《Table 1 Morphology and maximal tolerable Cd2+concentration of Cd-tolerant bacterial strains》

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《铅锌尾矿周边稻田土壤中耐镉细菌的分离筛选（英文）》

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Totally，6 different forms of bacterial strains were isolated after repeated isolation and purification on LB solid media（Cd2+concentration:100 mg/L）.The colonial morphologies and maximal tolerable concentrations were obtained through gradient screening（Table 1）.The results showed that all 6strains could grow on the solid medium at a Cd2+concentration of 500 mg/L.Particularly，the maximal tolerable Cd2+concentration of KGJ and KDT reached700 mg/L，and for TU，the maximum was as high as900 mg/L.Therefore，bacterial strain KGJ，KDT and TU were chosen for the following study.