Biogeosciences
Biogeosciences
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Articles | Volume 12, issue 6
Articles | Volume 12, issue 6
https://doi.org/10.5194/bg-12-1907-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-1907-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 12, issue 6
Technical note
 | 
23 Mar 2015
Technical note |  | 23 Mar 2015

Technical Note: Methionine, a precursor of methane in living plants

K. Lenhart, F. Althoff, M. Greule, and F. Keppler

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Short summary
Plants are known as a source of methane (CH4), but the biochemical mechanisms involved in CH4 formation are still unknown. Employing 13C-labelled methionine clearly identified the sulfur-bound methyl group of methionine as a carbon precursor of CH4 released from lavender plants. When relating CH4 emission rates to dark respiration of intact plants, we found a molar CH4:CO2 emission ratio of 2.0 ±1.1 (pmol:µmol). After physical stress CH4 release rates greatly increased.
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