Fig. 5.

a–e Activities of enzymes of AsA-GSH cycle: a superoxide dismutase (SOD), b ascorbate peroxidase (APX), c dehydroascorbate reductase (DHAR) d monodehydroascorbate reductase (MDHAR), and e glutathione reductase (GR) in leaves of 45-days old tomato grown under different concentrations of Cr (VI) contaminated soil (with and without 0.5 mM SA). Each value is the mean of three replicates ± SD. The superscripts indicate significant differences among the treatments as per the Duncan test (P ≤ 0.05)