Table 2.
Growth characteristics of field‐grown rPTAG2I::DT‐A tobacco plants in 2014 and 2015
| Line | Height at flowering (cm)a (mean ± SE) | Height at harvesting (cm)b (mean ± SE) | No. of shoots released (mean ± SE) | Dry shoot biomass (g)c (mean ± SE) | Dry root biomass (g)d (mean ± SE) | Dry root: shoot biomass ratio (mean ± SE) |
|---|---|---|---|---|---|---|
| Year 2014 | ||||||
| Wild type | 99.06 ± 2.93 | 112.18 ± 1.85 | 6.25 ± 0.75 | 80.53 ± 8.18 | 26.53 ± 3.27 | 0.33 ± 0.011 |
| Line 8 (flowerless) | 103.33 ± 4.58 | 128.69 ± 2.24* | 12.0 ± 1.22* | 138.73 ± 7.62* | 52.17 ± 3.61* | 0.38 ± 0.019 |
| Line 27 (neuter) | 101.60 ± 1.47 | 122.77 ± 3.05* | 11.25 ± 1.31* | 153.60 ± 17.07* | 61.13 ± 7.88* | 0.40 ± 0.023 |
| Year 2015 | ||||||
| Wild type | 86.51 ± 2.87 | 129.54 ± 6.96 | 9.50 ± 1.55 | 142.35 ± 12.59 | 43.47 ± 3.76 | 0.31 ± 0.026 |
| Line 8 (flowerless) | 90.17 ± 3.20 | 158.12 ± 1.91* | 17.0 ± 1.73* | 272.07 ± 7.47* | 104.11 ± 3.65* | 0.38 ± 0.024 |
| Line 27 (neuter) | 84.29 ± 3.42 | 156.63 ± 4.48* | 19.16 ± 1.62* | 305.48 ± 9.8* | 97.22 ± 11.51* | 0.32 ± 0.036 |
a
Height at flowering: plant height when just starting flowering.
b
Height at harvesting: plant height when harvesting.
c
Dry shoot biomass includes all stem and branch biomass above root collar excluding foliage.
d
Dry root biomass includes all root biomass below root collar.
Data were collected from 12 replicate plants and presented as averages. Asterisks represent a significant difference when compared to wild type in the same year using two‐tailed Student's t test (P ≤ 0.05). SE, standard error.