Fig. 8

Effects of different concentrations of nano-Se (1, 5, and 20 mg/L) on the Asn (A), Val (B), His (C), Tyr (D), Arg (E), Trp (F), Thr (G), Gln (H), Pro (I), Phe (J), Orn (K), GABA (L), Leu (M), Hyp (N), Glu (O), Ser (P), Cit (Q), Asp (R), Ala (S), and Lys (T) levels in pepper plants (root, leaves, and fruit) under Cd stress. Significant differences at P < 0.05 are indicated by various letters for these treatments