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Scanning electron micrographs of abaxial leaf surfaces and stomata of the cotyledonary leaves of R. communis after 6 day of exposure to CuSO4 (160 µM) and cytokinin (KIN and BAP) treatments in Hoagland’s nutrient medium. (A,B): Control; (C,D): 160 µM CuSO4; (E,F): 160 µM CuSO4 + KIN; (G,H): 160 µM CuSO4 + BAP.
