FIGURE 2.

Phenotype, reactive oxygen species (ROS) accumulation, malondialdehyde (MDA) content, and relative conductivity in Cavendish and Dajiao under cold stress. Six-leaf-stage seedlings of Cavendish and Dajiao were treated at 10°C for 0, 3, and 6 h (B,E,H, respectively), and one representative leaf is shown, respectively (A,C,D,F,G,I). The level of superoxide radicals and H₂O₂ in the leaves of Cavendish and Dajiao was assessed by NBT (J,L) and DAB (K,M) staining, respectively. MDA content (N) and relative conductivity (O) in the leaves of Cavendish and Dajiao were measured under treatment at 10°C for 0, 3, 6, 24, and 48 h. Data are the mean ± SE (n = 5). Different letters indicate significant differences at p ≤ 0.05 between control and treatment.