This study explores the interactive effects of iron oxide nanoparticles and microbial inoculants on the physiological response and phytoremediation potential of Solanum nigrum L.under cadmium(Cd)stress.Utilizing Bacillus simplex and Mucor circinelloides as microbial inoculants,and iron oxide nanoparticles as an exogenous supplement,a controlled pot experiment was conducted with Solanum nigrum L.The assessment criteria included variations in metallothionein(MTs)levels,plant biomass,and Cd accumulation within the soil-plant system.Ultraviolet-visible spectroscopy demonstrated its efficacy in swiftly quantifying MTs in Solanum nigrum L.leaves,revealing a peak absorption at 317 nm with a robust linear correlation.The MTs quantification revealed that both Bacillus simplex and Mucor circinelloides,either individually or in combination,significantly stimulated MTs synthesis in Solanum nigrum L.,facilitating the sequestration of Cd ions and thereby mitigating Cd-induced phyto-toxicity.This was reflected in augmented plant biomass and improved Cd extraction efficiencies,aligning with the growth-enhancing attributes of the microorganisms.Mucor circinelloides exhibited a pronounced detoxification effect,with a 86.95％increase in MTs content,a 44.59％rise in biomass,and a 47.26％elevation in leaf Cd concentration compared to the control.Conversely,the sole application of iron oxide nanoparticles did not elicit a marked alteration in MTs levels within Solanum nigrum L.
关键词
镉(Cd)/龙葵/植物解毒/土壤修复/纳米氧化铁/金属硫蛋白(MTs)
Key words
Cd/Solanum nigrum L./plant detoxification/soil remediation/nano iron oxide/MT
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