Table 2.
Rop2 Affects Root Hair Length
| Type of Plant |
No. of Hairs <40 μma |
Length of Mature Root Hairs (μm)b
|
||
|---|---|---|---|---|
| Minimum | Maximum | Mean | ||
| Wild type | 3.0 ± 2.3 | 63 | 625 | 351 ± 127 |
| Rop2 OX | 2.5 ± 1.7 | 200 | 1050 | 577 ± 188 |
| CA-rop2 | 1.2 ± 1.5 | 213 | 850 | 516 ± 126 |
| DN-rop2 | 10.1 ± 4.3 | 50 | 588 | 197 ± 118 |
a
Per millimeter of primary root. Hairs were counted on a 2-mm portion of each of nine primary roots. For DN-rop2, hairs were counted on a 1-mm portion of each of 27 primary roots.
b
Hairs <40 μm long were excluded. Ten hairs were measured on a 2-mm portion of each of nine primary roots. For DN-rop2, 10 hairs were measured on a 1-mm portion of each of 27 primary roots. Mature hairs were measured on regions of root approximately the same distance from the root tip. The longest hairs in these regions were all of similar length. This indicated that the hairs had stopped elongating.