Effects of Alkaline Stress on Seeds Germination and Embryo Growth of Zoysia japonica and Festuca arundinacea

The salt solutions with the molar ratio of NaHCO3∶Na2CO3=9∶1,30,60,90 and 120mmol/L were used for alkaline stress to measure and analyse the germination and the growth of radical and plumule of Zoysia japonica and Festuca arundinacea seeds.The results showed that the seed germination percentage,germination energy,germination index and length of radical and plumule markedly decreased with the increasing of alkaline solutions concentration.Zoysia japonica and Festuca arundinacea seeds did not germinate when the concentration of alkaline solutions reached to 90mmol/L and 120mmol/L,and 30mmol/L and 60mmol/L were critical concentrations to germination of Zoysia japonica and Festuca arundinacea seeds,respectively.The alkaline tolerance ability of Festuca arundinacea seeds were stronger than that of Zoysia japonica seeds.