. 2016 May 20;172(2):690–706. doi: 10.1104/pp.16.00712

Table I. Overview of RSA traits measured for control and Pi starvation conditions.

Average values and se of the traits are shown for Arabidopsis accession Col-0. Values presented are averages for 16 replicates. Statistical analysis was performed with Student’s t test. Significant differences are denoted with asterisks (***, P < 0.001; **, P < 0.01; and *, P < 0.05).

Category	RSA Trait	Description	Unit	Control (8 d)		Pi Starved (10 d)
				Average	se	Average	se
MR	MRPL	Main root path length	cm	3.455	0.102	4.355***	0.122
	MRVL	Main root vector length	cm	3.146	0.088	3.947***	0.106
	Straightness	MRPL/MRVL	Ratio	0.911	0.003	0.907	0.003
	Depth	Depth	cm	3.134	0.089	3.937***	0.104
Zonation	Basal	Basal zone length	cm	0.421	0.040	0.231**	0.034
	Branched	Branched zone length	cm	0.612	0.111	2.191***	0.092
	Apical	Apical zone length	cm	2.422	0.115	1.933**	0.082
	Branched/MR	Branched zone length per main root path length	Ratio	0.173	0.028	0.503***	0.015
	Apical/MR	Apical zone length per main root path length	Ratio	0.703	0.029	0.443***	0.013
LR	#LR	Number of lateral roots	No.	2.643	0.372	10.529***	0.763
	LRD	Lateral root density per main root cm	No. cm⁻¹	0.748	0.086	2.401***	0.146
	LRD/BZ	Lateral root density per branched zone cm	No. cm⁻¹	3.730	0.517	4.760	0.223
	aLRL	Average lateral root length	cm	0.135	0.030	0.207*	0.015
	LRL	Lateral root length	cm	0.343	0.070	2.256***	0.266
	LRL/MRL	Lateral root length per main root length	Ratio	0.094	0.017	0.504***	0.047
	aLRL/MRL	Average lateral root length per main root length	Ratio	0.038	0.008	0.047	0.003
	TRS	Total root size	cm	3.798	0.165	6.611***	0.376