Table 3.
Sodium (Na+) and chloride (Cl−) ion concentration in Citrus spp. leaf and root (root orders 1–6) tissues under fresh water (Control) and salinity (90 mM NaCl)
| Organ | Ion concentration in tissues (mg g d.wt−1) |
|||
| Control |
Salt |
|||
| Na+ | Cl− | Na+ | Cl− | |
| Leaves | 1.02±0.10 a | 1.82±0.10 a | 7.49±0.09 a,b | 6.04±0.03 b,c |
| First-order roots | 7.95±1.35 b | 6.84±2.07 b | 10.86±2.98 a | 13.65±4.08 a |
| Second-order roots | 8.19±1.64 b | 7.14±1.22 b | 9.39±1.92 a | 12.84±2.48 a,b |
| Third-order roots | 5.79±1.31 b | 6.21±0.38 b | 6.08±1.48 a,b | 10.38±1.70 a,b,c |
| Fouth-order roots | 2.12±0.39 a | 3.86±0.36 ab | 3.36±0.22 b | 6.45±0.28 a,b |
| Fifth-order roots | 1.08±0.32 a | 2.19±0.22 a | 2.51±0.04 b | 4.62±0.31 c |
| Sixth-order roots | 0.99±0.18 a | 2.00±0.16 a | 2.12±0.03 b | 3.68±0.27 c |
Different lower letters denote differences within columns (mean ±SE; Tukey, P < 0.05, n=3–10); see Supplementary Table S1 at JXB online for ANOVA results on the influence of treatment and root order on the ion concentrations.