原文服务方: 地球化学学报(英文)       
摘要:
Iron oxidation is a prevalent and important biogeochemical process in paddy soil, but little is known about whether and how microbially mediated iron oxidation is coupled with carbon assimilation, particularly under microaerobic conditions. Here, we investigated kinetics of CO2 assimilation and Fe(Ⅱ) oxidation in an incubation experiment with paddy soil under suboxic conditions, and profiled the associated microbial community using DNAstable isotope probing and 16S rRNA gene-based sequencing. The results showed that CO2 assimilation and Fe(Ⅱ) oxidation in the gradient tubes were predominantly mediated by the microbes enriched in the paddy soil, primarily Azospirillum and Magnetospirillum, as their relative abundances were higher in the 13C heavy fractions compared to 12C heavy fractions. This study provided direct evidence of chemoautotrophic microaerophiles linking iron oxidation and carbon assimilation at the oxic-anoxic interface in the paddy soil ecosystem.
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篇名 Microaerobic iron oxidation and carbon assimilation and associated microbial community in paddy soil
来源期刊 地球化学学报(英文) 学科
关键词 Paddy soil Microaerobic Fe(Ⅱ)-oxidation CO2 assimilation SIP
年,卷(期) 2017,(3) 所属期刊栏目
研究方向 页码范围 502-505
页数 3页 分类号
字数 语种 英文
DOI 10.1007/s11631-017-0219-6
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Paddy soil
Microaerobic Fe(Ⅱ)-oxidation
CO2 assimilation
SIP
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地球化学学报(英文)
双月刊
2096-0956
52-1161/P
大16开
贵州省贵阳市观水路46号地球化学研究所
1982-01-03
英文
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294
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