Expression patterns of LaOMT1 during L. aurea roots treated with NaCl, cold, PEG, MeJA, ABA, and SNP. The expression level of LaOMT1 was measured using qRT-PCR analysis, and normalized to the reference gene LaTIP41. The expression of LaOMT1 in control sample (without treatment at 0 h) was defined as 1.0. Values were shown as means ± standard deviation (SD) of three independent biological replicates. Different letters above the bars indicate that the means are statistically different according to Duncan’s multiple test (p < 0.05). NaCl, sodium chloridel; PEG, polyethylene glycol; MeJA, methyl jasmonate; ABA, abscisic acid; SNP, sodium nitroprusside.