. 2018 Jul 16;9:1425. doi: 10.3389/fmicb.2018.01425

Table 2.

Heavy metal content in sampled soils.

Origin	Site	Zn tot [mg kg⁻¹ d. w.]	Cd tot [mg kg⁻¹ d. w.]	Cu tot [mg kg⁻¹ d. w.]	Ni tot [mg kg⁻¹ d. w.]	Zn bio [mg kg⁻¹ d. w.]	Cd bio [mg kg⁻¹ d. w.]	Cu bio [mg kg⁻¹ d. w.]	Ni bio [mg kg⁻¹ d. w.]
Arabidopsis arenosa	P	8, 365 ± 570^e	251 ± 21^ef	69 ± 6ⁱ	ND ± −	350.24 ± 9.78^fg	18.36 ± 2.03^ef	0.14 ± 0.07^de	ND ± −
	N	4, 052 ± 483^f	143 ± 15^f	85 ± 4^hi	ND ± −	363.75 ± 16.04^f	13.69 ± 0.91^fg	0.18 ± 0.06^cde	ND ± −
	W	31, 942 ± 3, 456^b	5, 682 ± 715^a	316 ± 30^b	ND ± −	127.44 ± 12.13ⁱ	91.10 ± 2.73^b	0.51 ± 0.13^a	ND ± −
Arabidopsis halleri	P	28, 602 ± 2, 400^b	1, 063 ± 188^d	146 ± 2^de	ND ± −	488.30 ± 11.12^d	43.07 ± 12.2^d	0.17 ± 0.06^de	ND ± −
	N	5, 842 ± 231^ef	175 ± 11^f	159 ± 5^d	ND ± −	578.14 ± 18.56^b	23.59 ± 4.32^e	0.28 ± 0.10^bcd	ND ± −
	W	15, 969 ± 2, 930^d	1, 687 ± 282^bc	136 ± 4^e	ND ± −	133.24 ± 11.30ⁱ	44.54 ± 3.54^d	0.18 ± 0.11^cde	ND ± −
Deschampsia caespitosa	P	20, 951 ± 2, 112^c	762 ± 131^de	93 ± 3^h	ND ± −	432.85 ± 16.52^e	39.50 ± 3.70^d	0.05 ± 0.06^e	ND ± −
	N	2, 572 ± 188^f	83 ± 3^f	114 ± 9^fg	ND ± −	475.95 ± 53.16^d	18.94 ± 3.30^ef	0.35 ± 0.05^b	ND ± −
	W	29, 682 ± 3, 008^b	5, 735 ± 809^a	424 ± 13^a	ND ± −	87.08 ± 4.49^j	48.23 ± 3.46^d	0.59 ± 0.07^a	ND ± −
Silene vulgaris	P	28, 422 ± 3, 403^b	1, 140 ± 309^cd	131 ± 16^ef	ND ± −	534.65 ± 19.58^c	62.78 ± 10.22^c	0.19 ± 0.12^cde	ND ± −
	N	3, 517 ± 413^f	111 ± 11^f	73 ± 5ⁱ	ND ± −	243.85 ± 21.26^h	10.88 ± 2.53^fg	0.16 ± 0.12^de	ND ± −
	W	3, 581 ± 179^f	223 ± 12^ef	98 ± 3^gh	ND ± −	11.87 ± 2.43^k	6.32 ± 1.84^g	0.22 ± 0.04^bcd	ND ± −
Bulk soil	P	38, 594 ± 848^a	1, 722 ± 319^b	197 ± 10^c	ND ± −	700.24 ± 52.35^a	63.40 ± 7.22^c	0.19 ± 0.05^cde	ND ± −
	N	2, 538 ± 89^f	77 ± 4^f	72 ± 8ⁱ	ND ± −	319.40 ± 18.24^g	12.18 ± 1.44^fg	0.32 ± 0.14^bc	ND ± −
	W	29, 705 ± 4, 253^b	6, 021 ± 412^a	313 ± 18^b	ND ± −	158.54 ± 7.40ⁱ	102.10 ± 5.76^a	0.32 ± 0.02^bc	ND ± −

The data represent the means and standard deviations of three replicates. P, N, W indicate individual sampling sites. Different letters (within each group) indicate significant differences (P < 0.05, LSD test) considering sample origin and sampling site (Two-way ANOVA); ND indicates that trait was not detected.