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The combinations of different nitrate and ammonium ion concentrations that were added to the Y3 medium, and with and without an amino acid mixture and applied to plumule tissues.
| Treatment | Amino Acid Mixture | Concentration of KNO3 (Mm) | Concentration of NH4Cl (Mm) | Ratio of NO3−/NH4+ |
|---|---|---|---|---|
| Control | No | 20 | 10 | 2:1 |
| T1 | Yes | |||
| T2 | No | 40 | 4:1 | |
| T3 | Yes | |||
| T4 | No | 20 | 2:1 | |
| T5 | Yes |
