In order to assess the role of the antioxidative defense system against salt treatment, the activities of some antioxidative enzymes were monitored in a true mangrove, Excoecaria agallocha subjected to varying levels of NaCl. Salt stress was imposed on 60-days old plants with five different concentrations of NaCl (0, 100, 200, 300, 400 and 500 mM) NaCl. NaCl induced significant differences in quantities of proteins. Nacl stress enhanced activities of SOD, CAT and POX. Further in isoenzyme

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... s, 3 SOD isoenzymes (SOD1, SOD2 and SOD3), and 4 POX isoenzymes were detected with the treatment. Increase in antioxidant enzyme activity could be a response to cellular damage induced by NaCl. This increase could not stop the deleterious effect of NaCl but it reduced stress severity and thus allow to plant grow up in mangrove saline habitat.