Table 5.

Ascorbate and glutathione pool in 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 difference among the treatments as per the Duncan test (P ≤ 0.05)

Treatments	AsA (µg g−1 FW)	DHA (µg g−1 FW)	AsA/DHA	GSH (µg g−1 FW)	GSSG (µg g−1 FW)	GSH/GSSG
Control	04.44 ± 0.86c	09.73 ± 1.20c	0.46	1.81 ± 0.62c	1.71 ± 0.69b,c	1.30
0mgCr(VI) Kg−1soil + 0.5 mM SA	08.72 ± 0.28c	13.20 ± 0.29c	0.66	3.48 ± 0.45b	0.59 ± 0.41d	3.87
50mgCr(VI) Kg−1soil	13.06 ± 1.83c	22.60 ± 2.42b	0.58	3.98 ± 0.16a	3.31 ± 0.68a	0.69
50mgCr(VI) Kg−1soil + 0.5 mM SA	40.95 ± 0.41a,b	56.58 ± 1.53a	0.72	4.25 ± 0.57a	1.04 ± 0.70c,d	1.25
100mgCr(VI) Kg−1soil	19.15 ± 1.55b	27.71 ± 1.17b	0.69	2.05 ± 0.50c	0.54 ± 0.645d	0.52
100 mg Cr(VI) Kg−1soil + 0.5 mM SA	53.39 ± 1.58a	28.74 ± 4.11b	1.86	3.72 ± 0.55a,b	2.23 ± 0.532b	2.24

AsA ascorbate, DHA dehydroascorbate, GSH glutathione, GSSG glutathione disulphide