Histology LM of the wild-type and the four colour types in the variegated leaves (WT-DG-MG-LG-WH). a, d, g, j, and m. Light microscopy toluidine blue staining of the WT, DG, MG, LG, and WH sectors semi-thin section. b, e, h, k, and n. Ultrastructure of plastids in palisade cells of WT, DG, MG, LG, and WH. c, f, i, l, and o. Plastid ultrastructure of WT, DG, MG, LG, and WH sectors in spongy cells. Chl, chloroplast; Chl-like, chloroplast-like structure; G, granum;; M, mitochondria; N, nucleus; Nu, nucleolus; P, palisade cell layer; Pl, plastoglobuli; S, spongy cell layer; SG, starch granules; ST, stroma thylakoid; T, tonoplast; V, vacuole; scale bar in the a, d, g, j, and m = 50 µm; scale bar in the b-c, e–f, i, k-l, n–o = 1 µm