Fig. 4From: A simple method for the application of exogenous phytohormones to the grass leaf base protodermal zone to improve grass leaf epidermis development researchConfocal images of maize leaf protoderm treated with different concentrations of 2,4-D (4 × 10–4 ~ 4 × 10–1 mg/ml). The top row A1–E1 represents the cell proliferation stages of the leaf protoderm’s treatment area with different concentrations of 2,4-D (4 × 10–4 ~ 4 × 10–1 mg/ml). The bottom row A2–E2 is the asymmetric entry division stage of the leaf protoderm area of treatment with different concentrations of 2,4-D (4 × 10–4 ~ 4 × 10–1 mg/ml). All confocal images were stained by propidium iodide. Scale bar = 20 μmBack to article page