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. 2014 Feb 25;9(2):e89624. doi: 10.1371/journal.pone.0089624

Figure 2. The effects of various NaCl concentrations on the enzyme activities of Salvia miltiorrhiza leaves.

Figure 2

The enzyme activities measured in this experiment include superoxide dismutase (SOD) and catalase (CAT) activities. Salvia miltiorrhiza seedlings were cultivated in 1/2 Hoagland nutrient solution for 3 weeks and were later exposed to salt stress by adding NaCl to concentrations of 25, 50, 75 and 100 mM of the hydroponic solution for 30 days. Non-treated plants were used as controls (0 mM NaCl). Error bars represent the standard errors (SE) of the means.