Table 1.
Morphological characterization of transgenic switchgrass plants
| Plant height (cm) | Leaf blade length (cm) | Leaf blade width (cm) | Leaf sheath length (cm) | Internode length (cm) | Internode diameter (mm) | Rang of internode number | Flowering time (day) | |
|---|---|---|---|---|---|---|---|---|
| Control | 242.3 ± 8.6 | 49.4 ± 3.7 | 1.24 ± 0.10 | 18.4 ± 1.6 | 21.3 ± 1.5 | 3.76 ± 0.23 | 4–6 | 92 ± 2 |
| T0-14 | 269.5 ± 10.6 | 41.0 ± 0.6 | 0.98 ± 0.05* | 12.8 ± 0.4* | 21.5 ± 1.9 | 2.63 ± 0.12** | 5–6 | 94 ± 2 |
| T0-35 | 232.8 ± 9.2 | 53.0 ± 4.8 | 1.06 ± 0.05 | 18.8 ± 2.9 | 23.1 ± 3.4 | 3.99 ± 0.18 | 4–6 | 93 ± 3 |
| T0-40 | 240.6 ± 10.1 | 52.0 ± 4.7 | 1.02 ± 0.06 | 19.0 ± 1.9 | 21.8 ± 1.4 | 4.05 ± 0.07 | 4–6 | 93 ± 2 |
| T0-27 | 108.8 ± 5.2** | 43.0 ± 1.1 | 0.53 ± 0.03** | 11.6 ± 0.5** | 20.6 ± 1.1 | 1.50 ± 0.12** | 7–8 | >360 |
| T0-32 | 117.3 ± 3.7** | 43.0 ± 2.9 | 0.65 ± 0.08** | 12.2 ± 0.5* | 19.5 ± 1.7 | 1.70 ± 0.18** | 6–8 | >360 |
| T0-37 | 110.5 ± 3.5** | 41.4 ± 1.0 | 0.52 ± 0.03** | 12.6 ± 0.9* | 19.6 ± 0.6 | 1.57 ± 0.04** | 7–8 | >360 |
| T0-34 | 36.0 ± 2.5** | 22.0 ± 1.4** | 0.35 ± 0.02** | 4.4 ± 0.2** | 7.8 ± 0.3** | 0.58 ± 0.12** | 7–8 | >360 |
| T0-44 | 27.5 ± 1.9** | 15.6 ± 0.5** | 0.29 ± 0.02** | 3.7 ± 0.3** | 4.0 ± 0.4** | 0.44 ± 0.05** | 6–8 | >360 |
*
Plant height of switchgrass was measured after 6-month growth in the greenhouse. Five-month-old tillers were used to measure internode length (internode 3), internode diameter (internode 3), internode number, leaf sheath length, leaf blade length and width. Five tillers were measured for each replicate. Value are mean ± SE (n = 3). One or two asterisks indicate significance corresponding to P < 0.05 or 0.01 (one way ANOVA, Dunnett’s test).