Fig. 4From: Induction of tetraploids in Paper Mulberry (Broussonetia papyrifera (L.) L’Hér. ex Vent.) by colchicineObservation on stomata and leaf cell structure of different ploidy. a, c diploid; b, d tetraploid. UP: Upper epidermis thickness; LO: Lower epidermis thickness; SPT: Sponge tissue thickness; PTT: Palisade tissue thicknessBack to article page