Metagenomic and(14)Ctracing evidence for autotrophic microbialCO(2)fixation in paddy soils
文献类型：期刊论文
| 作者 | Xiao, Ke-Qing; Ge, Ti-Da; Wu, Xiao-Hong; Peacock, Caroline L.; Zhu, Zhen-Ke; Peng, Jingjing; Bao, Peng; Wu, Jin-Shui; Zhu, Yong-Guan |
| 刊名 | ENVIRONMENTAL MICROBIOLOGY
 |
| 出版日期 | 2020-02 |
| 卷号 | 23期号:2页码:924-933 |
| ISSN号 | 1462-2912 |
| 英文摘要 | Autotrophic carbon dioxide (CO2) fixation by microbes is ubiquitous in the environment and potentially contributes to the soil organic carbon (SOC) pool. However, the multiple autotrophic pathways of microbial carbon assimilation and fixation in paddy soils remain poorly characterized. In this study, we combine metagenomic analysis with(14)C-labelling to investigate all known autotrophic pathways and CO(2)assimilation mechanisms in five typical paddy soils from southern China. Marker genes of six autotrophic pathways are detected in all soil samples, which are dominated by thecbbLgenes (67%-82%) coding the ribulose-bisphosphate carboxylase large chain in the Calvin cycle. These marker genes are associated with a broad range of phototrophic and chemotrophic genera. Significant amounts of(14)C-CO(2)are assimilated into SOC (74.3-175.8 mg(14)C kg(-1)) and microbial biomass (5.2-24.1 mg(14)C kg(-1)) after 45 days incubation, where more than 70% of(14)C-SOC was concentrated in the relatively stable humin fractions. These results show that paddy soil microbes contain the genetic potential for autotrophic carbon fixation spreading over broad taxonomic ranges, and can incorporate atmospheric carbon into organic components, which ultimately contribute to the stable SOC pool. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44379]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Xiao, Ke-Qing,Ge, Ti-Da,Wu, Xiao-Hong,et al. Metagenomic and(14)Ctracing evidence for autotrophic microbialCO(2)fixation in paddy soils[J]. ENVIRONMENTAL MICROBIOLOGY,2020,23(2):924-933. |
| APA | Xiao, Ke-Qing.,Ge, Ti-Da.,Wu, Xiao-Hong.,Peacock, Caroline L..,Zhu, Zhen-Ke.,...&Zhu, Yong-Guan.(2020).Metagenomic and(14)Ctracing evidence for autotrophic microbialCO(2)fixation in paddy soils.ENVIRONMENTAL MICROBIOLOGY,23(2),924-933. |
| MLA | Xiao, Ke-Qing,et al."Metagenomic and(14)Ctracing evidence for autotrophic microbialCO(2)fixation in paddy soils".ENVIRONMENTAL MICROBIOLOGY 23.2(2020):924-933. |
入库方式： OAI收割
来源：生态环境研究中心
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