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4950631 
Journal Article 
Effect of Phosphate-Solubilizing Bacteria on the Mobility of Insoluble Cadmium and Metabolic Analysis 
Yang, P; Xue-Fang, Z; Li-Li, W; Qu-Sheng, Li; Zhou, T; Yu-Kun, C; Zi-Yi, Z; Bao-Yan, He 
2018 
Yes 
International Journal of Environmental Research and Public Health
ISSN: 1661-7827
EISSN: 1660-4601 
MDPI AG 
15 
7 (Jul 2018) 
1330 
English 
29941813 
WOS:000445543500036 
Phosphate-solubilizing bacteria (PSB) can promote plant growth by dissolving insoluble phosphate. Therefore, PSB may have the potential to improve the mobility of heavy metals in soils and enhance phytoextraction. This study isolated a few PSB strains that could dissolve CdCO3 and solid Cd in soil. Two typical PSB, namely, high- and low-Cd-mobilizing PSB (Pseudomonas fluorescens gim-3 and Bacillus cereus qh-35, respectively), were selected to analyze the metabolic profiles, metabolic pathways, and mechanisms of mobilization of insoluble Cd. A total of 34 metabolites secreted by the two PSB strains were identified. Gluconic acid was the main contributor to Cd dissolution (42.4%) in high-Cd-mobilizing PSB. By contrast, gluconic acid was not secreted in low-Cd-mobilizing PSB. Metabolic pathway analysis showed that gluconic acid was produced by the peripheral direct oxidation pathway. Hence, PSB with peripheral direct oxidation pathway were likely to have high-Cd-mobilizing capacity. 
Bacteria; Acids; Mobility; Oxidation; Cadmium; Metabolites; Metabolism; Plant growth; Phosphates; Soil improvement; Gluconic acid; Soil contamination; Metabolic pathways; Studies; Heavy metals; Strains (organisms); Dissolution; Pseudomonas fluorescens