Effects of Three Sodium Salt Stress on Seed Germination of Festuca sinensis

The influence of NaCl stress,NaHCO3 stress and Na2CO3 stress on seed germination rate,plumule length and radical length of F.sinensis was studied through a germination test in the laboratory to explore the seed germination characteristics of F.sinensis under different sodium salt stress.Results: 1) The F.sinensis seeds could germinate naturally when NaCl concentration≤200 mmol/L,NaHCO3 concentration≤100 mmol/L and Na2CO3 concentration≤50 mmol/L.The seed germination was significantly inhibited when NaCl concentration=300 mmol/L,NaHCO3 concentration=150 mmol/L and Na2CO3 concentration=100 mmol/L.And the seeds did not germinate when NaCl concentration=500 mmol/L,NaHCO3 concentration=300 mmol/L and Na2CO3 concentration=150 mmol/L.The plumule length and radical length decreased rapidly with the increasing of sodium salt concentration.The radical growth was slightly higher than the control when NaCl concentration was 50 mmol/L.