Table I.
The main organic and inorganic solutes occurring in L. latifolium
Three-month-old seedlings were treated or not for 10 d with 300 mm NaCl. Free amino acids, quaternary ammonium compounds (QACs), nonstructural carbohydrates (NSCs), cyclitols, organic acids, Na+, K+, NO3−, and Cl− were determined separately for shoots and roots. Values are means of three replicates ± se. % Total, Percentage of the amount of individual compounds with respect to the total amount of solutes determined; OS, organic solutes; DW, dry weight. Bold values represent the total amounts of solutes and corresponding percentages per biochemical families.
| Compound | Shoots
|
Roots
|
||||||
|---|---|---|---|---|---|---|---|---|
| Control | Salinized | Control | Salinized | |||||
| μmol g−1 DW | % Total | μmol g−1 DW | % Total | μmol g−1 DW | % Total | μmol g−1 DW | % Total | |
| Gln | 84.0 ± 6.9 | 2.6 | 32.8 ± 3.5 | 0.8 | 80.6 ± 10.0 | 2.8 | 26.4 ± 4.0 | 0.7 |
| Glu | 9.9 ± 2.0 | 0.3 | 6.6 ± 1.3 | 0.2 | 8.8 ± 1.3 | 0.3 | 5.9 ± 1.3 | 0.2 |
| β-Ala | 0.6 ± 0.5 | 0.0 | 0.5 ± 0.1 | 0.0 | 0.5 ± 0.2 | 0.0 | 0.6 ± 0.5 | 0.0 |
| Pro | 38.3 ± 6.8 | 1.2 | 76.0 ± 5.3 | 1.8 | 18.7 ± 3.5 | 0.6 | 65.7 ± 3.9 | 1.8 |
| Other amino acids | 24.1 ± 2.8 | 0.7 | 24.5 ± 2.1 | 0.6 | 32.5 ± 1.1 | 1.1 | 26.3 ± 3.7 | 0.7 |
| Σ amino acids | 156.8 ± 7.4 | 4.9 | 140.4 ± 4.7 | 3.3 | 141.2 ± 5.8 | 4.9 | 125.0 ± 10.2 | 3.5 |
| β-AB | 50.0 ± 3.7 | 1.6 | 44.0 ± 8.3 | 1.0 | 16.9 ± 2.3 | 0.6 | 19.0 ± 2.6 | 0.5 |
| Cho | 9.8 ± 1.4 | 0.3 | 8.0 ± 1.5 | 0.2 | 6.0 ± 3.1 | 0.2 | 4.0 ± 1.7 | 0.1 |
| COS | 52.1 ± 5.8 | 1.6 | 49.0 ± 7.2 | 1.2 | 37.0 ± 12.4 | 1.3 | 41.1 ± 3.1 | 1.1 |
| Σ QACs | 111.9 ± 7.8 | 3.5 | 101.0 ± 16.9 | 2.4 | 59.9 ± 17.4 | 2.1 | 64.2 ± 6.8 | 1.8 |
| Suc | 221.2 ± 40.4 | 6.9 | 259.4 ± 48.2 | 6.1 | 258.1 ± 63.7 | 8.9 | 462.8 ± 131.4 | 12.9 |
| Fru | 19.3 ± 3.5 | 0.6 | 45.0 ± 11.0 | 1.1 | 60.1 ± 5.9 | 2.1 | 99.5 ± 22.3 | 2.8 |
| Glc | 29.8 ± 2.8 | 0.9 | 67.4 ± 16.5 | 1.6 | 92.3 ± 15.4 | 3.2 | 130.5 ± 36.0 | 3.6 |
| c-Inos | 56.0 ± 4.6 | 1.7 | 102.1 ± 15.5 | 2.4 | 7.2 ± 0.8 | 0.2 | 21.3 ± 8.2 | 0.6 |
| m-Inos | 13.6 ± 1.6 | 0.4 | 15.0 ± 3.3 | 0.4 | 2.8 ± 0.2 | 0.1 | 6.7 ± 2.0 | 0.2 |
| Σ NSCs and cyclitols | 339.9 ± 41.0 | 10.5 | 488.8 ± 41.2 | 11.6 | 420.5 ± 64.1 | 14.4 | 721.0 ± 185.0 | 20.1 |
| Malate | 68.0 ± 11.0 | 2.1 | 34.0 ± 4.0 | 0.8 | 35.0 ± 8.0 | 1.2 | 24.0 ± 6.0 | 0.7 |
| Citrate | 77.0 ± 4.0 | 2.4 | 53.0 ± 6.0 | 1.3 | 55.0 ± 7.0 | 1.9 | 17.0 ± 2.0 | 0.5 |
| Other organic acids | 12.0 ± 0.7 | 0.4 | 9.0 ± 0.7 | 0.2 | 11.0 ± 0.9 | 0.4 | 6.0 ± 0.3 | 0.2 |
| Σ organic acids | 157.0 ± 9.6 | 4.9 | 96.0 ± 5.3 | 2.3 | 101.0 ± 6.3 | 3.5 | 57.0 ± 4.2 | 1.6 |
| Σ OS | 765.6 ± 42.5 | 23.8 | 826.3 ± 33.1 | 19.6 | 722.6 ± 69.8 | 24.8 | 957.1 ± 182.1 | 26.7 |
| Na+ | 23.3 ± 1.6 | 0.7 | 744.0 ± 233.8 | 17.6 | 19.3 ± 1.7 | 0.7 | 1,014.3 ± 63.5 | 28.3 |
| K+ | 1,398.2 ± 142.5 | 43.4 | 1,063.8 ± 111.0 | 25.2 | 1,383.9 ± 169.4 | 47.6 | 516.5 ± 62.3 | 14.4 |
| NO3− | 138.5 ± 14.6 | 4.3 | 77.5 ± 9.2 | 1.8 | 419.8 ± 27.4 | 14.4 | 217.7 ± 12.1 | 6.1 |
| Cl− | 896.5 ± 60.1 | 27.8 | 1,512.7 ± 130.2 | 35.8 | 364.5 ± 40.8 | 12.5 | 877.6 ± 80.1 | 24.5 |
| Σ inorganic solutes | 2,456.6 ± 210.0 | 76.2 | 3,398.0 ± 250.8 | 80.4 | 2,187.4 ± 227.1 | 75.2 | 2,626.1 ± 181.8 | 73.3 |