Table 1.

Eight seedling root traits analyzed in this study

Root trait	Abbreviation	Measurement description
Primary root length	PRL	Measured using a ruler
Total number of the primary, seminal, and crown roots	PSC	Counted manually
Lateral root number	LRN	Calculated by subtracting PSC from RTN
Total root tip number	RTN	Measured electronically
Total root length	TRL	Measured electronically
Total root surface area	RSA	Measured electronically
Total root volume	TRV	Measured electronically
Average root diameter	ARD	Measured electronically