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

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 ± 0.00^a; (0.00)	100.00 ± 0.00^a; (0.00)	100.00 ± 0.00^a; (0.00)	100.00 ± 0.00^b; (0.00)
550	107.97 ± 9.25^a; (−7.97)	102.64 ± 18.08^a; (−2.65)	122.19 ± 13.13^a; (−22.19)	106.93 ± 18.69^ab; (−6.93)
700	133.41 ± 8.69^a; (−33.41)	92.17 ± 23.62^a; (7.83)	106.73 ± 11.22^a; (−6.73)	105.5 ± 6.26^ab; (−5.50)
850	150.35 ± 32.02^a; (−50.35)	87.07 ± 18.87^ab; (12.93)	102.63 ± 19.94^a; (−2.63)	131.41 ± 8.62^ab; (−31.41)
1000	91.79 ± 29.21^a; (8.21)	38.40 ± 3.97^b; (61.60)	90.45 ± 9.46^a; (9.55)	90.00 ± 4.69^b; (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.