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| Effects of different valent antimony on the bacterial diversity and community structure of drilosphere |
| Received:July 22, 2023 |
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| KeyWord:antimony;Eisenia fetida;drilosphere;microbial diversity |
| Author Name | Affiliation | E-mail | | CHEN Linyu | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | ZHANG Xiyao | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | FENG Peiyuan | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | LUO Jiahao | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | YANG Xiaoqi | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | DENG Yuyang | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | ZHENG Yu | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | DUAN Renyan | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | BAI Jing | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | jingbai@outlook.com |
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| Abstract: |
| Earthworms were exposed to soils contaminated with Sb（Ⅲ）and（or）Sb（Ⅴ）to study the differences in microbial community structure of drilosphere（gut and burrow lining）before and after the disturbance and digestion of Sb-contaminated soil by earthworms. The result shows that：the microbial diversity of earthworm gut, burrow lining, and control soil is significantly different. With the increase in culture time and Sb concentration, the Chao1 index, Shannon index, and Pielou index of the drilosphere matrix significantly reduced. The drilosphere presents a unique microbial community structure, and the relative abundances of Comamonas_testosteroni, Sphingobacterium_faecium, and Sphingobacterium_multivorum are higher than that of other species in high-concentration compositetreated burrow lining soil. Combined with the correlation analysis, this shows that the above three species may play a positive role in the mediating transformation of Sb（Ⅲ）. According to redundancy analysis, there is a positive correlation between Bacteroidetes and Sb（Ⅲ） content in soil; Proteobacteria is positively correlated with the content of Sb（Ⅲ）, Sb（Ⅴ）, and community coverage, indicating their resistance to Sb. Thus, the drilosphere is a potential thermal zone for the microbial-mediated transformation of Sb morphology. |
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