Figure 3

Effect of Cd on the activities of SOD, POD, CAT, and APX, and the content MDA and free proline in the fruiting bodies of A. bisporus. (a) SOD activity. (b) POD activity. (c) CAT activity. (d) APX activity. (e) MDA content. (f) Proline content. Different capital letters indicate significant differences among Cd stresses under the same sampling stage determined by LSD’s test with p < 0.05; different lower letters indicate significant differences within the sampling stage under the same Cd stress concentration determined by LSD’s test with p < 0.05. PS: effect of sampling time; PCd: effect of Cd concentration; PS×Cd: Interaction between sampling time and Cd concentration. Error bar: SD.