NiCl2 (ppm) Chl a (mg/gFW) Chl b (mg/gFW) Chl Total (mg/g FW) Car (mg/g FW) M.crystallinum 0 0.089 ± 0.014a 0.048 ± 0.006a 0.137 ± 0.010a 0.044 ± 0.006a 25 0.075 ± 0.001b 0.038 ± 0.002b 0.113 ± 0.001b 0.038 ± 0.004b 50 0.083 ± 0.010b 0.050 ± 0.003a 0.132 ± 0.007a 0.043 ± 0.007a 100 0.107 ± 0.003c 0.052 ± 0.002a 0.159 ± 0.004c 0.048 ± 0.008a B.juncea 0 0.228 ± 0.011a 0.103 ± 0.017a 0.331 ± 0.028a 0.078 ± 0.004a 25 0.192 ± 0.011b 0.072 ± 0.006b 0.264 ± 0.012b 0.084 ± 0.004b 50 0.183 ± 0.016b 0.068 ± 0.006c 0.251 ± 0.017b 0.080 ± 0.006ab 100 0.139 ± 0.009c 0.046 ± 0.003d 0.186 ± 0.012c 0.058 ± 0.005c

Table 2: Effect of NiCl2 on leaf chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll (Total Chl), and carotenoid (Car) concentration of M. crystallinum and B. juncea. Means (n =6 per treatment ± SE) followed by the same letters are not significantly different at P ≤ 0.05.