Table II.
Root architectural transformations in response to nitrogen limitation
Root system architectural changes with nitrogen starvation (2 and 5 d after initiation of starvation). The length and number of lateral roots (Lat. Rt.) and root hairs (Rt. Hairs; per millimeter of primary root) were determined. Results show mean values (±sd) from measurements on 10 plants for each treatment.
| Nitrogen | Lat. Rt. No. | Lat. Rt. Length | Rt. Hair No. | Rt. Hair Length |
|---|---|---|---|---|
| 2 d after Treatment | ||||
| Minus | 6.5 ± 2.0 | 0.78 ± 0.12 cm | 33.7 ± 2.6 | 0.52 ± 0.06 mm |
| Plus | 4.6 ± 1.6 | 0.45 ± 0.06 cm | 30.6 ± 2.2 | 0.19 ± 0.04 mm |
| 5 d after Treatment | ||||
| Minus | 12.9 ± 2.1 | 1.37 ± 0.20 cm | 52.1 ± 3.3 | 0.74 ± 0.08 mm |
| Plus | 7.5 ± 1.4 | 0.48 ± 0.05 cm | 41.2 ± 3.0 | 0.23 ± 0.04 mm |