Table 2.
Effects of selenate treatment on the content of selected amino acids in leaves and roots of radish plants cultivated in soil.
| Amino acid (% w/w) | Leaves | |||
|---|---|---|---|---|
| Se treatment (mg per plant) | ||||
| 0 | 5 | 10 | 20 | |
| Phenylalanine | 3.84 ± 1.56b | 5.45 ± 0.93b | 17.04 ± 5.91a | 14.36 ± 3.08a |
| Isoleucine | 0.83 ± 0.01c | 0.78 ± 0.10c | 1.32 ± 0.22b | 2.38 ± 0.62a |
| Leucine | 0.28 ± 0.01b | 0.20 ± 0.14b | 0.76 ± 0.36a | 0.75 ± 0.26a |
| Histidine | 9.06 ± 0.81b | 11.98 ± 2.36ab | 8.26 ± 0.78b | 11.18 ± 0.76a |
| Tyrosine | 0.14 ± 0.03b | 0.08 ± 0.01b | 0.37 ± 0.17a | 0.33 ± 0.15a |
| Tryptophan | 0.39 ± 0.06c | 0.27 ± 0.10c | 0.83 ± 0.31b | 1.40 ± 0.43a |
| Asparagine | 3.67 ± 1.08a | 4.63 ± 1.25a | 4.34 ± 1.19a | 3.29 ± 0.24a |
| Glutamine | 33.43 ± 17.33b | 26.15 ± 5.85b | 80.74 ± 24.57a | 102.30 ± 24.73a |
| Valine | 9.55 ± 1.34a | 7.54 ± 0.73a | 10.01 ± 2.71a | 8.47 ± 2.11a |
| Proline | 40.85 ± 7.36a | 27.86 ± 1.91b | 22.57 ± 8.21b | 16.50 ± 5.27b |
| Lysine | 1.21 ± 0.36a | 1.22 ± 0.11a | 1.07 ± 0.28a | 0.96 ± 0.16a |
| Se-methylselenocysteine | − | 5.83 ± 1.11b | 7.23 ± 1.98b | 9.30 ± 1.94a |
| Se-cysteine | − | − | − | − |
| Se-methionine | − | − | − | − |
| Total | 2.03 ± 0.15b | 2.05 ± 0.13b | 2.47 ± 0.23a | 2.49 ± 0.27a |
| Amino acid (% w/w) | Roots | |||
| Se treatment (mg per plant) | ||||
| 0 | 5 | 10 | 20 | |
| Phenylalanine | 9.73 ± 3.32b | 9.10 ± 1.02b | 10.76 ± 2.01ab | 14.93 ± 2.56a |
| Isoleucine | 17.21 ± 2.78b | 12.83 ± 2.62b | 13.88 ± 3.09b | 23.45 ± 3.19a |
| Leucine | 3.67 ± 0.94b | 3.51 ± 0.08b | 3.73 ± 0.45b | 6.19 ± 0.02b |
| Histidine | 7.13 ± 0.79a | 8.75 ± 0.75a | 7.75 ± 1.32a | 6.72 ± 1.36a |
| Tyrosine | 1.49 ± 0.34b | 1.23 ± 0.25b | 1.40 ± 0.20b | 2.17 ± 0.43a |
| Tryptophan | 1.66 ± 0.40ab | 1.82 ± 0.11ab | 1.43 ± 0.23b | 2.57 ± 0.54a |
| Asparagine | 4.26 ± 0.39a | 3.61 ± 0.89a | 4.19 ± 1.10a | 4.52 ± 1.33a |
| Glutamine | 97.09 ± 3.69b | 75.07 ± 1.12c | 78.70 ± 7.02c | 121.45 ± 2.98a |
| Valine | 50.06 ± 3.36 | 48.10 ± 10.82 | 41.42 ± 11.70 | 47.71 ± 16.98 |
| Proline | 98.74 ± 24.96ab | 101.32 ± 13.33a | 65.95 ± 22.31b | 73.83 ± 13.98b |
| Lysine | 0.72 ± 0.13a | 0.58 ± 0.15a | 0.68 ± 0.25a | 0.69 ± 0.11a |
| Methionine | 2.08 ± 0.14a | 1.49 ± 0.11b | 1.66 ± 0.10b | 1.77 ± 0.29ab |
| Se-methylselenocisteine | − | 1.73 ± 1.09b | 1.62 ± 0.11b | 3.34 ± 1.05a |
| Se-cysteine | − | − | − | − |
| Se-methionine | − | − | − | − |
| Total | 3.62 ± 0.16a | 3.56 ± 0.20a | 3.13 ± 0.33a | 3.80 ± 0.27a |
Data are expressed as mg amino acid per 100 mg tissue fresh weight (FW). Different letters along rows indicate significant differences (n = 4, ±STD, p < 0.05) among treatments.