In Vitro Cadmium-Induced Alterations in Growth and Oxidative Metabolism of Upland Cotton (Gossypium hirsutum L.)
Table 5
SOD activity (Ug−1FW) 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
319.51 ± 25.74a (0.00)
360.76 ± 40.14a (0.00)
433.14 ± 70.17ab (0.00)
372.77 ± 9.67a (0.00)
550
326.98 ± 54.95a (−2.34)
414.35 ± 25.90a (−14.85)
305.76 ± 12.09bc (29.41)
239.03 ± 55.04b (35.88)
700
406.67 ± 7.47a (−27.22)
332.49 ± 39.79a (7.84)
230.37 ± 24.18c (46.81)
230.37 ± 12.09b (38.20)
850
358.63 ± 64.60a (−12.24)
350.64 ± 25.52a (2.81)
443.58 ± 74.44ab (−2.41)
322.51 ± 7.25ab (13.48)
1000
372.99 ± 21.72a (−16.74)
393.36 ± 38.98a (−9.03)
509.30 ± 44.76a (−17.58)
371.59 ± 67.72a (0.32)
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.