镉(Cd)污染不仅危害土壤微生物生态和作物生产,但也威胁着人类健康。截至目前,微生物辅助植物修复已被证明是镉污染土壤植被恢复的一种有前途的方法。因此,重要的是找到这种耐受的微生物。在本研究中,我们接种了耐镉的细菌菌株，Cdb8-1，对Cd污染的土壤，然后探讨了Cdb8-1接种对紫云英性能的影响。结果表明，株高，根长,与未接种对照组相比，接种Cdb8-1的土壤中生长的紫云英的鲜重和干重增加。用Cdb8-1接种Cd污染的土壤还增强了其抗氧化防御系统，并降低了H2O2和丙二醛（MDA）含量，减轻了Cd的植物毒性。在Cd污染的土壤中接种Cdb8-1减弱了土壤中总Cd和有效Cd的含量，并增加了紫云英的BCF和TF。表明耐Cd细菌Cdb8-1和紫云英的联合应用是Cd污染土壤的潜在解决方案。
Cadmium (Cd) pollution has attracted global attention because it not only jeopardizes soil microbial ecology and crop production, but also threatens human health. As of now, microbe-assisted phytoremediation has proven to be a promising approach for the revegetation of Cd-contaminated soil. Therefore, it is important to find such tolerant microorganisms. In the present study, we inoculated a bacteria strain tolerant to Cd, Cdb8-1, to Cd-contaminated soils and then explored the effects of Cdb8-1 inoculation on the performance of the Chinese milk vetch. The results showed plant height, root length, and fresh and dry weight of Chinese milk vetch grown in Cdb8-1-inoculated soils increased compared to the non-inoculated control group. The inoculation of Cd-contaminated soils with Cdb8-1 also enhanced their antioxidant defense system and decreased the H2O2 and malondialdehyde (MDA) contents, which alleviated the phytotoxicity of Cd. The inoculation of Cdb8-1 in Cd-contaminated soils attenuated the contents of total and available Cd in the soil and augmented the BCF and TF of Chinese milk vetch, indicating that the combined application of Cd-tolerant bacteria Cdb8-1 and Chinese milk vetch is a potential solution to Cd-contaminated soils.
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