Fig. 3

Effects of exogenous Put and d-arg on the POX (a), CAT (b) and SOD (c) activities in the leaves of anthurium seedlings under chilling stress. Seedlings were treated with normal temperature, chilling (control), 0.5 mM Put + chilling, 1.0 mM Put + chilling, 1.5 mM Put + chilling, 2.0 mM Put + chilling or 1.0 mM d-arg + chilling for 3 days and a recovery for 1 day, and activities of POX, CAT and SOD in the leaves were assayed. Each point represents the mean ± SE (n = 5). Treatments marked with different letters at a given sampling date are significantly different at P < 0.05