Table I. Overview of RSA parameters obtained from EZ-Rhizo and their response to salinity stress.

The effect of salt stress on individual RSA parameters was studied by comparing RSA observed at different salt stress conditions with control conditions. The effect of salt stress was defined as significant when the RSA trait value in salt stress conditions was significantly different from control conditions with Scheffe’s post hoc test with significance of 0.01 (double asterisks) for at least two different accessions at three salt stress concentrations used. ns, Not significant.

Trait Identifier	Trait Description	Unit	Salt Effect
MRL	MR length	cm	**
MRVL	MR vector length	cm	**
MRVA	MR vector angle	degree	ns
noLR	No. of LRs per MR	no.	**
#LR region A	No. of LRs in region above transfer point	no.	ns
#LR region B	No. of LRs in region below transfer point	no.	**
Basal	Length of basal zone	cm	ns
Branched	Length of branched zone	cm	**
Apical	Length of apical zone	cm	ns
Basal/MRL	Length of basal zone as ratio of MRL	%	ns
Branched/MRL	Length of branched zone as ratio of MRL	%	ns
Apical/MRL	Length of apical zone as ratio of MRL	%	ns
Straightness	MRL divided by MR vector length	%	ns
TRS	Cumulative length of LR and MR	cm	**
LRD/MRL	No. of LRs per cm of MR	no./cm	ns
LRD region A	No. of LRs per cm of region above the transfer point	no./cm	ns
LRD region B	No. of LRs per cm of region below the transfer point	no./cm	ns
LRD / BZ	No. of LRs per cm of branched zone	no./cm	ns
Depth	Depth	cm	**
LRL	Cumulative length of LRs	cm	**
LRL region A	Cumulative length of LRs in region above the transfer point	cm	**
LRL region B	Cumulative length of LRs in region below the transfer point	cm	**
aLRL	Average length of LR	cm	**
aLRL region A	Average length of LRs in region above the transfer point	cm	**
aLRL region B	Average length of LRs in region below the transfer point	cm	**
MRL/TRS	MR length as a ratio of TRS	%	**
aLRL/TRS	Average LR length as a ratio of TRS	%	ns
aLRL/MRL	Average LR length as a ratio of MR length	%	ns