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

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 ± 0.24^d; (0.00)	5.71 ± 0.14^b; (0.00)	4.57 ± 0.24^c; (0.00)	16.573 ± 22.30^a; (0.00)
550	4.76 ± 0.21^b; (−65.47)	3.24 ± 0.42^c; (43.22)	38.84 ± 5.37^b; (−749.82)	22.95 ± 5.66^c; (−38.48)
700	3.62 ± 0.25^c; (−25.72)	3.62 ± 0.27^c; (36.57)	79.17 ± 11.42^a; (−1632.46)	56.99 ± 5.37^bc; (−243.89)
850	4.95 ± 0.12^b; (−72.07)	2.28 ± 0.16^d; (59.99)	71.72 ± 15.87^a; (−1469.44)	44.77 ± 6.27^c; (−170.11)
1000	6.66 ± 0.24^a; (−131.40)	9.33 ± 0.17^a; (−63.55)	12.20 ± 2.54^bc; (−167.03)	88.88 ± 9.45^b; (−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.