Table 3.
Percentage of the total sum of squares for the effects of variety (V), salinity (S), and their interaction (V × S) for the ions, osmolytes, and carbohydrates contents in the leaves of plants of four Phaseolus varieties grown at four salinity levels (0, 50, 100, and 150 mM NaCl added to the medium solution). For the S and V × S sources of variation, the sum of squares has been decomposed in the linear, quadratic and cubic components.
| Source of Variation | Degrees of Freedom | Na | Cl | K | Proline | Glycine Betaine | Total Soluble Sugars | Fructose | Sucrose | Myo-Inositol |
|---|---|---|---|---|---|---|---|---|---|---|
| Variety (V) | 3 | 46.51 **** | 17.03 **** | 14.12 ** | 9.70 **** | 75.18 **** | 30.49 **** | 55.59 **** | 60.75 **** | 5.11 ** |
| Salinity (S) | 3 | 18.89 **** | 69.32 **** | 6.75 ns | 66.45 **** | 5.00 **** | 6.57 * | 5.71 **** | 5.01 **** | 32.47 **** |
| Linear | 1 | 17.99 **** | 62.19 **** | – | 53.09 **** | 0.89 * | 0.02 ns | 4.49 **** | 3.10 **** | 28.74 **** |
| Quadratic | 1 | 0.58 * | 6.83 **** | – | 12.95 **** | 2.52 **** | 6.54 *** | 0.75 ns | 0.70 * | 2.41 ** |
| Cubic | 1 | 0.32 ns | 0.30 ns | – | 0.41 * | 1.59 *** | 0.00 ns | 0.47 ns | 1.21 ** | 1.32 * |
| V × S | 9 | 28.88 **** | 7.48 **** | 12.53 ns | 20.03 **** | 11.50 **** | 27.98 **** | 24.88 **** | 27.54 **** | 41.24 **** |
| Linear | 3 | 24.17 **** | 4.51 **** | – | 15.88 **** | 0.77 ns | 23.16 **** | 16.93 **** | 18.60 **** | 29.53 **** |
| Quadratic | 3 | 0.64 ns | 2.92 **** | – | 4.06 **** | 6.47 **** | 3.56 ns | 7.44 **** | 3.02 **** | 1.29 ns |
| Cubic | 3 | 4.07 **** | 0.05 ns | – | 0.09 ns | 4.26 **** | 1.26 ns | 0.51 ns | 5.91 **** | 10.42 **** |
| Residual | 64 | 5.72 | 6.16 | 66.60 | 3.82 | 8.32 | 34.96 | 13.81 | 6.70 | 21.18 |
ns, *, **, ***, **** indicate nonsignificant or significant at p < 0.05, p < 0.01, p < 0.001, or p < 0.0001, respectively.