Research progress on coupling of methanogenesis and anaerobic methane oxidation in the rumen
Reducing methane emission from ruminants has important economic value and ecological significance. Anaerobic methane oxidation (AMO) is an important way to reduce methane emissions in different ecosystems, including wetlands, marine habitats and lakes. According to different electron acceptors, AMO...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2020-10-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2020.01.171 |
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| Summary: | Reducing methane emission from ruminants has important economic value and ecological significance. Anaerobic methane oxidation (AMO) is an important way to reduce methane emissions in different ecosystems, including wetlands, marine habitats and lakes. According to different electron acceptors, AMO can be divided into sulfate-dependent anaerobic methane oxidation (S-DAMO), nitrate/nitrite-dependent anaerobic methane oxidation (N-DAMO) and metal-dependent anaerobic methane oxidation (M-DAMO). Feeding nitrate and sulfate to ruminants also has methane-lowering effects; however, this process has always been thought to be the result of <inline-formula><alternatives><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:mi mathvariant="normal">N</mml:mi><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant="normal">3</mml:mn></mml:mrow><mml:mrow><mml:mo>－</mml:mo></mml:mrow></mml:msubsup></mml:math><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/C7C4F127-CB9C-4b0f-9443-E120E6537AB9-M003.jpg"/></alternatives></inline-formula> or <inline-formula><alternatives><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mml:mi mathvariant="normal">S</mml:mi><mml:msubsup><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant="normal">4</mml:mn></mml:mrow><mml:mrow><mml:mn mathvariant="normal">2</mml:mn><mml:mo>－</mml:mo></mml:mrow></mml:msubsup></mml:math><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/C7C4F127-CB9C-4b0f-9443-E120E6537AB9-M004.jpg"/></alternatives></inline-formula> competition for hydrogen as the electron acceptor. The thermodynamic reactions of N-DAMO and S-DAMO are superior to nitrate reduction reaction and sulfate reduction reaction, and if AMO can proceed in rumen, it will be of great significance to improve environment and feed utilization efficiency. Therefore, based on the description of the type of AMO, mechanisms of AMO and microorganisms involved, this paper compared the differences of nitrate and sulfate reducing methane production in the natural habitat and rumen, and found that AMO may occur in the rumen, which may be one of the reasons for the reduction of methane production in the rumen by nitrate and sulfate. |
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| ISSN: | 1008-9209 2097-5155 |