Isozyme pattern of antioxidant enzymes a SOD, b APX, c CAT, d POX and e DHAR leaves (sampled in March, LM) of C. album. Lanes indicate different incubation temperatures (5–100 °C, 30′). Equal amount of protein, 50 μg for SOD, APX, POX and DHAR and 15 μg for CAT activity was loaded in each lane