Table 2.

Effect of arsenate applied either singly or in combination with phosphate on the pigment levels in black gram.

Treatments	Total chlorophyll (mg/g fw of tissue)	Chlorophyll a (mg/g fw of tissue)	Chlorophyll b (mg/g fw of tissue)	Carotenoids (mg/g fw of tissue)
Control	2.40 ± 0.006	1.51 ± 0.003	0.88 ± 0.009	0.82 ± 0.002
100 µM As	2.07 ± 0.007*	1.37 ± 0.001*	0.70 ± 0.006*	0.65 ± 0.002*
200 µM As	1.67 ± 0.004*	1.10 ± 0.002*	0.58 ± 0.002*	0.59 ± 0.002*
100 µM As + P	2.13 ± 0.010*	1.38 ± 0.005*	0.75 ± 0.005*	0.68 ± 0.006*
200 µM As + P	1.97 ± 0.005*	1.30 ± 0.008*	0.69 ± 0.004*	0.64 ± 0.005*

P = 40 ppm K₂HPO₄; values are means of three replicates ± SE *Data significant at P < 0.05. Multiple comparisons versus control group (Holm Sidak method) overall significance level = 0.05.