环境化学
微生物种群生物学
铁酸盐
厚壁菌
化学
蛋白质细菌
土壤水分
细菌
微生物
胞外聚合物
总有机碳
生态学
生物
生物化学
遗传学
16S核糖体RNA
有机化学
吸附
生物膜
基因
作者
Xiaolin Zhang,Yuxia Liu,Qixing Zhou,Yuge Bai,Ruixiang Li,Liyan Tian,Jin‐tian Li,Daniel S. Alessi,Kurt O. Konhauser
标识
DOI:10.1021/acs.est.3c00407
摘要
Electroactive microbes can conduct extracellular electron transfer and have the potential to be applied as a bioresource to regulate soil geochemical properties and microbial communities. In this study, we incubated Fe-limited and Fe-enriched farmland soil together with electroactive microbes for 30 days; both soils were incubated with electroactive microbes and a common iron mineral, ferrihydrite. Our results indicated that the exogenous electroactive microbes decreased soil pH, total organic carbon (TOC), and total nitrogen (TN) but increased soil conductivity and promoted Fe(III) reduction. The addition of electroactive microbes also changed the soil microbial community from Firmicutes-dominated to Proteobacteria-dominated. Moreover, the total number of detected microbial species in the soil decreased from over 700 to less than 500. Importantly, the coexistence of N-transforming bacteria, Fe(III)-reducing bacteria and methanogens was also observed with the addition of electroactive microbes in Fe-rich soil, indicating the accelerated interspecies electron transfer of functional microflora.
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