Fig. 4

Phytochemical contents and radical quenching ability in four selected drought-tolerant vegetable amaranth, β-carotene (mg 100 g^− 1 FW), ascorbic acid (mg 100 g^− 1 FW), Gallic acid equivalent total polyphenols (TP, μg g^− 1 FW), rutin equivalent total flavonoids (TF, μg g^− 1 DW), Trolox equivalent radical quenching ability (DPPH) (μg g^− 1 DW), Trolox equivalent radical quenching ability (ABTS⁺) (μg g^− 1 DW); different letters in the bar are differed significantly by Duncan Multiple Range Test ((P < 0.01), (n = 6)