The Heavy Metals Copper And Zinc Pollution Of Masson Pine And Its Ectomycorrhizal Carbon Metabolism

Pinus massoniana were grown in Perlite.Five weeks after germination the seedlings were inoculated with ectomycorrhizal fungi: Boletus edulis or U Gomphidius yiscidus. After eight weeks of inoculation, the ectomycorrhizal colonization rates were 65%, the seedlin~ were exposed to the nutrition solution containing a different concentration of CuSO4.5H20 and ZnSO4.7H20 After eight weeks of exposing, i.e. twenty-one weeks old seedlings were harvested and analyzed. The results showed that biomas~ activities of HIC PFK. PK in mycorrhized seedlings were higher than that of fungus-free plants.Ectomycorrhizal colonization protected Pinus seedlings from heavy metal toxicity. In needles and roots the Cu concent in mycorrhized seedlings was lower than that of fungus-free plants. At SOppm and 200ppm, Zn concent in needles and roots was lower than that of fungus-free plants,while at SOOppm it was higher.The protection function in Boletus edulis mycorrhized seedlings were stronger than that of Gomphidius viscidus mycorrhized seedlings.The ability accumulation of Cu and Zn in plant were different with mycorrhizal fimgi species of inoculation, concentration of heavy metals in growing medium and the degree of compatibility between fungal strain and plant.