distilled water; drought, treated with 0 mg L^− 1 ALA without distilled water; D + A, treated with 100 mg L^− 1 ALA without distilled water. The wheat plants underwent drought stress 3 d after pretreatment with or without ALA