Table 9.
CAT activity (U/gFW) of cotton callus culture (cv. YZ1) grown under various levels of cadmium.
| Cd treatment (µM) | Stress periods | |||
|---|---|---|---|---|
| 7 days | 14 days | 21 days | 28 days | |
| 0 | 2.88 ± 0.24d
(0.00) |
5.71 ± 0.14b
(0.00) |
4.57 ± 0.24c
(0.00) |
16.573 ± 22.30a
(0.00) |
| 550 | 4.76 ± 0.21b
(−65.47) |
3.24 ± 0.42c
(43.22) |
38.84 ± 5.37b
(−749.82) |
22.95 ± 5.66c
(−38.48) |
| 700 | 3.62 ± 0.25c
(−25.72) |
3.62 ± 0.27c
(36.57) |
79.17 ± 11.42a
(−1632.46) |
56.99 ± 5.37bc
(−243.89) |
| 850 | 4.95 ± 0.12b
(−72.07) |
2.28 ± 0.16d
(59.99) |
71.72 ± 15.87a
(−1469.44) |
44.77 ± 6.27c
(−170.11) |
| 1000 | 6.66 ± 0.24a
(−131.40) |
9.33 ± 0.17a
(−63.55) |
12.20 ± 2.54bc
(−167.03) |
88.88 ± 9.45b
(−436.28) |
Values are the means ± SE of three replications. Variants possessing the same letters are not statistically significant at 5% probability level. Other pieces of information are the same as in Table 1.