PH	plant height
LSA	leaf surface area
AGFW	above-ground fresh weight
AGDW	above-ground dry weight
UGFW	under-ground fresh weight
UGDW	under-ground dry weight
RSR	root–shoot ratio
RWC	relative water content
Rv	root vigor
SS	soluble sugar
Pn	assimilation rate
Tr	transpiration rate
Sc	stomatal conductance
Ci	internal CO2
WUE	water use efficiency
DEGs	differentially expressed genes
DEMs	differentially expressed metabolites
GO	Gene Ontology
KEGG	Kyoto Encyclopedia of Genes and Genomes
BP	biological processes
CC	cellular components
MF	molecular functions
PCA	principal component analysis
OPLS-DA	orthogonal partial least squares discriminant analysis