Tolenrance to Compound Lead-zinc Stress of the Symbiosis of the Legume-rhizobia in Huize Lead-zinc Mining Tailings

摘要

In order to use remediation of contaminated soil and revegetation in Huize lead-zinc mining tailings, it was significant to study of the lead-zinc tolenrance of the symbiosis of the legume-rhizobia in Huize lead-zinc mining tailings. In this paper, the tolenrance to compound lead-zinc stress of the symbiosis of the legume-rhizobia was studied. The results showed that the legume seeds grew natually in Huize lead-zinc mining tailings had the good resistence to compound lead-zinc. The host plants inoculated the two high tolenrance to lead-zinc strains HS3 and HZ8 showed that the capability of host plants to resist compound lead-zinc stress was stronger than those were not inoculated and are sensitive to metal resistence rhizobia. The HS3 and HZ8 could decrease the concentrations of lead-zinc of the surrounding surface of nodule and could be beneficial to the metal lead-zinc tolerance of the symbiosis of legume-rhizobia by the combination of the lead-zinc and the polysaccharides and many other secrations of the nodule surface. The comprehensive reaction mechanism of heavy metal tolenrance to lead-zinc of the symbiosis of legume-rhizobia HS3 and HZ8 is worth studying.