Table 1 Mineral nutrient concentrations in mg g−1 DW in source leaves at 49 days after onset of the treatment (three days before root harvest) and in roots at harvest (55 days after onset of the treatment) (n = 4) (Experiment 1). ‘Mg low’ = 5 µM Mg; ‘Mg med’ = 100 µM Mg; ‘Mg high’ = 500 µM Mg. K = potassium, Ca = calcium, P = phosphorus, S = sulphur, B = boron, Fe = iron, Mn = manganese, Na = sodium, Zn = zinc. Mean ± SE values. Capitals = significant differences between ‘Mg low’, ‘Mg med’, and ‘Mg high’ plants. No indication = not significant. P < 0.05.
Mg low | Mg med | Mg high | ||||
|---|---|---|---|---|---|---|
Leaves | ||||||
K | 66.88 ± 2.63 | B | 60.71 ± 5.38 | AB | 56.65 ± 4.44 | A |
Ca | 12.32 ± 3.16 | 12.31 ± 1.03 | 14.04 ± 3.43 | |||
P | 6.12 ± 1.34 | 6.75 ± 1.63 | 4.79 ± 1.38 | |||
S | 3.13 ± 0.40 | A | 4.10 ± 0.52 | B | 3.52 ± 0.84 | AB |
B | 0.05 ± 0.01 | 0.05 ± 0.01 | 0.05 ± 0.01 | |||
Fe | 0.10 ± 0.01 | A | 0.16 ± 0.03 | B | 0.11 ± 0.02 | AB |
Mn | 0.06 ± 0.01 | B | 0.04 ± 0.01 | A | 0.05 ± 0.01 | AB |
Na | 0.19 ± 0.04 | B | 0.09 ± 0.02 | A | 0.06 ± 0.02 | A |
Zn | 0.06 ± 0.02 | 0.05 ± 0.02 | 0.03 ± 0.01 | |||
Roots | ||||||
|---|---|---|---|---|---|---|
K | 2.32 ± 1.27 | 1.71 ± 0.22 | 3.86 ± 2.58 | |||
Ca | 13.83 ± 2.27 | AB | 13.91 ± 1.18 | B | 11.33 ± 0.46 | A |
P | 4.46 ± 0.94 | 3.86 ± 0.32 | 3.47 ± 1.09 | |||
S | 2.87 ± 0.52 | 3.11 ± 0.16 | 3.29 ± 0.32 | |||
B | 0.02 ± 0.01 | 0.02 ± 0.01 | 0.02 ± 0.01 | |||
Fe | 4.58 ± 0.41 | B | 2.36 ± 0.61 | A | 1.98 ± 0.86 | A |
Mn | 0.33 ± 0.07 | B | 0.17 ± 0.02 | A | 0.14 ± 0.05 | A |
Na | 0.35 ± 0.02 | 0.36 ± 0.03 | 0.37 ± 0.03 | |||
Zn | 0.18 ± 0.07 | B | 0.04 ± 0.01 | A | 0.04 ± 0.01 | A |
