Fig. 5

CLSM images of ARS-labeled HAP nanoparticles. This figure shows the plant root treated with ARS-labeled HAP nanoparticles (a), the root of the blank sample (b), the plant shoot treated with ARS-labeled HAP nanoparticles (c), and the shoot of the blank sample (d). Imaging was performed at excitation/emission wavelengths of 546/590 nm. Abbreviations: ARS, alizarin red S; HAP, hydroxyapatite nanoparticles