Pb concentration and uptake

Pb treatment (mg kg^{^-1})		Pb concentration (mg kg^-1)		Pb uptake (μg pot^-1)		Bioavailable soil Pb (mg kg^-1)
Pb treatment (mg kg^{^-1})		Shoot	Root	Shoot	Root	Bioavailable soil Pb (mg kg^-1)
0	Control	1.53 ± 0.13^a	6.35 ± 0.48^a	31.71 ± 3.89^a	50.23 ± 3.69^a	32.13 ± 0.51^a
	Act12	1.61 ± 0.17^a	6.51 ± 0.82^a	35.44 ± 2.90^a	57.15 ± 3.51^a	34.84 ± 1.09^a
	⊿Ctrl (%)	5.0	2.5	11.8	13.8	8.4*
200	Control	5.49 ± 0.46^b	19.70 ± 1.59^b	131.34 ± 16.95^b	157.45 ± 15.93^b	73.39 ± 3.26^b
	Act12	8.88 ± 0.86^b	26.51 ± 2.16^b	174.45 ± 13.95^b	311.98 ± 35.27^b	85.32 ± 2.93^b
	⊿Ctrl (%)	61.7*	34.8*	33.6*	98.1*	16.3*
300	Control	6.01 ± 0.52^b	27.27 ± 2.57^b	152.65 ± 12.34^b	306.29 ± 23.16^c	123.98 ± 8.95^c
	Act12	13.86 ± 1.14^c	56.51 ± 5.89^c	376.02 ± 29.18^c	837.42 ± 67.95^c	165.86 ± 3.99^c
	⊿Ctrl (%)	130.4*	107.2*	146.3*	173.4*	33.8*
500	Control	9.16 ± 0.82^c	63.25 ± 5.26^c	281.56 ± 12.40^c	876.86 ± 106.84^d	231.06 ± 22.33^d
	Act12	17.12 ± 1.33^d	86.83 ± 6.93^d	423.68 ± 35.63^c	1195.69 ± 112.15^d	317.05 ± 2.88^d
	⊿Ctrl (%)	86.9*	37.3*	50.5*	36.4*	37.2*
1,000	Control	21.88 ± 2.04^d	133.51 ± 14.31^d	540.94 ± 31.40^d	1682.01 ± 98.57^e	370.87 ± 11.76^e
	Act12	36.45 ± 2.65^e	201.10 ± 15.12^e	1178.72 ± 110.24^d	2530.10 ± 231.38^e	418.71 ± 16.33^e
	⊿Ctrl (%)	66.6*	50.6*	117.9*	50.4*	13.1*

Table 2: Pb concentration and uptake in perennial ryegrass plants, and bioavailable soil Pb in Pb-treated soil inoculated with or without Streptomyces pactum Act12 (means ± SD, n = 3).