Fig. 3 | Scientific Reports

Fig. 3

From: Response of amino acids, phenolic acids, organic acids, and mineral elements to fulvic acid in spinach (Spinacia oleracea L.) under nitrate stress

Fig. 3

Effect of FA on phenolic acid content in spinach under nitrate stress. Data are expressed as an average (n = 3). Mean values of different letters indicate significant differences using Duncan’s test (p < 0.05). Control (CK), 0.15% FA (CF), 150 mM NO3− (N), 0.15% FA + 150 mM NO3− (NF). (A) Protocatechuic acid. (B) p-hydroxybenzoic acid. (C) Chlorogenic acid. (D) Gallic acid. (E) 4-coumaric acid. (F) Ferulic acid. (G) Cinnamic acid. (H) Benzoic acid. (I) Gentisic acid. (J) Caffeic acid. (K) Cynarin. (L) Sinapic acid.

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