| Sl | Primer | Sequence |
| 1. | OsNHX1_F | CACCATGGGGATGGAGGTGGCG |
| 2. | OsNHX1_R | TCATCTTCCTCCATGGCTCTGC |
| 3. | AtNHX1_F | CACCATGTTGGATTCTCTAGTGTC |
| 4. | AtNHX1_R | TCAAAGCTTTTCTTCCACG |
| 5. | AtNHX2_F | CACCGAAAGATGACAATGTTCGCCTC |
| 6. | AtNHX2_R | TCAAGGTTTACTAAGATCATGGCTG |