Table I.
Composition of the low-ionic-strength nutrient solutions used for plant cultivation and the simple salt solutions used for incubating excised root apices
| Ion | Nutrient Solutions
|
Solutions for Incubating Root Apices
|
||||
|---|---|---|---|---|---|---|
| No Al | Low Al | High Al | No Al | Low Al | High Al | |
| μm | ||||||
| {Al3+} | – | 43 | 115 | – | 43 | 115 |
| {AlOH2+} | – | 7 | 18 | – | 7 | 18 |
{Al(OH) } |
– | 0.9 | 2.3 | – | 0.9 | 2.3 |
{AlSO } |
– | 10 | 22 | – | – | – |
{AlHPO } |
– | 0.5 | 0.7 | – | – | – |
{NH } |
10 | 10 | 10 | – | – | – |
| {Ca2+} | 53 | 51 | 49 | 178 | 173 | 166 |
| {Mg2+} | 26 | 26 | 25 | – | – | – |
| {K+} | 58 | 58 | 57 | – | – | – |
| {Na+} | 155 | 154 | 153 | – | – | – |
{NO } |
97 | 96 | 95 | – | – | – |
{H2PO } |
1.0 | 0.4 | 0.2 | – | – | – |
{SO } |
87 | 76 | 62 | – | – | – |
| {Cl−} | 169 | 389 | 784 | 389 | 583 | 954 |
Activities of major ions and ion complexes were predicted with GEOCHEM 2.0. The pH of all solutions was adjusted to 4.2 by adding calculated amounts of HCl.