Table 1.
Maize seedling trait measurements and descriptions.
| Trait Name | Abbreviations | Trait Measurements and Descriptions |
|---|---|---|
| SPAD value of the 2nd leaf | SPAD | Measured with a chlorophyll meter |
| Plant height (cm) | PH | Measured with a ruler |
| Shoot dry weight (g) | SDW | Dried and weighed on a balance (0.001 g) |
| Root dry weight (g) | RDW | Dried and weighed on a balance (0.001 g) |
| Root-to-shoot ratio | RSR | Root dry weight/shoot dry weight |
| Total root length (cm) | TRL | Length of the whole root system |
| Total root surface area (cm2) | TRSA | Surface area of the whole root system |
| Total root volume (cm3) | TRV | Volume of the whole root system |
| Crown root number | CRN | Count of the axial first whorl crown roots |
| Crown root length (cm) | CRL | Measured with a ruler |
| Crown root surface area (cm2) | CRSA | Measured with root scanner |
| Crown root volume (cm3) | CRV | Measured with root scanner |
| Seminal root number | SRN | Count of the axial seminal roots |
| Seminal root length (cm) | SRL | Measured with a ruler |
| Seminal root surface area (cm2) | SRSA | Measured with root scanner |
| Seminal root volume (cm3) | SRV | Measured with root scanner |
| Primary root length (cm) | PRL | Measured with a ruler |
| Primary root surface area (cm2) | PRSA | Surface area of the whole primary root |
| Primary root volume (cm3) | PRV | Volume of the whole primary root |
| Total lateral root length | TLRL | The total length of all of the lateral roots of the entire root system |