Table 1.
Effect of β-aminobutyric acid (BABA) on Na content, K content, and the ratio of Na and K in both shoot and root of rapeseed (Brassica napus L.) seedlings exposed to different concentrations of salt stress. Average from three replications (n = 3) was used to determine mean (± SD) for each treatment and means of the same column were compared by letters, where letters with different values varied significantly at p ≤ 0.05 due to Fisher’s least standard difference (LSD) test.
| Treatment | Shoot Na (µ mol g−1 DW) |
Root Na (µ mol g−1 DW) |
Shoot K (µ mol g−1 DW) |
Root K (µ mol g−1 DW) |
Shoot Na/K Ratio | Root Na/K Ratio |
|---|---|---|---|---|---|---|
| Control | 11 ± 1.5 d | 97 ± 13 d | 118 ± 4.3 a | 302 ± 10 a | 0.10 ± 0.01 d | 0.32 ± 0.05 d |
| BABA | 11 ± 1.4 d | 95 ± 12 d | 115 ± 3.9 ab | 301 ± 7 a | 0.09 ± 0.01 d | 0.31 ± 0.05 d |
| S1 | 990 ± 23 bc | 1950 ± 94 b | 96 ± 2.1 c | 256 ± 4 c | 10.29 ± 0.46 b | 7.34 ± 0.30 bc |
| BABA+S1 | 977 ± 24 c | 1727 ± 29 c | 111 ± 3.1 b | 294 ± 11 ab | 8.79 ± 0.42 c | 6.00 ± 0.34 c |
| S2 | 1062 ± 57 a | 2272 ± 195 a | 86 ± 1.1 d | 185 ± 10 d | 12.37 ± 0.71 a | 12.29 ± 1.36 a |
| BABA+S2 | 1050 ± 53 ab | 1941 ± 179 b | 110 ± 3.3 b | 252 ± 40 c | 9.57 ± 0.71 bc | 7.87 ± 1.70 b |
Here, BABA, S1 and S2 indicate 150 μM β-aminobutyric acid, 100 mM NaCl and 150 mM NaCl, respectively.