【正文】
+/H+ antiporters are investigated in numerous plant species under saline environment. In this review, information is presented on responses of tonoplast and plasma membrane ATPases and Na+/H+ antiporters to salinity. Inconsistencies exist in some of the information and this may be due to differences in cultivars, experimental conditions, salt level used and plant age. Correlation between increased activity and expression of these transport proteins and adaptation to salinity is proposed, although this correlation is based on untested hypotheses. This precludes a general conclusion to be drawn concerning the involvement of membrane transport systems in plant salt tolerance. It is obvious that further extensive studies are needed in this area.