FISH localization of centromeric 180 bp repeats on 20 μm cryosections. (A, D, G, J) DAPI counterstaining. (B, E, H, K) localization of 180 bp repeats. (C, F, I, L) merged images. (A, B, C) cryosection. Bar = 10 μm. (D, E, F) Epidermis nucleus. Bar = 5 μm. (G, H, I) Subepidermis nucleus. Bar = 5 μm. (J, K, L). Guard cell nuclei. Bar = 2 μm.