Table 1.
Genotype | Clipper | Sahara | ||
---|---|---|---|---|
Treatment | Control | Salt | Control | Salt |
Region 1 (mm) | 0–1.0 | 0–1.0 | 0–1.0 | 0–0.5 |
Region 2 (mm) | 1.0 – 3.5 | 1.0–3.0 | 1.0–3.0 | 0.5–2.5 |
Region 3 (mm) | 3.5–5.5 | 3.0 – 5.0 | 3.0–5.0 | 2.5–4.5 |
Final cortical cell length (μm) | 141.9±8.5a | 143.4±11.6a | 108.8±3.9a | 220.5±15.0b |
The length of each region was defined by the following: region 1, root cap and cortical cells dividing; region 2, cortical cells expanding; and region 3, cortical cells ceased expansion and the length became uniform. The final cortical cell length shown is the mean ± SEM (n = 8–10). Different superscript letters indicate significance between the salt treatment relative to control and between genotypes (two-way ANOVA, Bonferroni post-hoc test, P < 0.001).