Table 6: Effects of salicylic acid on photosynthetic pigments of cowpea (ITOK-568-18) exposed to arsenic stress.
Arsenic (mg/L) |
Bioregulators (mg/L) |
Chl a(mg/g/fw) |
Chl b(mg/g/fw) |
Car (mg/g/fw) |
0 |
0 |
8.31 ± 0.01d |
5.38 ± 0.01b |
1.96 ± 0.02c |
250 |
0 |
1.94 ± 0.04l |
1.05 ± 0.05k |
0.42 ± 0.02g |
500 |
0 |
0.99 ± 0.01m |
0.73 ± 0.03 m |
0.18 ± 0.00i |
0 |
SA 150 |
9.97 ± 0.06n |
5.62 ± 0.15a |
2.05 ± 0.03ab |
250 |
SA 150 |
8.92 ± 0.01b |
3.63 ± 0.03f |
1.74 ± 0.03ab |
500 |
SA 150 |
6.89 ± 0.01f |
1.93 ± 0.44i |
0.73 ± 0.03d |
0 |
SA 75 |
8.55 ± 0.09c |
5.20 ± 0.00c |
1.73 ± 0.03d |
250 |
SA 75 |
7.86 ± 0.01e |
4.09 ± 0.06e |
2.01 ± 0.00bc |
500 |
SA75 |
7.00 ± 0.00g |
2.42 ± 0.02h |
0.93 ± 0.03e |
Means with different letter are significantly different from each other
Chl a: Chlorophyll a
Chl b: Chloro[hyll b
Car: Carotenoid