Effects of single heavy metal pollution on the growth and physiological and biochemical characteristics of Eulaliopsis binata

The effects of Cd,Pb,Cu,Zn and As on the growth and physiological and biochemical characteristics of Eulaliopsis binata were studied.The results show that the resistance of Eulaliopsis binata root to heavy metals is stronger than that of shoot.The critical values of Cd,Pb,Cu of the polluted soil that Eulaliopsis binata is grown on are 10mg/kg,300mg/kg and 100 mg/kg,respectively.The pot experimental results show that contents of chlorophyll and chlorophyll a/b in Eulaliopsis binata growing in treated soils with Cd,Pb,Cu,Zn and As separately are less than those of CK.With the increase of the concentration of Cd,Pb,Cu,Zn and As,the content of chlorophyll increases first and decreases afterwards.With the increase of the concentration of As and Cd,the activity of SOD increases first and decreases afterwards.But the activity of SOD decreases with the increase of the concentration of Pb,Cu and Zn.The activity of CAT and POD increases with the increase of the concentration of As and increases first and decreases afterwards with the increase of the concentration of Cd,Pb,Cu and Zn.