Table 2.
Effects of lead (Pb, 150 and 300 µM) alone or in combination with methyl jasmonate (MJ, 0.5 and 1 μM) on height, total dry weight, photosynthetic pigments and chlorophyll florescence in rice plants
| Treatments | Height (cm) | TDW (g) | Chlorophyll a (mg g−1 fw) |
Chlorophyll b | Carotenoids | Fv/Fm |
|---|---|---|---|---|---|---|
| Control | 45.18 ± 1.03a | 4.29 ± 014ab | 2.44 ± 0.12a | 1.83 ± 0.11bc | 0.272 ± 0.017abc | 0.656 ± 0.013a |
| 0.5 µM MJ | 43.95 ± 1.32ab | 4.40 ± 0.14ab | 2.42 ± 0.13a | 2.04 ± 0.08a | 0.293 ± 0.016ab | 0.646 ± 0.014a |
| 1 µM MJ | 44.84 ± 1.70a | 4.47 ± 0.22a | 2.39 ± 0.22a | 2.00 ± 0.14ab | 0.298 ± 0.017a | 0.655 ± 0.013a |
| 150 µM Pb | 37.37 ± 1.58d | 3.83 ± 0.08c | 1.74 ± 0.13d | 1.63 ± 0.10d | 0.223 ± 0.011d | 0.574 ± 0.014c |
| 150 µM Pb + 0.5 µM MJ | 39.37 ± 1.01cd | 4.19 ± 0.16b | 2.08 ± 0.11bc | 1.66 ± 0.14 cd | 0.263 ± 0.022c | 0.614 ± 0.009b |
| 150 µM Pb + 1 µM MJ | 42.06 ± 1.49b | 4.17 ± 0.12b | 2.26 ± 0.06ab | 1.91 ± 0.07ab | 0.268 ± 0.021bc | 0.619 ± 0.009b |
| 300 µM Pb | 29.71 ± 0.76f | 3.21 ± 0.11d | 1.25 ± 0.09e | 0.92 ± 0.10f | 0.165 ± 0.016e | 0.420 ± 0.010f |
| 300 µM Pb + 0.5 µM MJ | 34.45 ± 0.89e | 3.65 ± 0.13c | 1.84 ± 0.12d | 1.36 ± 0.11e | 0.225 ± 0.009d | 0.484 ± 0.013e |
| 300 µM Pb + 1 µM MJ | 39.55 ± 0.95c | 3.74 ± 0.15c | 1.90 ± 0.18 cd | 1.43 ± 0.11e | 0.256 ± 0.007c | 0.530 ± 0.013d |
Values (means ± SD, n = 5) followed by the same letter are not significantly different (P < 0.05; LSD test)