Fractionation of stable carbon isotopes during microbial propionate consumption in anoxic rice paddy soils

Abstract ε CH 4 CO 2 CH 3 F), an inhibitor of aceticlastic methanogenesis. Under methanogenic conditions, propionate was eventually degraded to CH 4 CH 3 F. Butyrate and CH 4 13 C -depleted relative to propionate, whereas acetate and CO 2 13 C -enriched. The isotopic enrichment factors (ε prop - - CH 4 CH 3 F hardly affected propionate degradation and acetate accumulation. The initially produced CO 2 13 C -depleted, whereas the acetate was 13 C -enriched. The values of ε prop - CO 2 involves only a little isotope fractionation. The results further indicate a major contribution of Syntrophobacter-type propionate fermentation under sulfidogenic conditions and Smithella-type propionate fermentation under methanogenic conditions. This interpretation is consistent with data regarding the microbial community composition published previously for the same soils.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Fractionation of stable carbon isotopes during microbial propionate consumption in anoxic rice paddy soils ; volume:20 ; number:17 ; year:2023 ; pages:3625-3635 ; extent:11
Biogeosciences ; 20, Heft 17 (2023), 3625-3635 (gesamt 11)

Creator
Conrad, Ralf
Claus, Peter

DOI
10.5194/bg-20-3625-2023
URN
urn:nbn:de:101:1-2023090704545703602779
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:49 AM CEST

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Associated

  • Conrad, Ralf
  • Claus, Peter

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