Table 2.
Main effects of salinity (S) and brassinolide (BL) on calcium (Ca), potassium (K), magnesium (Mg), sodium (Na) and K+/Na+ in leaves, stems and roots of soybean at harvest.
| Sources of Variance | Calcium (mg/g) | Potassium (mg/g) | Magnesium (mg/g) | Sodium (mg/g) | K+/Na+ | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Salinity (S) Concentrations (mM/L) |
Leaves | Stems | Roots | Leaves | Stems | Roots | Leaves | Stems | Roots | Leaves | Stems | Roots | Leaves | Stems | Roots |
| S0 | 3.00 a | 0.75 a | 0.58 a | 22.50 a | 14.88 a | 15.59 a | 1.16 a | 0.78 a | 0.65 a | 0.73 a | 0.99 c | 4.71 b | 66.76 a | 21.95 a | 5.86 a |
| S1 | 2.36 b | 0.54 b | 0.39 b | 20.39 a | 12.59 a | 10.20 b | 1.00 b | 0.70 ab | 0.30 b | 2.62 b | 10.70 b | 14.09 a | 12.30 b | 2.14 b | 0.71 b |
| S2 | 2.09 c | 0.51 bc | 0.32 b | 17.59 b | 11.22 bc | 5.55 c | 0.90 c | 0.61 bc | 0.13 c | 5.52 a | 15.47 a | 14.64 a | 7.20 b | 0.73 b | 0.38 b |
| S3 | 1.39 d | 0.47 c | 0.30 b | 12.39 c | 10.06 c | 3.81 c | 0.81 d | 0.53 c | 0.09 c | 6.29 a | 16.28 a | 14.90 a | 3.37 b | 0.62 b | 0.25 b |
| Growth stages of BL applications | |||||||||||||||
| BL0 | 1.27 d | 0.50 b | 0.26 a | 11.34 b | 7.29 c | 3.50 c | 0.84 b | 0.53 b | 0.11 c | 5.69 a | 11.65 a | 13.58 a | 8.25 b | 2.69 a | 0.31 b |
| BL1 | 2.17 c | 0.55 ab | 0.38 a | 17.63 a | 11.54 b | 8.05 b | 0.98 a | 0.66 ab | 0.31 b | 2.88 b | 11.13 a | 12.15 b | 20.56 ab | 8.22 a | 1.09 b |
| BL2 | 2.28 bc | 0.58 ab | 0.38 a | 19.29 a | 12.47 ab | 9.26 ab | 0.98 a | 0.69 a | 0.28 b | 3.93 ab | 10.97 a | 11.94 b | 22.68 ab | 4.83 a | 1.27 b |
| BL3 | 2.26 bc | 0.57 ab | 0.40 a | 19.25 a | 13.21 ab | 9.24 ab | 0.98 a | 0.69 a | 0.29 b | 4.19 ab | 11.80 a | 11.88 b | 24.58 ab | 7.23 a | 1.84 b |
| BL4 | 2.53 ab | 0.57 ab | 0.43 a | 20.75 a | 14.06 ab | 10.44 ab | 1.00 a | 0.72 a | 0.36 ab | 3.18 b | 10.54 a | 11.64 b | 28.55 a | 5.83 a | 1.78 b |
| BL5 | 2.73 a | 0.63 a | 0.53 a | 21.05 a | 14.56 a | 12.22 a | 1.03 a | 0.65 ab | 0.42 a | 2.86 b | 9.07 b | 11.30 b | 29.81 a | 9.37 a | 4.55 a |
Mean pairs within a column with different letters are significantly different at the 5% probability level according to Duncan’s new multiple-range test. BL0—no brassinolide application (control); BL1—brassinolide application at seedling growth stage of soybean; BL2—brassinolide application at flowering growth stage of soybean; BL3—brassinolide application at podding growth stage of soybean; BL4—brassinolide application at seedling + flowering growth stages of soybean; BL5—brassinolide application at seedling + flowering + podding growth stages of soybean; S0—1.10 mM/L (control); S1—32.40 mM/L; S2—60.60 mM/L; S3—86.30 mM/L.