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Conventional methanotrophs are responsible for atmospheric methane oxidation in paddy soils

Author

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  • Yuanfeng Cai

    (State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences)

  • Yan Zheng

    (School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou)

  • Paul L. E. Bodelier

    (Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10)

  • Ralf Conrad

    (Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse 10)

  • Zhongjun Jia

    (State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences)

Abstract

Soils serve as the biological sink of the potent greenhouse gas methane with exceptionally low concentrations of ∼1.84 p.p.m.v. in the atmosphere. The as-yet-uncultivated methane-consuming bacteria have long been proposed to be responsible for this ‘high-affinity’ methane oxidation (HAMO). Here we show an emerging HAMO activity arising from conventional methanotrophs in paddy soil. HAMO activity was quickly induced during the low-affinity oxidation of high-concentration methane. Activity was lost gradually over 2 weeks, but could be repeatedly regained by flush-feeding the soil with elevated methane. The induction of HAMO activity occurred only after the rapid growth of methanotrophic populations, and a metatranscriptome-wide association study suggests that the concurrent high- and low-affinity methane oxidation was catalysed by known methanotrophs rather than by the proposed novel atmospheric methane oxidizers. These results provide evidence of atmospheric methane uptake in periodically drained ecosystems that are typically considered to be a source of atmospheric methane.

Suggested Citation

  • Yuanfeng Cai & Yan Zheng & Paul L. E. Bodelier & Ralf Conrad & Zhongjun Jia, 2016. "Conventional methanotrophs are responsible for atmospheric methane oxidation in paddy soils," Nature Communications, Nature, vol. 7(1), pages 1-10, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11728
    DOI: 10.1038/ncomms11728
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    Cited by:

    1. Du, Xue-zhu & Hao, Mian & Guo, Li-jin & Li, Shi-hao & Hu, Wan-ling & Sheng, Feng & Li, Cheng-fang, 2022. "Integrated assessment of carbon footprint and economic profit from paddy fields under microbial decaying agents with diverse water regimes in central China," Agricultural Water Management, Elsevier, vol. 262(C).
    2. Tran Van Dung & Kim Thu Nguyen & Nguyen Hoang Phuc Ho & Nguyen Thanh Lich Duong & Ngoc Minh Tam Vu & Thi Phong Lan Nguyen & Long Vu Van & Ben MacDonald, 2023. "Reducing greenhouse gas emission by alternation of the upland crop rotation in the Mekong Delta, Vietnam," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 18(1), pages 16-24.
    3. Jie Zhou & Yanling Zheng & Lijun Hou & Zhirui An & Feiyang Chen & Bolin Liu & Li Wu & Lin Qi & Hongpo Dong & Ping Han & Guoyu Yin & Xia Liang & Yi Yang & Xiaofei Li & Dengzhou Gao & Ye Li & Zhanfei Li, 2023. "Effects of acidification on nitrification and associated nitrous oxide emission in estuarine and coastal waters," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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