Figure 6. Characterization of the concentration and distribution of sodium and potassium in NaCl-treated S. europaea at different time points.

(A) The total sodium and potassium contents in S. europaea shoot and root after different time intervals of NaCl treatment. (B) SEM X-ray microanalysis of sodium and potassium element distribution in S. europaea shoots and roots at the tissue level. The relative sodium and potassium contents were measured from different parts of the transversal sections. (a) Xylem in the shoot stele; (b) parenchyma in the shoot stele; (c) parenchyma in the shoot endodermis; (d) root medulla; (e) xylem in root stele; and (f) root exodermis.