Fig. 5

Effect of individual and combined application of IAA and compost on chlorophyll contents (A) SPAD value, (B) chlorophyll ‘a’ (mg g^− 1 FW), (C) chlorophyll ‘b’ (mg g^− 1 FW), and (D) Carotenoid contents (mg g^− 1 FW) under Ni stress. Bars displaying same alphabets are statistically non-significant at P < 0.05