Abstract:Salinity stress results in a clear stunting of plants, and disturbances in ion homeostasis. There are many different types of salts and almost an equally diverse set of constraints for plant growth. For ecological reconstruction in the coast of Lingang （30°54′ N, 121°52′ E）in Shanghai, the seedling growth and ion distribution in different tissues of Festuca arundinacea were studied in pot experiments, which have the same salt constitute as the coastal saline soil. Seed emergence of Festuca arundinacea was carried out under non-saline environment for about 5 days. A group of different concentrations of NaCl were then added to the pots and the salinity was maintained at 0, 50, 100, 150, 200, 300 mmol/L and 400 mmol/L. The seedling growth, water content, and ions concentration of different tissues were analyzed after 15 days of salt-stress cultivation. A negative relationship between seedling growth and salt concentration was obtained. The flesh weight, dry weight and water content of shoot and root did not decrease significantly in response to low salinity. However, high concentrations of NaCl lead to detrimental effects on the growth of Festuca arundinacea, but the roots of this plant were maintained normally. Ion uptake and homeostasis were disturbed under high salinity. Increased treatment of NaCl induces increase in Na+ and decrease in Ca2+ and K+ levels in the roots and shoots. Mg2+ concentration in roots and shoots does not vary with the concentration of Na+. The ratios of K/Na, Ca/Na and Mg/Na in roots and shoots decrease with increased salinity.