Toxic Effect of Cd and Hg Stress on Pea Seed

[Objective] The study was to relief the toxic effect of heavy metal ions on pea seed.[Method] With method of water culture,the effect of alone stress by Cd or Hg and combined stress by two of them on seed germination,chlorophyll content and activity of peroxidase of seeding of pea were studied.[Result] The alone stress by Cd or Hg and their combined stress all had inhibition on seed germination of pea,and the toxic effect of alone stress by Hg was the biggest,the following was that of combined stress by Cd and Hg,that of alone stress by Cd was the smallest.The alone stress by Cd on the chlorophyll content of seeding was the highest,the following was that combined stress by Cd and Hg,and alone stressed by Hg was the lowest.The gray value in pea seed with alone stress by Hg was 67.00% of that with alone stress by Cd,and that with combined stress by Cd and Hg was 91.32% of that with alone stress by Cd.The mobility of enzyme belt in pea seed with alone stress by Hg was the biggest,the following was that with combined stress by Cd and Hg.[Conclusion] The toxic effect of Hg stress on pea seed was bigger than that of Cd stress,and that of combined stress by Cd and Hg was between of them.