Table 2.
Heavy metal concentrations in plants from different bermudagrass populations.
| Total concentrations (mg kg-1, DW) | Tissue | LY-polluted | LY-un-polluted | ZZ-polluted | ZZ-un-polluted | XT-polluted | XT-un-polluted | YY-polluted | YY-un-polluted |
|---|---|---|---|---|---|---|---|---|---|
| Zn | Root | 3007 ± 348 a | 847 ± 283 b | 3047 ± 32 a | 1581 ± 339 b | 530 ± 80 b | 658 ± 85 b | 1403 ± 323 b | 888 ± 125 b |
| Stolon | 2673 ± 288 b | 1022 ± 204 bc | 3818 ± 47 a | 1454 ± 233 bc | 591 ± 93 c | 510 ± 36 c | 1394 ± 365 bc | 1043 ± 199 bc | |
| Stem | 2514 ± 388 a | 633 ± 76 b | 2745 ± 37 a | 1461 ± 306 b | 633 ± 64 b | 628 ± 59 b | 1517 ± 130 b | 969 ± 120 b | |
| Leaf | 1789 ± 275 b | 401 ± 47 c | 3334 ± 137 a | 1237 ± 214 bc | 417 ± 41 c | 428 ± 45 c | 1320 ± 131 bc | 452 ± 59 c | |
| Cd | Root | 136 ± 21 a | 8 ± 3 c | 129 ± 3 a | 21 ± 3 c | 79 ± 4 b | 7 ± 0.6 c | NDa | ND |
| Stolon | 34 ± 9 a | 5 ± 1 c | 27 ± 1 a | 8 ± 1 c | 17 ± 1 b | 5 ± 0.2 c | ND | ND | |
| Stem | 28 ± 6 a | 4 ± 0.3 c | 22 ± 1 a | 6 ± 1 c | 14 ± 0.5 b | 2 ± 0.4 c | ND | ND | |
| Leaf | 20 ± 4 a | 3 ± 0.2 c | 17 ± 0.5 a | 5 ± 1 bc | 10 ± 1 b | 2 ± 0.1 c | ND | ND | |
| Pb | Root | 165 ± 44 b | 54 ± 10 c | 231 ± 30 a | 65 ± 6 c | ND | ND | 96 ± 20 c | 28 ± 3 d |
| Stolon | 56 ± 8 a | 29 ± 6 b | 54 ± 6 a | 38 ± 9 b | ND | ND | 63 ± 15 a | 21 ± 4 b | |
| Stem | 50 ± 3 b | 27 ± 1 bc | 94 ± 2 a | 46 ± 1 b | ND | ND | 31 ± 1 bc | 11 ± 1 c | |
| Leaf | 39 ± 9 a | 26 ± 2 b | 40 ± 4 a | 37 ± 5 a | ND | ND | 27 ± 3 b | 8 ± 2 c | |
aND means not detected. The data represent means ± standard error (SE, n = 5). Means in a column for a kind of metal followed by the same lower-case letter were not significantly different based on Fisher’s protected LSD test (P < 0.05). LY, ZZ, XT, and YY mean Liuyang, Zhuzhou, Xiangtan, and Yueyang City, respectively.