Abstract
Microorganisms living in anoxic rice soils contribute 10 to 25% of global methane emissions. The most important carbon source for CH4 production is plant-derived carbon that enters soil as root exudates and debris. Pulse labeling of rice plants with 13CO2 resulted in incorporation of 13C into the ribosomal RNA of Rice Cluster I Archaea in the soil, indicating that this archaeal group plays a key role in CH4 production from plant-derived carbon. This group of microorganisms has not yet been isolated but appears to be of global environmental importance.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Archaea / classification
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Archaea / genetics
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Archaea / growth & development
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Archaea / metabolism*
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Carbon Dioxide / metabolism
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Carbon Isotopes / metabolism*
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Cloning, Molecular
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Ecosystem*
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Hydrogen / metabolism
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Methane / metabolism*
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Molecular Sequence Data
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Oryza / metabolism
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Oryza / microbiology*
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Photosynthesis
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Phylogeny
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Plant Roots / metabolism
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Plant Roots / microbiology
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Polymorphism, Restriction Fragment Length
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RNA, Archaeal / metabolism
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RNA, Ribosomal, 16S / genetics
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RNA, Ribosomal, 16S / metabolism
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Soil Microbiology*
Substances
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Carbon Isotopes
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RNA, Archaeal
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RNA, Ribosomal, 16S
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Carbon Dioxide
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Hydrogen
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Methane