Table 2.
Percent tolerance index 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 | 100.00 ± 0.00a
(0.00) |
100.00 ± 0.00a
(0.00) |
100.00 ± 0.00a
(0.00) |
100.00 ± 0.00b
(0.00) |
| 550 | 107.97 ± 9.25a
(−7.97) |
102.64 ± 18.08a
(−2.65) |
122.19 ± 13.13a
(−22.19) |
106.93 ± 18.69ab
(−6.93) |
| 700 | 133.41 ± 8.69a
(−33.41) |
92.17 ± 23.62a
(7.83) |
106.73 ± 11.22a
(−6.73) |
105.5 ± 6.26ab
(−5.50) |
| 850 | 150.35 ± 32.02a
(−50.35) |
87.07 ± 18.87ab
(12.93) |
102.63 ± 19.94a
(−2.63) |
131.41 ± 8.62ab
(−31.41) |
| 1000 | 91.79 ± 29.21a
(8.21) |
38.40 ± 3.97b
(61.60) |
90.45 ± 9.46a
(9.55) |
90.00 ± 4.69b
(10.00) |
Values are the means ± SE of three replications. Variants possessing same letters are not statistically significant at 5% probability level. Other pieces of information are the same as in Table 1.