Table 3.
Effects of lead (Pb, 150 and 300 µM) alone or in combination with methyl jasmonate (MJ, 0.5 and 1 μM) on lead (Pb) accumulation and proline content in rice plants
| Treatments (mmol g−1dw) | Pb in root (µmol g−1dw) | Pb in shoot (µmol g−1dw) | Pb in whole plant (µmol g−1dw) | Proline |
|---|---|---|---|---|
| Control | n.d | n.d | n.d | 2.09 ± 0.15f |
| 0.5 µM MJ | n.d | n.d | n.d | 2.30 ± 0.17f |
| 1 µM MJ | n.d | n.d | n.d | 1.99 ± 0.16f |
| 150 µM Pb | 1.76 ± 0.12f | 1.44 ± 0.13c | 3.20 ± 0.25c | 8.28 ± 0.40e |
| 150 µM Pb + 0.5 µM MJ | 2.09 ± 0.13e | 0.97 ± 0.11d | 3.07 ± 0.10c | 9.75 ± 0.49d |
| 150 µM Pb + 1 µM MJ | 2.35 ± 0.14d | 0.64 ± 0.11e | 2.99 ± 0.04c | 9.19 ± 0.37d |
| 300 µM Pb | 2.81 ± 0.18c | 2.46 ± 0.16a | 5.27 ± 0.06a | 11.85 ± 0.62c |
| 300 µM Pb + 0.5 µM MJ | 3.28 ± 0.16b | 1.77 ± 0.12b | 5.05 ± 0.05a | 14.38 ± 0.69b |
| 300 µM Pb + 1 µM MJ | 3.52 ± 0.17a | 0.92 ± 0.17d | 4.44 ± 0.33b | 17.64 ± 0.76a |
Values (means ± SD, n = 5) followed by the same letter are not significantly different (P < 0.05; LSD test)