Pb treatment (mg kg-1) TF (%) Root BCF (%) Shoot BCF (%) Control Act12 ⊿Ctrl (%) Control Act12 ⊿Ctrl (%) Control Act12 ⊿Ctrl (%) 0 24.11 ± 1.45a 24.76 ± 1.61a 2.7 7.55 ± 0.20a 7.72 ± 0.26a 2.3 1.82 ± 0.11a 1.91 ± 0.1a 5.0 200 27.91 ± 0.09b 33.45 ± 0.51b 19.9* 6.97 ± 0.12b 9.46 ± 0.03b 35.8* 1.94 ± 0.03b 3.16 ± 0.04b 62.7* 300 22.06 ± 0.2c 24.56 ± 0.57a 11.3* 7.16 ± 0.05b 14.99 ± 0.09c 109.4* 1.58 ± 0.01c 3.68 ± 0.1c 133.1* 500 14.47 ± 0.17d 19.72 ± 0.18c 36.2* 11.00 ± 0.10c 15.10 ± 0.18c 37.3* 1.59 ± 0.02c 2.98 ± 0.04d 87.0* 1,000 16.4 ± 0.24e 18.13 ± 0.07d 10.5* 12.43 ± 0.33d 18.86 ± 0.15d 51.7* 2.04 ± 0.02d 3.42 ± 0.03e 67.7*

Table 3: Average translocation factor (TF) and bioaccumulation coefficient (BCF) of perennial ryegrass plants in Pb-treated soil inoculated with or without Streptomyces pactum Act12 (means ± SD, n = 3).