Table 3. Changes in Na⁺, Ca²⁺, K⁺, Mg²⁺ and P³⁺ contents of wild and cultivated soybean roots under control and salt stress conditions.

The values are shown as mean ± SE. Different letters (A–G and a-g) mark significantly different values at P < 0.05according to Duncan’s method. W, wild soybean; C, cultivated soybean; CK, Control; L-NS, M-NS, and H-NS represent low (10 mmol L⁻¹), medium (20 mmol L⁻¹) and high (30 mmol L⁻¹) concentrations of saline salt stress, respectively; while L-AS, M-AS and H-AS represent low (10 mmol L⁻¹), medium (20 mmol L⁻¹) and high (30 mmol L⁻¹) concentrations of alkaline salt stress, respectively.

Variety	Treatment	Na+	Mg2+	Ca2+	K+	P3+
	CK	09.87 ± 0.33G	27.65 ± 0.47A	41.05 ± 1.43A	205.84 ± 2.75A	35.32 ± 1.48A
	L-NS	12.54 ± 0.00F	26.85 ± 0.87A	37.23 ± 0.25B	196.85 ± 1.94B	31.76 ± 0.60B
	M-NS	17.33 ± 0.65E	26.35 ± 0.82A	34.97 ± 0.27BC	187.60 ± 2.24C	28.95 ± 0.12C
W soybean	H-NS	24.08 ± 0.77C	23.32 ± 0.42BC	32.72 ± 0.68C	174.04 ± 1.24D	27.38 ± 0.48C
	L-AS	18.94 ± 0.42D	23.65 ± 0.94B	34.36 ± 0.59C	185.50 ± 1.98C	27.90 ± 0.31C
	M-AS	27.46 ± 0.56B	21.45 ± 0.58CD	28.22 ± 0.76D	155.77 ± 2.48E	21.12 ± 0.34D
	H-AS	33.43 ± 0.52A	20.41 ± 0.25D	25.37 ± 1.06E	144.17 ± 2.94F	18.91 ± 0.91D
	CK	08.57 ± 0.31e	26.91 ± 1.27a	44.36 ± 0.59a	194.90 ± 0.77a	30.38 ± 0.06a
	L-NS	10.22 ± 0.79de	23.26 ± 0.26b	39.55 ± 0.84b	169.73 ± 1.53b	24.56 ± 2.04b
	M-NS	11.77 ± 0.48d	20.22 ± 0.30cd	30.14 ± 1.32c	160.09 ± 1.32c	20.43 ± 0.26c
C soybean	H-NS	18.15 ± 0.56c	18.78 ± 0.28d	27.18 ± 1.00d	124.83 ± 2.59e	17.69 ± 0.27d
	L-AS	16.06 ± 0.69c	21.78 ± 0.28bc	37.27 ± 0.71b	152.19 ± 2.08d	23.62 ± 0.05b
	M-AS	21.08 ± 1.34b	16.68 ± 0.07e	23.75 ± 1.53e	117.78 ± 1.51e	18.01 ± 0.30cd
	H-AS	25.46 ± 0.56a	15.46 ± 0.84e	19.73 ± 0.08f	95.16 ± 4.90f	14.73 ± 0.68e