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Science 12 August 2005:
Vol. 309. no. 5737, pp. 1088 - 1090
DOI: 10.1126/science.1113435
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Reports

In Situ Stable Isotope Probing of Methanogenic Archaea in the Rice Rhizosphere

Yahai Lu1,2 and Ralf Conrad2*

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.

1 College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China.
2 Max-Planck-Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße, 35043 Marburg, Germany.

* To whom correspondence should be addressed. E-mail: conrad{at}staff.uni-marburg.de

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Dynamics of the Methanogenic Archaeal Community during Plant Residue Decomposition in an Anoxic Rice Field Soil.
J. Peng, Z. Lu, J. Rui, and Y. Lu (2008)
Appl. Envir. Microbiol. 74, 2894-2901
   Abstract »    Full Text »    PDF »
Methanocella paludicola gen. nov., sp. nov., a methane-producing archaeon, the first isolate of the lineage 'Rice Cluster I', and proposal of the new archaeal order Methanocellales ord. nov..
S. Sakai, H. Imachi, S. Hanada, A. Ohashi, H. Harada, and Y. Kamagata (2008)
Int J Syst Evol Microbiol 58, 929-936
   Abstract »    Full Text »    PDF »
Isolation of Key Methanogens for Global Methane Emission from Rice Paddy Fields: a Novel Isolate Affiliated with the Clone Cluster Rice Cluster I.
S. Sakai, H. Imachi, Y. Sekiguchi, A. Ohashi, H. Harada, and Y. Kamagata (2007)
Appl. Envir. Microbiol. 73, 4326-4331
   Abstract »    Full Text »    PDF »
Stable Isotope Probing: Linking Functional Activity to Specific Members of Microbial Communities.
H. W. Kreuzer-Martin (2007)
Soil Sci. Soc. Am. J. 71, 611-619
   Abstract »    Full Text »    PDF »
Identification of Acetate-Assimilating Microorganisms under Methanogenic Conditions in Anoxic Rice Field Soil by Comparative Stable Isotope Probing of RNA.
T. Hori, M. Noll, Y. Igarashi, M. W. Friedrich, and R. Conrad (2007)
Appl. Envir. Microbiol. 73, 101-109
   Abstract »    Full Text »    PDF »
Identification of Bacterial Micropredators Distinctively Active in a Soil Microbial Food Web.
T. Lueders, R. Kindler, A. Miltner, M. W. Friedrich, and M. Kaestner (2006)
Appl. Envir. Microbiol. 72, 5342-5348
   Abstract »    Full Text »    PDF »
Genome of Rice Cluster I Archaea--the Key Methane Producers in the Rice Rhizosphere..
C. Erkel, M. Kube, R. Reinhardt, and W. Liesack (2006)
Science 313, 370-372
   Abstract »    Full Text »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)