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Exogenous application effect of selenium (Se), silicon (Si) and their combinations on leaf anatomy of wheat plants grown in saline soil. (A) control; (B) 30 mM of Se; (C) 30 mM of Si; (D) 30 mM of Se + Si; (mv = mid vein, vb = vascular bundle, xv = xylem vessel, pa = Palisade and ms = mesophyll tissue).
