The response of Solanum lycospersicum (L.) to varied concentrations of salinity stress was investigated. Plant growth, biochemical parameters, cytotoxic ion sequestration and ionic balance were determined. The plant exhibited a decline in number of leaves, length of leaf and dry matter accumulation measured. The number of flowers increased at 50 mM NaCl concentration. Free proline content increases with increasing NaCl concentration and differ significantly (P < 0.05) while Glycine Betaine (GB) content did not differ significantly (P > 0.05). Salinity stress increased cytotoxic ions (Na+ and Cl- ) and Ca2+ with a corresponding decrease in K+ concentrations. The ionic balance (Na+ /K+ ) was low due to high content of K+ levels the plant accumulated ranging from 77.00 to 65.00 mg Kg-1. It can be concluded that the osmolyte (Pro and GB) accumulations, low Na+ /K+ ratio and high number of flowers are a possible indicator of salt tolerance in the S. lycospersicum genotype studied.
