Fig. 5From: Heme is involved in the exogenous ALA-promoted growth and antioxidant defense system of cucumber seedlings under salt stressThe activities of CAT (A), POD (B), SOD (C) and APX (D) of cucumber seedlings. Values were mean ± SE (n = 3). Bars with different lowercase letters were significantly different by Tukey’s multiple range test (P < 0.05)Back to article page