Fig. 2.

Score plots of the principal component analysis displaying the metabolomic trajectory of the root (A ₁) and shoot (A ₂) of maize seedlings under no salinity stress (CK), neutral salt stress (SS), and alkaline salt stress (AS). Scores obtained by orthogonal partial least-squares discriminant analysis (PLS-DA) exhibiting the dependence of the effects of neutral salt stress on maize on salinity levels: CK vs. SS in roots (B ₁) and shoots (B ₂); CK vs. AS in (C ₁) roots and shoots (C ₂)