Fig. 3From: Heme is involved in the exogenous ALA-promoted growth and antioxidant defense system of cucumber seedlings under salt stressRoot length (A), root volume (B), root tips (C), root surface area (D), and root morphology (E) of cucumber seedlings. Values were mean ± SE (n = 5). Bars with different lowercase letters were significantly different by Tukey’s multiple range test (P < 0.05)Back to article page