Figure 2.

Fragments of transverse sections of root tips showing the zone of cap initials forming apex columella from WT (a–c) and transgenic tomato (d–f) plants grown without (a,d), and supplemented with the NaCl (b,e) and Na₂SO₄ (c,f). Modification of the cell walls of root apical meristem and cap cells of the tomato root tip is shown. The thickness and location of adjacent layers related to the cap initials, the transformation of the size and shape are visible as the most sensitive targets for salts treatments. Symbols: mz–meristem zone; cz–columella zone.