蛋白质细菌
相对物种丰度
丰度(生态学)
土壤pH值
土壤污染
环境化学
微生物种群生物学
环境修复
群落结构
土壤分类
土工试验
土壤微生物学
污染
土壤水分
生物
污染
环境科学
生态学
16S核糖体RNA
细菌
化学
遗传学
作者
Chuning Ji,Jiu Huang,Jinglong Li,Xuemeng Zhang,Guang Yang,Youran Ma,Zhipeng Hao,Xin Zhang,Baodong Chen
标识
DOI:10.1016/j.jenvman.2023.119335
摘要
Addressing the widespread concern of chromium (Cr) pollution, this study investigated its impacts on bacterial communities across eight soil types, alongside the potential Cr transformation-related genes. Utilizing real-time PCR, 16S rRNA gene sequencing and gene prediction, we revealed shifts in bacterial community structure and function at three Cr exposure levels. Our results showed that the bacterial abundance in all eight soil types was influenced by Cr to varying extents, with yellow‒brown soil being the most sensitive. The bacterial community composition of different soil types exhibited diverse responses to Cr, with only the relative abundance of Proteobacteria decreasing with increasing Cr concentration across all soil types. Beta diversity analysis revealed that while Cr concentration impacted the assembly process of bacterial communities to a certain extent, the influence on the compositional structure of bacterial communities was primarily driven by soil type rather than Cr concentration. The study also identified biomarkers for each soil type under three Cr levels, offering a basis for monitoring changes in Cr pollution. By predicting crucial functional genes related to Cr transformation, it was observed that the relative abundance of chrA (chromate transporter) in yellow‒brown soil significantly exceeded that in all other soil types, suggesting its potential for Cr adaptation. The study also revealed correlations among soil physicochemical properties, Cr concentration, and these functional genes, providing a foundation for future research aimed at more precise functional analysis and the development of effective soil remediation strategies.
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