The response of wheat seedlings germinated under salinity
stress to exogenous abscisic acid was discussed. Exogenous
ABA acid induces two characteristic proteins of high molecu-
lar weights ( 109.4 and 84.0 kDa) in addition to the new protein set formed under high salinity levels. ABA, also induces synthesized forms of guaiacot peroxidase in seedlings treated with 200 mM NaCI. The induction and/or accumulation of peroxi-
dase isoforms in ABA-treated seedlings, may reduce the active
oxygen produced by salinity. The changes in gene expression
and peroxidase isoforms may be selected to adaptation of
wheat seedlings to NaCl-salinity.