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(a) CB112 stem cross section (×1.4); (b) CB222 stem cross section (×1.4); (c) CB112 leaf cross section (×3.5); (d) CB222 leaf cross section (×3.5). (Ep: epidermis; Ct: cortex; Pt: pith; Ade: adaxial epidermis; Abe: abaxial epidermis; Sp: spongy parenchyma; Pp: palisade parenchyma.)
