Table 2.
Effect of aspartic acid (Asp) on compatible solute accumulation (amino acids; AA, proline; Pro, total soluble sugar; TSS, and total carbohydrates; TC) in wheat plants grown under salt stress (NaCl) for 60 days.
| Treatment | AA | Pro | TSS | TC | |
|---|---|---|---|---|---|
| (µg g-1 DW) | (mg g-1 DW) | (g kg-1 DW) | |||
| NaCl (mM) | |||||
| 0 | 245† c | 38.0 c | 41.9 c | 447 a | |
| 30 | 258 b | 41.2 b | 44.2 b | 426 b | |
| 60 | 280 a | 43.4 a | 47.9 a | 419 c | |
| Asp (mM) | |||||
| 0.0 | 235 d | 36.5 c | 40.3 d | 419 d | |
| 0.4 | 256 c | 40.0 b | 44.1 c | 428 c | |
| 0.6 | 270 b | 42.4 ab | 45.9 b | 434 b | |
| 0.8 | 283 a | 44.6 a | 48.4 a | 442 a | |
| NaCl (mM) | Asp (mM) | ||||
| 0 | 0.0 | 215 g | 33.4 e | 36.8 i | 436 cd |
| 0 | 0.4 | 243 f | 37.6 cde | 41.5 g | 444 bc |
| 0 | 0.6 | 254 e | 39.4 b-e | 43.5 f | 452 ab |
| 0 | 0.8 | 268 d | 41.6 a-d | 45.9 d | 458 a |
| 30 | 0.0 | 236 f | 36.6 de | 40.4 h | 417 f |
| 30 | 0.4 | 252 e | 39.9 bcd | 44.0 ef | 425 ef |
| 30 | 0.6 | 268 d | 43.0 abc | 44.8 e | 425 ef |
| 30 | 0.8 | 277 c | 45.3 ab | 47.4 c | 437 cd |
| 60 | 0.0 | 254 e | 39.4 b-e | 43.5 f | 404 g |
| 60 | 0.4 | 274 cd | 42.4 a-d | 46.8 cd | 416 f |
| 60 | 0.6 | 288 b | 44.7 ab | 49.3 b | 423 ef |
| 60 | 0.8 | 303 a | 47.0 a | 51.9 a | 431 de |
†Mean values within the same column for each trait with the same lower-case letter are not significantly different according to Tukey’s honestly significant difference (HSD) test at p ≤ 0.05. The results presented are from wheat plants harvested 75 days after sowing (DAS).