A comparison of salt resistance of three kinds of Zoysiaat different salt concentrations

To determine the difference in salinity resistance of Zoysia species,Z.macrostachya,Z.metrella and Z.japonica were used to study the effects on leaf protective enzymes(POD,SOD,CAT),MDA,proline, chlorophyll,and soluble protein content under different salinity treatments(0,0.20%,0.40%,0.60%and 0. 80%)after a 40days incubation.As the salt concentration increased,the changes in activities of leaf protective enzymes and the proline content increased.At 0.80% salt concentration,leaf protective enzymes of Z.macrostachyahad higher activity and lower MDA and proline contents.At lower salt concentrations(0.40%),as the salt concentration increased,the total chlorophyll content and the soluble protein content of all Zoysiaspecies increased,while they decreased at higher concentrations(0.60%).At 0.80%salt concentration,the total chlorophyll and soluble protein contents of Z.macrostachyawere higher,and the decline was smaller than in the other Zoysiaspecies.This showed that Z.macrostachyahad the highest salt resistance of the three Zoysiaspecies.