Fig. 6From: Integrated physiological, metabolomic, and transcriptomic analyses elucidate the regulation mechanisms of lignin synthesis under osmotic stress in alfalfa leaf (Medicago sativa L.)Effect of exogenous ABA or ACC on lignin synthesis in alfalfa leaves. Lignin accumulations in alfalfa leaves under the ABA treatment (A) and ACC treatment (B). CK, normal growth condition; ABA, abscisic acid; MAN, mannitol; FLU, fluridone; ACC, 1-aminocyclopropane-1-carboxylic acid. Data were presented as the mean ± standard deviation (SD). Different letters indicate significant differences (P < 0.05)Back to article page