摘要：Salinity is one of the major abiotic stresses that adversely affect crop productivity andquality, and puts various problems to the plants either at the population, organism oreven at the molecular level. In the present investigation seedlings of Cymbopogonnardus (L.) Rendle, Pennisetum alopecuroides (L.) Spreng var. Mourdy and Vetiveriazizanioides (L.) Nash were treated with increasing concentrations of sodium chloridei.e., 25, 50, 100, 200 and 300 mM and changes in the activities of catalase, peroxidaseand acid phosphatase were determined. The activity of catalase was stimulated by 200and 300 mM NaCl but it was initially decreased at lower levels of salinity. In Cymbopogon(36.30%), Cynodon (3.07%) and Pennisetum (0.94%), it was observed to be increased,while it was decreased in the leaves of Vetiveria (60.38%) at 300 mM NaCl concentration.The elevated activities of CAT under NaCl stress (300 mM and 200 mM) level probablycame from an increased capacity for oxygen radical scavenging and maintenance ofcellular membranes which indicates the relationship between salt tolerance andantioxidant defence system. The details of the activities of other two enzymes arediscussed in the present paper.
