Inoculation with Metal-Mobilizing Plant-Growth-Promoting Rhizobacterium Bacillus sp. SC2b and Its Role in Rhizoremediation

摘要: A plant growth-promoting bacterial (PGPB) strain SC2b was isolated from the rhizosphere of Sedum plumbizincicola grown in lead (Pb)/zinc (Zn) mine soils and characterized as Bacillus sp. based on (1) morphological biochemical characteristics (2) partial 16S ribosomal DNA sequencing analysis. Strain exhibited high levels resistance to cadmium (Cd) (300 mg/L), Zn (730 Pb (1400 mg/L). This also showed various (PGP) features such utilization 1-aminocyclopropane-1-carboxylate, solubilization phosphate, production indole-3-acetic acid siderophore. The mobilized concentration heavy metals different biosorption capacity toward tested metal ions. further assessed for PGP activity by phytagar assay with a model Brassica napus. Inoculation increased biomass vigor index B. Considering potential, pot experiment conducted assess effects inoculating metal-resistant PGPB growth uptake Cd, S. metal-contaminated agricultural soils. elevated shoot root leaf chlorophyll content plumbizincicola. Similarly, plants inoculated demonstrated markedly higher Cd accumulation system, indicating that enhanced through mobilization or plant-microbial mediated changes chemical biological soil properties. Data might serve future biofertilizer an effective mobilizing bioinoculant rhizoremediation polluted