Chromium (VI) Uptake and Tolerance Potential in Cotton Cultivars: Effect on Their Root Physiology, Ultramorphology, and Oxidative Metabolism

Table 1

Growth performance of both transgenic cotton cultivars and their hybrid line under chromium stress.

Variety		Growth performance
	Cr levels (μM)	Length (cm/plant)		Biomass (g/plant)		Growth inhibition
		Root	Shoot	Fresh	Dry	Fresh biomass	Dry biomass
J208	0	35.83 ± 2.57^a	47.20 ± 3.93^a	8.32 ± 1.55^a	0.67 ± 0.23^a	0.00 ± 0.00^b	0.00 ± 0.00^c
	10	31.37 ± 1.70^b	44.57 ± 2.29^a	5.21 ± 1.35^b	0.43 ± 0.22^ab	34.61 ± 24.51^ab	37.93 ± 20.69^b
	50	24.00 ± 2.00^c	34.43 ± 2.67^b	3.85 ± 1.74^bc	0.21 ± 0.00^b	49.59 ± 33.52^a	66.33 ± 10.48^a
	100	17.60 ± 2.75^d	30.00 ± 1.74^b	2.34 ± 1.06^c	0.19 ± 0.00^b	69.41 ± 20.37^a	69.54 ± 9.48^a
Z905	0	22.67 ± 2.52^a	30.20 ± 1.71^a	7.06 ± 2.16^a	0.50 ± 0.13^a	0.00 ± 0.00^c	0.00 ± 0.00^c
	10	18.83 ± 1.76^b	24.57 ± 2.38^b	3.82 ± 1.47^b	0.35 ± 0.10^ab	45.88 ± 11.98^b	28.71 ± 18.05^b
	50	10.07 ± 0.90^c	22.17 ± 3.82^b	1.95 ± 0.77^bc	0.19 ± 0.10^bc	69.26 ± 16.39^a	62.29 ± 13.42^a
	100	6.67 ± 0.76^d	14.60 ± 1.22^c	0.78 ± 0.30^c	0.10 ± 0.05^c	87.76 ± 7.64^a	79.57 ± 8.04^a
ZD14	0	27.33 ± 2.52^a	41.57 ± 3.98^a	6.53 ± 2.10^a	0.45 ± 0.18^a	0.00 ± 0.00^c	0.00 ± 0.00^b
	10	24.87 ± 3.80^ab	42.60 ± 2.85^a	3.66 ± 0.44^b	0.35 ± 0.10^ab	38.72 ± 25.55^b	16.26 ± 29.45^ab
	50	20.33 ± 2.52^bc	32.87 ± 1.21^b	2.40 ± 0.49^bc	0.27 ± 0.10^ab	59.05 ± 20.08^ab	32.88 ± 37.45^ab
	100	17.40 ± 1.51^c	27.50 ± 2.30^c	1.23 ± 0.50^c	0.17 ± 0.05^b	80.69 ± 7.92^a	58.25 ± 17.23^a

Values are the means ± SD of three replications. Variants possessing the same letter are not statistically significant at 𝑃<0.05.