Various concentrations of salt(NaCl) were shown to have an influence on the differentiation of tissues in the root and stem of Bacopa monniera (L.) Wettst. Higher concentrations induced drastic changes in roots grown on salt-supplemented media; epidermal and cortical cells expreienced changes in shape, size, and orientation and/or were got disintegrated. A low concentration of salt induced a profuse development of root haris which gradually disappeared at higher concentrations. Air spaces in the stem cortex were enlarged and xylem cell walls in the vascular ring were thickened.