Spatial heterogeneity of high-affinity H2 oxidation activity in agricultural soil profile

Hou, Lijun; Constant, Philippe ORCID: https://orcid.org/0000-0003-2739-2801 et Whalen, Joann (2025). Spatial heterogeneity of high-affinity H2 oxidation activity in agricultural soil profile Soil Biology and Biochemistry , vol. 202 , nº 109703. pp. 1-3. DOI: 10.1016/j.soilbio.2024.109703.

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Résumé

Soil H2 oxidizing bacteria metabolize H2 from the atmosphere, but soil carbon substrates and environmental factors influence their distribution in the soil profile. We conducted a field survey of the spatial distribution of H2 content and high-affinity H2 oxidation activity in the soil profile (5 cm, 15 cm, and 35 cm) and between the soybean rhizosphere and bulk soil. We found the H2 content declined exponentially with soil depth, but potential H2 oxidation activity was consistent at all soil depths. The rhizosphere soil had 66% more high-affinity H₂ oxidation activity than bulk soil. Simultaneous presence of H2 and carbon likely facilitates mixotrophic growth of H2 oxidizing bacteria in the rhizosphere.

Type de document:	Article
Mots-clés libres:	Hydrogen (H2) concentration; Spatial distribution; Soil depth; Trace gas; Field survey
Centre:	Centre INRS-Institut Armand Frappier
Date de dépôt:	13 janv. 2025 14:31
Dernière modification:	10 mars 2025 00:55
URI:	https://espace.inrs.ca/id/eprint/16261

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