Phosphate-mineralizing bacteria (PMBs) have been widely studied by inducing phosphate heavy metal precipitation, but current researches neglect to study their effects on soil-microbe-crop systems on cadmium (Cd) contaminated. Based on this, a strain PMB, sp. PMB-5, was inoculated into Cd contaminated pots to detect soil characteristics, Cd occurrence forms, soil biological activities, plant physiological and biochemical indicators. The results showed that the inoculation of strain PMB-5 significantly increased the available phosphorus content (85.97%−138.64%), Cd-residual fraction (11.04%−29.73%), soil enzyme activities (31.94%−304.63%), plant biomass (6.10%−59.81%), while decreased the state of Cd-HOAc (11.50%−31.17%) and plant bioconcentration factor (23.76%−44.24%). These findings indicated that strain PMB-5 could perform the function of phosphorus solubilization to realize the immobilization of Cd in the complex soil environment. Moreover, SEM-EDS, FTIR, XPS, and XRD analysis revealed that strain PMB-5 does not significantly alter the soil morphology, structure, elemental distribution, and chemical composition, which suggested that remediation of Cd contamination using strain PMB-5 would not further burden the soil. This research implies that PMB-5 could be a safe and effective bioinoculant for remediating Cd-contaminated soils, contributing to the sustainable management of soil health in contaminated environments.

中文翻译：

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磷矿化细菌肠杆菌的综合生物修复作用。 PMB-5 对镉污染的土壤-作物系统的影响

磷酸盐矿化细菌（PMBs）通过诱导磷酸盐重金属沉淀已被广泛研究，但目前的研究忽视了其对土壤-微生物-作物系统对镉（Cd）污染的影响。在此基础上，菌株PMB，sp。将PMB-5接种到Cd污染盆中，检测土壤特性、Cd赋存形态、土壤生物活性、植物生理生化指标。结果表明，接种菌株PMB-5显着提高了速效磷含量（85.97%−138.64%）、镉残留分数（11.04%−29.73%）、土壤酶活性（31.94%−304.63%）、植物生物量。 (6.10%−59.81%)，同时降低了Cd-HOAc状态(11.50%−31.17%)和植物生物浓缩因子(23.76%−44.24%)。这些结果表明，菌株PMB-5可以发挥溶磷功能，实现复杂土壤环境中Cd的固定化。此外，SEM-EDS、FTIR、XPS和XRD分析表明，菌株PMB-5不会显着改变土壤形态、结构、元素分布和化学成分，这表明菌株PMB-5对镉污染的修复不会显着改变土壤形态、结构、元素分布和化学成分。进一步加重土壤负担。这项研究表明，PMB-5 可能是一种安全有效的生物接种剂，用于修复镉污染的土壤，有助于污染环境中土壤健康的可持续管理。