Table 1.
Comparison of Transgenic and Wild-Type Roots
| Plant Line | Mean Root Length (mm) |
Percentage of Wild Type |
sd (mm) | n | ||||
|---|---|---|---|---|---|---|---|---|
| Transgenic | 9.0 | 164a | 6.4 | 473 | ||||
| Wild type | 5.5 | — | 1.8 | 54 | ||||
| Mean Cell Length (μm)b
|
Mean Cell Diameter (μm)b
|
|||||||
| Cell Type | Transgenic | Percentage of Wild Type |
sd | Wild Type | sd | Transgenic | Percentage of Wild Type | Wild Type |
| Epidermal | 157.0a | 173 | 24.0 | 91.0 | 21.0 | 14.8 | 103 | 14.0 |
| Cortex | 146.0a | 151 | 21.0 | 97.0 | 16.0 | 28.0 | 116 | 24.0 |
| Endodermal | 107.0a | 130 | 21.0 | 82.0 | 17.0 | 15.9 | 98 | 16.0 |
| Mean Lateral Rootsc
|
Mean Root Apical Growthc
|
Mean Lateral Roots Initiated/Plantd
|
||||||
| Plant Line | Percentage with Lateral Roots |
Lateral Roots/ Plant |
Rate (μm/day) | Percentage of Wild Type | +IAAe | −IAA | ||
| Wild type | 77 | 8.5 | 505 | 100 | N.D.f | 8.75 | ||
| Transgenic | 16a | 1.0a | 750a | 149a | 10.0 | 2.33a | ||
a
Significantly different from the wild type at P ≤ 0.05.
b
n, wild type = 8 plants; transgenic = 6 plants; ≥5 cells each plant.
c
n, wild type and transgenic ≥ 22; these lateral roots are all fully developed.
d
n, wild type = 8; transgenic = 15 (−IAA) or 4 (+IAA).
e
IAA concentration = 10−11 M.
f
N.D., not determined.