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Mobile Incubator for Iron(III) Reduction in the Gut of the Soil-Feeding Earthworm Pheretima guillelmi and Interaction with Denitrification
Zhou, Guo-Wei; Yang, Xiao-Ru; Sun, An-Qi; Li, Hu; Lassen, Simon Bo; Zheng, Bang-Xiao; Zhu, Yong-Guan
2019-04-16
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume53Issue:8Pages:4215-4223
AbstractDiets of soil-feeding earthworms contain abundant nitrate and iron(III) oxides, which are potential electron acceptors for mineralization of organic compounds. The earthworm gut provides an ideal habitat for ingested iron(III)-reducing microorganisms. However, little is known about iron(III) reduction and its interaction with other processes in the guts of earthworms. Here, we determined the dynamics of iron(III) and revealed its interaction with the turnover of organic acids and nitrate in the gut of the earthworm Pheretima guillelmi. Samples from gut contents combined with anoxic incubation were used for chemical analysis and 16S rRNA based Illumina sequencing. Chemical analysis showed that higher ratios of iron(II)/iron(III), nitrite/nitrate, and more abundant organic acids were contained in the in vivo gut of the earthworm P. guillelmi than those in the in situ soil. A higher rate of iron(III) reduction was detected in treatments of microcosmic incubation with gut contents (IG gut) than that with soil (IG soil), and nitrate reduction occurred earlier than iron(III) reduction in both treatments. Potential iron(III) reducers were dominated by fermentative genera Clostridium, Bacillus, and Desulfotomaculum in the treatment of IG gut, while they were dominated by dissimilatory iron(III)-reducing genera Geobacter in the treatment of IG soil. The iron(III)-reducing microbial community shared several genera with denitrifers in the treatment of IG gut, revealing a close link between iron(III) reduction and denitrification in the gut of earthworms. Collectively, our findings demonstrated that iron(III) reduction occurred along the gut and provided novel insights into the great contribution of earthworm gut microbiota on Fe and the associated C and N cycling in soil environments.
Department城市与区域生态国家重点实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/42758
Collection城市与区域生态国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China
2.Chinese Acad Sci, State Key Lab Urban & Reg Ecol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
3.Huaqiao Univ, Dept Environm Sci & Engn, Xiamen 361021, Peoples R China
4.Univ Copenhagen, Fac Sci, Dept Plant & Environm Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
5.Univ Helsinki, Falculty Biol & Environm Sci, Ecosyst & Environm Res Programme, Niemenkatu 73, Lahti 15140, Finland
Recommended Citation
GB/T 7714
Zhou, Guo-Wei,Yang, Xiao-Ru,Sun, An-Qi,et al. Mobile Incubator for Iron(III) Reduction in the Gut of the Soil-Feeding Earthworm Pheretima guillelmi and Interaction with Denitrification[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(8):4215-4223.
APA Zhou, Guo-Wei.,Yang, Xiao-Ru.,Sun, An-Qi.,Li, Hu.,Lassen, Simon Bo.,...&Zhu, Yong-Guan.(2019).Mobile Incubator for Iron(III) Reduction in the Gut of the Soil-Feeding Earthworm Pheretima guillelmi and Interaction with Denitrification.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(8),4215-4223.
MLA Zhou, Guo-Wei,et al."Mobile Incubator for Iron(III) Reduction in the Gut of the Soil-Feeding Earthworm Pheretima guillelmi and Interaction with Denitrification".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.8(2019):4215-4223.
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