Effect of NaCl stress on P5CS activities of Jerusalem artichoke in roots (A), stems (B) and leaves (C).

30-day-old Jerusalem artichoke plantlets were treated with 0 or 100 mM NaCl (see Materials and Methods) for 12, 24, 48 and 72 h. All treatments had three biological replicates. P5CS activities were measured by hydroxylamine hydrochloride assay at A₅₃₅ nm (see Materials and Methods). Values represent means ± SE of three independent experiments. Significant differences (P≤0.05) between treatments are indicated by different letters.