Biplot of 44 genotypes of A. cylindrica (1–44) and physiological traits (vectors) affected by 400 mM NaCl for 4 weeks. The PC1 and PC2 explain 53.4 and 31.5% of the total variations, respectively. Traits abbreviations: STi: salt tolerance index, rNa: root Na+, rK: root K+, rK/Na: root K+/Na+, sNa: shoot Na+, sK: shoot K+, sK/Na: shoot K+/Na+, rDW: root dry matter, sDW: shoot dry matter; MDA: shoot malondialdehyde, H2O2: shoot hydrogen peroxide and Car: shoot carbohydrate