In Vitro Cadmium-Induced Alterations in Growth and Oxidative Metabolism of Upland Cotton (Gossypium hirsutum L.)

Table 6

H₂O₂ (μM g⁻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	71.86 ± 10.29^a; (0.00)	58.94 ± 6.46^bc; (0.00)	38.15 ± 2.55^ab; (0.00)	45.98 ± 6.20^a; (0.00)
550	45.88 ± 5.69^b; (36.16)	77.97 ± 7.95^ab; (−32.28)	35.16 ± 2.39^b; (7.84)	36.71 ± 5.43^a; (20.18)
700	58.87 ± 3.75^ab; (18.08)	81.71 ± 7.45^a; (−38.63)	36.85 ± 5.10^ab; (3.40)	37.26 ± 5.40^a; (18.98)
850	75.93 ± 6.89^a; (−5.66)	36.79 ± 5.72^d; (37.58)	46.31 ± 3.21^a; (−21.40)	39.76 ± 3.43^a; (13.54)
1000	65.34 ± 3.89^ab; (9.07)	49.97 ± 3.32^cd; (15.21)	30.43 ± 2.71^b; (20.23)	40.60 ± 6.84^a; (11.72)

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.