Effects of NaOH Treatment on Germination and Physiological Characteristic of Zoysia japonica Seeds

The activity of peroxidase and α-amylase and the content of relative water and sugar were determined during seed germination of Zoysia japonica by socking in 30% NaOH for 60 min.The results indicated that not only the time of germination was reduced but also the germination rate,germination vigor and vigor index were improved obviously with the treatment respectively,and the contents of relative water and sugar and the activities of peroxide enzyme and α-amylase in the seed with treatment of NaOH substantially higher than that of the control group during germination.The relative water content and the activity of Peroxide enzyme increased gradually in proceeding of germination,and the activity of α-amylase increased continuously before germination,then declined rapidly after germination.The changing curve of content of sugar was continuously with a maximum appeared at the 15th day.To break the dormancy of the seed,removing the stress of seed coat and activiting the respiratory metabolism pathway were very important.