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Effects of three different photoperiods (12 h, 16 h, and 20 h) on the contents of six trace mineral elements, Fe (A), Mn (B), Zn (C), B (D), Cu (E), and Mo (F), in tomato shoots. The data represent the mean of at least three biological replicates. Different letters indicate significant differences (LSD) (α = 0.05). Fe, iron; Mn, manganese; Zn, zinc; B, boron; Cu, copper; Mo, molybdenum.
