Biological H2 and CO oxidation activities are sensitive to compositional change of soil microbial communities

Saavedra-Lavoie, Julien; de la Porte, Anne; Piché-Choquette, Sarah; Guertin, Claude ORCID: https://orcid.org/0000-0002-0710-6970 et Constant, Philippe ORCID: https://orcid.org/0000-0003-2739-2801 (2020). Biological H2 and CO oxidation activities are sensitive to compositional change of soil microbial communities Canadian Journal of Microbiology , vol. 66 , nº 4. pp. 263-273.

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Résumé

Trace gas uptake by microorganisms controls the oxidative capacity of the troposphere, but little is known about how this important function is affected by changes in soil microbial diversity. This article bridges that knowledge gap by examining the response of the microbial community level physiological profiles (CLPPs), carbon dioxide (CO2) production, and molecular hydrogen (H2) and carbon monoxide (CO) oxidation activities to manipulation of microbial diversity in soil microcosms. Microbial diversity was manipulated by mixing non-sterile and sterile soil with and without the addition of antibiotics. Non-sterile soil without antibiotics was used as a reference. Species composition changed significantly in soil microcosms as result of dilution and antibiotic treatments, but there was no difference in species richness, according to PCR amplicon sequencing of the bacterial 16S rRNA gene. The CLPP was 15% higher in all dilution and antibiotic treatments than in reference microcosms, but the dilution treatment had no effect on CO2 production. Soil microcosms with dilution treatments had 58-98% less H2 oxidation and 54-99% lower CO oxidation, relative to reference microcosms, but did not differ amongst the antibiotic treatments. These results indicate that H2 and CO oxidation activities respond to compositional changes of microbial community in soil.

Type de document:	Article
Mots-clés libres:	carbon monoxide; gaz à l’état de traces; hydrogène moléculaire; microbial ecology; molecular hydrogen; monoxyde de carbone; trace gas; écologie microbienne
Centre:	Centre INRS-Institut Armand Frappier
Date de dépôt:	20 juill. 2021 04:19
Dernière modification:	18 nov. 2022 16:15
URI:	https://espace.inrs.ca/id/eprint/11675

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