Table I.
Developmental stage of wild-type and transgenic (over-expressing γ-ECS in the cytosol, line ggs 28) poplar after H2S exposure
| Wild Type | Wild Type | Transgenic | Transgenic | |
|---|---|---|---|---|
| 0 μL L−1 H2S | 0.25 μL L−1 H2S | 0 μL L−1 H2S | 0.25 μL L−1 H2S | |
| Shoot fresh wt (g) | 5.0 ± 1.5a | 5.4 ± 1.3a,b | 6.4 ± 1.6b,c | 6.8 ± 2.2c |
| Root fresh wt (g) | 1.2 ± 0.6a | 1.7 ± 0.5a | 1.7 ± 0.5a | 2.0 ± 0.9a |
| Shoot to root ratio | 3.7 ± 0.6a | 3.3 ± 0.4a | 3.6 ± 0.5a | 3.6 ± 0.4a |
| Shoot (fresh wt/dry wt) | 4.7 ± 0.3a | 4.8 ± 0.6a | 4.4 ± 0.2a | 4.7 ± 0.6a |
| Root (fresh wt/dry wt) | 9.9 ± 1.4a | 9.9 ± 2.5a | 10.0 ± 1.1a | 10.3 ± 0.9a |
| Plants height (cm) | 18.3 ± 3.0a | 20.8 ± 3.7a | 22.5 ± 3.9a,b | 25.5 ± 4.4b |
| No. of leaves | 13 ± 2a | 13 ± 1a | 14 ± 3a | 15 ± 2a |
Transgenic and wild-type poplar from one batch of micropropagated trees were either exposed to 0 or 0.25 μL L−1 H2S for 48 h during a 3-week period of the experiments. The data shown are means ± sd of seven to 14 plants of each poplar line and each treatment. Significant differences at P < 0.05 between treatments are indicated with different indices.