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SEM: stomata in the fruit epidermis of the “Clapp's Favourite” ((a), (b), (d)) and “Conference” ((c), (e)) fruits at the fruit set stage. (a) numerous visible stomata (arrowheads); (b) the site (scar) of a broken off mechanical trichome (arrow) is visible; ((c), (e)) open stomata; (d) stoma with structures of unknown origin; ((d), (e)) stoma with epidermis cracks (arrowheads).
