Fig. 7

Effect of individual and combined application of IAA and compost on osmoprotectants production (A) Flavonoid contents (µmol g^− 1 FW), (B) Soluble sugars (mg g^− 1 DW), (C) Phenolic contents (µmol g^− 1 FW), (D) Soluble proteins (mg g^− 1 DW) and (E) free amino acids (mg g^− 1 DW) under Ni stress. Bars displaying same alphabets are statistically non-significant at P < 0.05