Fig. 4

Exogenous H₂O₂ changed the arrangement of actin filaments in Arabidopsis roots. A0–F0: Control group. A1–F1: 0.05 mM H₂O₂ treatment group. A2–F2: 0.5 mM H₂O_2-treatment group. A3–F3: 1 mM H₂O₂ treatment group. A4–F4: 2 mM H₂O₂ treatment group. A0–A6: The distribution of actin filaments in root tips treated with different concentrations of H₂O₂ and UV-B in the Lifeact-Venus and uvr8 lines. B0–B6: A partial enlargement of panels A0–A6. C0–C6: The change in actin filaments in the elongation zone after treatment with different concentrations of H₂O₂ and UV-B in the Lifeact-Venus and uvr8 lines. D0–D6: Partial enlargements of panels C0–C6. E0–E6: Effects of exogenous H₂O₂ treatment and UV-B on actin filaments in the mature region of Arabidopsis roots. F0–F6: A partial enlargement of panels E0–E6. Scale bar = 30 μm (A0–A6, C0–C6, E0–E6); 10 μm (B0–B6, D0–D6, F0–F6). g, h Statistics on the integrated density and skewness in each group