Table IV.
Polar auxin transport in stems of rice plants
Four-centimeter stem segments of 4-week-old wild-type and OX plants were incubated in [3H]IAA solution for 3 h, and segments were further divided into four sections of 1 cm each. Section 1 was submerged in [3H]IAA solution, and section 4 indicates the farthest section. The data are means ± sd (n = 6 plants). All values of wild-type plants are significantly different from those of OX lines (P < 0.05, Fisher's protected lsd test).
| Treatment and Plant | [3H]IAA in Stem Section
|
|||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| cpm | ||||
| Basipetal (without NPA) | ||||
| Wild type | 291,451 ± 9,472 | 33,645 ± 5,142 | 5,268 ± 426 | 1,271 ± 45 |
| OX1 | 286,412 ± 9,112 | 20,348 ± 3,751 | 3,457 ± 415 | 745 ± 75 |
| OX2 | 289,231 ± 9,282 | 20,521 ± 3,695 | 3,507 ± 395 | 761 ± 57 |
| Basipetal (with 100 μm NPA) | ||||
| Wild type | 290,122 ± 9,108 | 2,933 ± 458 | 590 ± 68 | 280 ± 30 |
| OX1 | 281,332 ± 10,102 | 2,065 ± 216 | 414 ± 43 | 198 ± 21 |
| OX2 | 287,385 ± 9,514 | 2,202 ± 254 | 408 ± 52 | 207 ± 24 |