Table 1.
Morphological characterization of PvSPL2SRDX-overexpressing transgenic switchgrass plants
| Plant height (cm) | Internode length (cm) | Internode diameter (mm) | Internode number | Leaf blade length (cm) | Leaf blade width (cm) | Flowering time (day) | |
|---|---|---|---|---|---|---|---|
| Control plants | 136.7 ± 5.7 | 17.9 ± 0.8 | 2.31 ± 0.19 | 4–5 | 30.1 ± 3.3 | 0.79 ± 0.07 | 108 ± 4 |
| TPvSPL2SRDX1 | 130.1 ± 4.4 | 18.8 ± 0.5 | 2.07 ± 0.33 | 4–5 | 28.3 ± 1.3 | 0.64 ± 0.10 | 107 ± 6 |
| TPvSPL2SRDX2 | 137.9 ± 6.1 | 19.3 ± 2.0 | 1.93 ± 0.47 | 4–5 | 34.7 ± 3.7 | 0.74 ± 0.09 | 99 ± 2 |
| TPvSPL2SRDX3 | 132.8 ± 7.3 | 17.1 ± 1.3 | 2.27 ± 0.09 | 4–5 | 37.2 ± 4.0 | 0.82 ± 0.13 | 100 ± 5 |
| TPvSPL2SRDX4 | 83.2 ± 4.7* | 13.6 ± 0.7* | 2.43 ± 0.27 | 4–5 | 20.3 ± 1.7* | 0.87 ± 0.17 | 106 ± 4 |
| TPvSPL2SRDX5 | 78.7 ± 5.8* | 11.7 ± 1.1* | 2.70 ± 0.37 | 4–5 | 21.2 ± 1.5* | 0.81 ± 0.07 | 103 ± 3 |
| TPvSPL2SRDX6 | 81.5 ± 6.9* | 12.9 ± 1.5* | 2.38 ± 0.13 | 4–5 | 19.0 ± 2.3* | 0.84 ± 0.05 | 107 ± 2 |
Plant height of switchgrass was measured after 4-month growth in the greenhouse. The 4-month-old tillers were used to measure internode length (internode 3), internode diameter (internode 3), internode number, and leaf blade length and width. Five tillers were measured for each replicate. Control plants were produced with pANIC6B empty vector from the same batch of experiment. Values are mean ± SE (n = 3)
* Significance corresponding to P < 0.05 (One-way ANOVA, Dunnett’s test)