Table II. Salt stress weakens the correlation between MRL and LRL.
Pearson correlation coefficients calculated between MRL and other RSA parameters of 4-d-old seedlings transferred for 7 d to different salt concentrations. Pearson correlation coefficients were correlated on average values of eight replicates for all four accessions used with SPSS software. The significant correlations are marked with an asterisk for significance levels of 0.05 and double asterisks for 0.01. RSA trait descriptions are provided in Table I. n.a., Not applicable.
|
RSA Trait |
Concentrations of NaCl |
||||||
|---|---|---|---|---|---|---|---|
| 0 |
25 | 50 | 75 | 100 | 125 | 150 | |
| mm | |||||||
| MRVL | 0.977** | 0.993** | 0.992** | 0.991** | 0.985** | 0.962** | 0.956** |
| MRVA | 0.427* | −0.287 | 0.113 | 0.223 | 0.002 | −0.313 | −0.326 |
| #LR | 0.751** | 0.870** | 0.870** | 0.376* | 0.400* | 0.419* | n.a. |
| #LR region A | 0.333 | 0.332 | 0.367* | 0.054 | 0.267 | 0.146 | 0.432* |
| #LR region B | 0.418* | 0.803** | 0.570** | 0.209 | 0.372* | 0.435* | 0.410* |
| Basal | −0.559** | −0.092 | −0.304 | 0.244 | 0.247 | 0.129 | 0.14 |
| Branched | 0.716** | 0.821** | 0.865** | 0.656** | 0.469** | 0.691** | n.a. |
| Apical | 0.389* | 0.587** | 0.725** | 0.782** | 0.765** | 0.405* | n.a. |
| Basal/MRL | −0.595** | −0.461* | −0.621** | −0.400* | −0.237 | −0.272 | −0.078 |
| Branched/MRL | 0.175 | 0.328 | 0.369* | −0.409* | −0.239 | 0.374* | n.a. |
| Apical/MRL | 0.028 | −0.146 | 0.15 | 0.476** | 0.369* | −0.245 | 0.333 |
| Straightness | 0.06 | 0.624** | 0.403* | 0.354 | 0.113 | −0.165 | −0.32 |
| TRS | 0.920** | 0.910** | 0.906** | 0.891** | 0.893** | 0.921** | 0.821** |
| LRD/MR | −0.035 | −0.05 | 0.15 | −0.753** | −0.348 | −0.291 | 0.142 |
| LRD region A | 0.333 | 0.332 | 0.367* | 0.054 | 0.267 | 0.146 | 0.432* |
| LRD region B | −0.534** | 0.153 | −0.294 | −0.613** | −0.352* | −0.371* | 0.301 |
| LRD/BZ | −0.134 | −0.520** | −0.017 | −0.512** | 0.176 | −0.237 | 0.161 |
| Depth | 0.888** | 0.984** | 0.985** | 0.988** | 0.979** | 0.910** | 0.915** |
| LRL | 0.847** | 0.793** | 0.741** | 0.221 | 0.354* | 0.238 | 0.083 |
| LRL region A | 0.526** | 0.619** | 0.416* | −0.052 | 0.260 | 0.109 | 0.095 |
| LRL region B | 0.592** | 0.678** | 0.516** | 0.168 | 0.377* | 0.210 | 0.283 |
| aLRL | 0.418* | 0.139 | 0.350* | −0.156 | −0.245 | −0.137 | −0.017 |
| aLRL region A | 0.271 | 0.577** | 0.432* | −0.186 | −0.155 | −0.077 | 0.031 |
| aLRL region B | 0.324 | 0.628** | 0.381* | −0.169 | 0.546** | −0.054 | 0.283 |
| MRL/TRS | −0.491* | −0.177 | −0.355* | 0.605** | 0.321 | 0.171 | 0.048 |
| aLRL/TRS | −0.642** | −0.786** | −0.618** | −0.828** | −0.532** | −0.477** | −0.166 |
| aLRL/MRL | −0.504** | −0.770** | −0.529** | −0.816** | −0.546** | −0.505** | −0.24 |