Figure 7.

LM: fragments of the cross-sections through the “Clapp's Favourite” ((a), (b)) and “Conference” ((c)–(h)) fruit peel at the harvest maturity stage; ((a)–(d)) visible cuticle penetrating the anticlinal and internal periclinal walls of the epidermis (arrows) and an irregular shape of the epidermis cells; ((c)–(e)) visible dark deposits of tannin compounds in the epidermis and hypodermis cells and plastids with starch grains in the hypodermis and parenchyma (arrowheads) (c); (f) stone cell aggregation in the parenchyma (asterisk); (g) leucoplasts with starch grains in the parenchyma (staining with IKI) (arrows); (h) deposits of tannin compounds in the parenchyma (staining with FeCl₃) (arrowheads); Cu: cuticle, E: epidermis, H: hypodermis, and P: parenchyma.