Table 1.
Correlation analysis between root morphology and P starvation tolerance. Asterisks note statistically significant differences between control and treatment groups (P < 0.05), double asterisks note statistically significant differences between control and treatment groups (P < 0.01). Bars represent the standard error of the mean (n = 3)
| 2015/2016 | Relative length of root | Relative surface area of root | Relative average diam of root | Relative volume of root | Relative number of root tips | Relative dry weight of root | Relative dry weight of shoot | Relative P content of shoot |
|---|---|---|---|---|---|---|---|---|
| Relative length of root | 1 | 0.893**/0.948** | 0.101/0.137 | 0.719**/0.812** | 0.918**/0.840** | 0.969**/0.422** | 0.539**/0.475** | 0.572**/0.507** |
| Relative surface area of root | 0.893**/0.948** | 1 | 0.486**/0.435** | 0.953**/0.954** | 0.695**/0.694** | 0.977**/0.529** | 0.591**/0.552** | 0.521**/0.578** |
| Relative average diam of root | 0.101/0.137 | 0.486**/0.435** | 1 | 0.678**/0.665** | −0.129/−0.208 | 0.315/0.444* | 0.429*/0.360 | 0.138/0.342 |
| Relative volume of root | 0.719**/0.812** | 0.953**/0.954** | 0.678**/0.665** | 1 | 0.468**/0.488** | 0.868**/0.587** | 0.543**/0.567** | 0.426**/0.596** |
| Relative number of root tips | 0.918**/0.840** | 0.695**/0.694** | −0.129/−0.208 | 0.468**/0.488** | 1 | 0.821**/0.405* | 0.485**/0.495** | 0.542**/0.524** |
| Relative dry weight of root | 0.969**/0.422** | 0.977**/0.529** | 0.315/0.444* | 0.868**/0.587** | 0.821**/0.405* | 1 | 0.582**/0.647** | 0.560**/0.687** |
| Relative dry weight of shoot | 0.539**/0.475** | 0.591**/0.552** | 0.429*/0.360 | 0.543**/0.567** | 0.485**/0.495** | 0.582**/0.647** | 1 | 0.797**/0.876** |
| Relative P content of shoot | 0.572**/0.507** | 0.521**/0.578** | 0.138/0.342 | 0.426**/0.596** | 0.542**/0.524** | 0.560**/0.687** | 0.797**/0.876** | 1 |
* menas P < 0.05; ** means P < 0.01