Table 1.

Effects of different drought stress induced by polyethylene glycol (PEG-6000) treatments on the biomasses and root/shoot ratios of XM (high-grain Cadmium (Cd)-accumulating genotype) and YM (low-grain Cd-accumulating genotype) under 100 µmol L⁻¹ of Cd stress.

Treatment	Dry Biomass (g)			Root/Shoot Ratio
	Roots	Shoots	Whole Plant
Cd-only XM	0.070 ± 0.02 a	0.263 ± 0.04 a	0.332 ± 0.12 a	0.274 ± 0.03 d
Cd-only YM	0.057 ± 0.01 a	0.212 ± 0.03 ab	0.269 ± 0.04 abc	0.270 ± 0.02 d
Cd + 5% PEG-6000-XM	0.064 ± 0.00 a	0.196 ± 0.01 ab	0.260 ± 0.01 abc	0.328 ± 0.03 cd
Cd + 5% PEG-6000-YM	0.068 ± 0.01 a	0.211 ± 0.05 ab	0.279 ± 0.06 ab	0.326 ± 0.02 cd
Cd + 10% PEG-6000-XM	0.061 ± 0.00 a	0.150 ± 0.02 bc	0.210 ± 0.02 bc	0.410 ± 0.06 c
Cd + 10% PEG-6000-YM	0.053 ± 0.00 a	0.146 ± 0.02 bc	0.199 ± 0.02 bc	0.369 ± 0.04 c
Cd + 15% PEG-6000-XM	0.069 ± 0.01 a	0.107 ± 0.01 c	0.176 ± 0.02 c	0.652 ± 0.10 a
Cd + 15% PEG-6000-YM	0.060 ± 0.00 a	0.111 ± 0.01 c	0.171 ± 0.01 c	0.539 ± 0.02 b
Significance based on two-way ANOVA (p-value)
Varieties	0.118	0.314	0.232	0.077
Stress Level	0.381	0.000	0.000	0.000
Varieties * Stress Level	0.442	0.057	0.100	0.208

Data are presented as the mean ± SD (n = 3). The different letters indicate significant differences at p < 0.05 according to a least significant difference (LSD) test. * means the interaction between Varieties and Stress level.