TABLE 2.

Plant dry weight, Pb concentrations, and bioconcentration factor of Pb in various tissues of Robinia pseudoacacia seedlings in response to different Pb levels (0, 90, 900, and 3,000 mg Pb kg^–1 soil) for 4 months.

Plant	Pb(II) level		Dry weight	Plant Pb	Bioconcentration
tissue	(mg kg–1)	AMF	(g plant–1)	(mg kg–1, DW)	factor
Roots	0	−M	1.99 ± 0.03c	0.61 ± 0.03g	0.09 ± 0.01f
		+M	2.27 ± 0.06b	0.56 ± 0.03g	0.08 ± 0.01f
	90	−M	2.44 ± 0.11b	78.98 ± 0.56f	0.88 ± 0.02b
		+M	2.87 ± 0.28a	101.44 ± 2.16e	1.13 ± 0.02a
	900	−M	1.51 ± 0.15de	253.81 ± 9.91d	0.28 ± 0.02d
		+M	1.72 ± 0.02de	496.69 ± 5.96c	0.56 ± 0.02c
	3,000	−M	1.19 ± 0.02f	666.93 ± 24.51b	0.22 ± 0.02e
		+M	1.37 ± 0.06ef	810.77 ± 9.98a	0.27 ± 0.02d
Stems	0	−M	0.58 ± 0.02d	0.25 ± 0.02f	0.04 ± 0.01g
		+M	0.66 ± 0.02c	0.19 ± 0.02f	0.03 ± 0.01g
	90	−M	0.78 ± 0.03b	27.60 ± 1.11e	0.31 ± 0.01b
		+M	0.85 ± 0.03a	29.15 ± 1.45e	0.32 ± 0.01a
	900	−M	0.51 ± 0.01e	79.09 ± 1.43d	0.09 ± 0.01d
		+M	0.56 ± 0.01d	118.66 ± 5.54c	0.13 ± 0.01c
	3,000	−M	0.32 ± 0.01f	158.28 ± 6.21b	0.05 ± 0.01f
		+M	0.33 ± 0.01f	182.02 ± 3.23a	0.07 ± 0.01e
Leaves	0	−M	2.16 ± 0.03c	0.14 ± 0.01f	0.02 ± 0.01e
		+M	2.33 ± 0.02b	0.13 ± 0.02f	0.02 ± 0e
	90	−M	2.29 ± 0.01bc	18.61 ± 1.15e	0.21 ± 0.01a
		+M	2.48 ± 0.16a	16.33 ± 1.40e	0.18 ± 0.01b
	900	−M	1.35 ± 0.11e	50.84 ± 2.87c	0.06 ± 0.01c
		+M	1.55 ± 0.06d	39.99 ± 1.67d	0.04 ± 0d
	3,000	−M	1.14 ± 0.06f	101.72 ± 2.01a	0.03 ± 0.01d
		+M	1.35 ± 0.04e	66.08 ± 4.19b	0.02 ± 0.01e

AMF, arbuscular mycorrhizal fungus Funneliformis mosseae; +M, inoculated group; −M, non-inoculated group. Shown are means ± SD (n = 3). Different letters within each group indicate significant differences among different Pb levels between inoculated and non-inoculated treatment (P < 0.05; ANOVA with post hoc Duncan).