Fig. 2
From: Physiological and molecular response and tolerance of Macleaya cordata to lead toxicity
Pb induced H2O2 production in leaves of Macleaya cordata. (A) Histochemical location of H2O2 by 3,3’-diaminobenzidine staining, bar = 2 cm; (B) Cytochemical location of H2O2 by paraffin section based on DAB staining, bar = 20 μm. Plants were exposed to control (CK) and 100 µmol·L− 1 Pb treatment for 1 day (Pb 1d) or 7 days (Pb 7d). All experiments were repeated at least five times with similar results